Physics Le e s B 753 (2016) 424–448
Con en s lis s a ailable a ScienceDi ec
Physics Le e s B
www.else ie .com/loca e/physle b
Angula analysis o he decay B0→K∗0μ+μ− om pp collisions a
√s=8TeV
.CMS Collabo a ion
CERN, Swi ze land
a i c l e i n o a b s a c
A icle his o y:
Recei ed 29 July 2015
Recei ed in e ised o m 30 No embe 2015
Accep ed 7 Decembe 2015
A ailable online 11 Decembe 2015
Edi o : M. Dose
Keywo ds:
CMS
Physics
B0 decays
The angula dis ibu ions and he di e en ial b anching ac ion o he decay B0→K∗(892)0μ+μ−
a e s udied using da a co esponding o an in eg a ed luminosi y o 20.5 b−1collec ed wi h he CMS
de ec o a he LHC in pp collisions a √s=8TeV. F om 1430 signal decays, he o wa d–backwa d
asymme y o he muons, he K∗(892)0longi udinal pola iza ion ac ion, and he di e en ial b anching
ac ion a e de e mined as a unc ion o he dimuon in a ian mass squa ed. The measu emen s a e
among he mos p ecise o da e and a e in good ag eemen wi h s anda d model p edic ions.
©2015 CERN o he benefi o he CMS Collabo a ion. Published by Else ie B.V. This is an open access
a icle unde he CC BY license (h p://c ea i ecommons.o g/licenses/by/4.0/). Funded by SCOAP3.
1. In oduc ion
Phenomena beyond he s anda d model (SM) o pa icle physics
can mani es hemsel es di ec ly, ia he p oduc ion o new pa -
icles, o indi ec ly, by a ec ing he p oduc ion and decay o SM
pa icles. Analyses o fla o -changing neu al cu en (FCNC) de-
cays a e pa icula ly sensi i e o he e ec o new physics, since
such decays a e highly supp essed in he SM. The FCNC decay,
B0→K∗0μ+μ−(K∗0indica es he K∗(892)0, and cha ge-conjuga e
s a es a e implied o all pa icles unless s a ed o he wise), p o-
ides many oppo uni ies o sea ch o new phenomena. In addi-
ion o he b anching ac ion, o he p ope ies o he decay can
be measu ed, including he o wa d–backwa d asymme y o he
muons, AFB, and he longi udinal pola iza ion ac ion o he K∗0,
FL. To be e unde s and his decay, hese quan i ies can be mea-
su ed as a unc ion o he dimuon in a ian mass squa ed (q2).
New physics may modi y any o hese quan i ies [1–17] ela i e o
hei SM alues [1,18–24]. While p e ious measu emen s by BaBa ,
Belle, CDF, LHCb, and CMS a e consis en wi h he SM [25–29],
hey a e s ill s a is ically limi ed, and mo e p ecise measu emen s
o e he possibili y o unco e physics beyond he SM.
In his Le e , we p esen measu emen s o AFB, FL, and he di -
e en ial b anching ac ion dB/dq2 om B0→K∗0μ+μ−decays,
using da a collec ed om pp collisions a he CERN LHC by he
CMS expe imen a a cen e -o -mass ene gy o 8TeV. The da a co -
espond o an in eg a ed luminosi y o 20.5 ±0.5 b
−1[30]. The
E-mail add ess: cms-publica ion-commi ee-c[email p o ec ed].
K∗0is econs uc ed h ough i s decay o K+π−, and he B0is
econs uc ed by fi ing he wo iden ified muon acks and he
wo had on acks o a common e ex. The alues o AFB and
FLa e measu ed by fi ing he dis ibu ion o e en s as a unc-
ion o wo angula a iables: he angle be ween he posi i ely
cha ged muon and he B0in he dimuon es ame, and he angle
be ween he K+and he B0in he K∗0 es ame. All measu e-
men s a e pe o med in q2bins om 1 o 19 GeV2. The q2bins
8.68 <q2<10.09 GeV2and 12.90 <q2<14.18 GeV2, co espond-
ing o he B0→J/ψK∗0and B0→ψK∗0decays (ψ e e s o he
ψ(2S)), espec i ely, a e used o alida e he analysis. The o me
is also used o no malize he di e en ial b anching ac ion.
2. CMS de ec o
A de ailed desc ip ion o he CMS de ec o , oge he wi h a de -
ini ion o he coo dina e sys em used and he s anda d kinema ic
a iables, can be ound in Re . [31]. The main de ec o componen s
used in his analysis a e he silicon acke and he muon de ec-
ion sys ems. The silicon acke , loca ed in he 3.8 T field o a
supe conduc ing solenoid, consis s o h ee pixel laye s and en
s ip laye s ( ou o which ha e a s e eo iew) in he ba el e-
gion accompanied by simila endcap pixel and s ip de ec o s on
each side ha ex end co e age ou o |η| <2.5. Fo acks wi h
ans e se momen a 1 <pT<10 GeV and |η| <1.4, he esolu-
ions a e ypically 1.5% in pTand 25–90 (45–150) μm in he ans-
e se (longi udinal) impac pa ame e [32]. Muons a e measu ed in
he ange |η| <2.4, wi h de ec ion planes made using h ee ech-
nologies: d i ubes, ca hode s ip chambe s, and esis i e pla e
h p://dx.doi.o g/10.1016/j.physle b.2015.12.020
0370-2693/©2015 CERN o he benefi o he CMS Collabo a ion. Published by Else ie B.V. This is an open access a icle unde he CC BY license
(h p://c ea i ecommons.o g/licenses/by/4.0/). Funded by SCOAP3.
CMS Collabo a ion / Physics Le e s B 753 (2016) 424–448 425
chambe s [33]. In addi ion o he acke and muon de ec o s, CMS
is equipped wi h elec omagne ic and had onic calo ime e s ha
co e |η| <5.
E en s a e selec ed using a wo-le el igge sys em. The fi s
le el has specialized ha dwa e p ocesso s ha use in o ma ion
om he calo ime e s and muon sys ems o selec he mos in e -
es ing e en s. A high-le el igge p ocesso a m u he dec eases
he e en a e om a ound 90 kHz o a ound 400 Hz, be o e da a
s o age.
3. Recons uc ion, e en selec ion, and efficiency
The c i e ia used o selec he candida e e en s du ing da a ak-
ing ( igge ) and a e ull e en econs uc ion ake ad an age o
he ac ha B0mesons ha e ela i ely long li e imes and he e-
o e decay on a e age abou 1mm om hei p oduc ion poin .
The igge only uses muons o selec e en s, while he offline se-
lec ion includes he ull econs uc ion o all decay p oduc s.
All e en s used in his analysis we e eco ded wi h he same
igge , equi ing wo iden ified muons o opposi e cha ge o o m
a e ex ha is displaced om he pp collision egion (beamspo ).
The beamspo posi ion (mos p obable collision poin ) and size
( he ex en o he luminous egion co e ing 68% o he collisions
in each dimension) we e con inuously measu ed h ough Gaus-
sian fi s o econs uc ed e ices as pa o he online da a quali y
moni o ing. The igge equi ed each muon o ha e pT>3.5GeV,
|η| <2.2, and o pass wi hin 2cm o he beam axis. The dimuon
sys em was equi ed o ha e pT>6.9GeV, a e ex fi χ2p oba-
bili y la ge han 10%, and a sepa a ion o he e ex ela i e o he
beamspo in he ans e se plane o a leas 3σ, whe e σincludes
he calcula ed unce ain y in he e ex posi ion and he measu ed
size o he beamspo . In addi ion, he cosine o he angle, in he
ans e se plane, be ween he dimuon momen um ec o and he
ec o om he beamspo o he dimuon e ex was equi ed o
be g ea e han 0.9.
The offline econs uc ion equi es wo muons o opposi e
cha ge and wo opposi ely cha ged had ons. The muons a e e-
qui ed o ma ch hose ha igge ed he e en eadou , and also
o pass gene al muon iden ifica ion equi emen s. These include a
ack ma ched o a leas one muon segmen (collec ion o hi s in
a muon chambe consis en wi h he passage o a cha ged pa i-
cle), a ack fi χ2pe deg ee o eedom less han 1.8, hi s in a
leas six acke laye s wi h a leas wo om he pixel de ec o ,
and a ans e se (longi udinal) impac pa ame e wi h espec o
he beamspo less han 3cm (30 cm). The econs uc ed dimuon
sys em mus also sa is y he same equi emen s ha we e applied
in he igge .
The had on acks a e equi ed o ail he muon iden ifica ion
c i e ia, ha e pT>0.8GeV, and ha e an ex apola ed dis ance o
closes app oach o he beamspo in he ans e se plane g ea e
han wice he sum in quad a u e o he dis ance unce ain y and
he beamspo ans e se size. The wo had ons mus ha e an in-
a ian mass wi hin 90 MeV o he accep ed K∗0mass [34] o
ei he he K+π−o K−π+hypo hesis. To emo e con amina ion
om φ(1020) →K+K−decays, he in a ian mass o he had on
pai mus be g ea e han 1.035 GeV when he cha ged kaon mass
is assigned o bo h had ons. The B0candida es a e ob ained by fi -
ing he ou cha ged acks o a common e ex, and applying a
e ex cons ain o imp o e he esolu ion o he ack pa ame-
e s. The B0candida es mus ha e pT>8GeV, |η| <2.2, e ex
fi χ2p obabili y la ge han 10%, e ex ans e se sepa a ion
om he beamspo g ea e han 12 imes he sum in quad a u e o
he sepa a ion unce ain y and he beamspo ans e se size, and
cosαxy >0.9994, whe e αxy is he angle, in he ans e se plane,
be ween he B0momen um ec o and he line-o -fligh be ween
he beamspo and he B0 e ex. The in a ian mass mo he B0
candida e mus also be wi hin 280 MeV o he accep ed B0mass
mB0[34] o ei he he K−π+μ+μ−o K+π−μ+μ−hypo hesis.
The selec ion c i e ia a e op imized using simula ed signal samples
(desc ibed below) and backg ound om da a using sidebands o
he B0mass. A e applying he selec ion c i e ia, e en s in which
a leas one candida e is ound con ain on a e age 1.05 candida es.
A single candida e is chosen om each e en based on he bes B0
e ex fi χ2.
F om he selec ed e en s, he dimuon in a ian mass qand
i s calcula ed unce ain y σqa e used o dis inguish he signal
om he con ol samples. The con ol samples B0→J/ψK∗0and
B0→ψK∗0a e defined by |q −mJ/ψ | <3σqand |q −mψ| <3σq,
espec i ely, whe e mJ/ψ and mψa e he accep ed masses [34].
The a e age alue o σqis abou 26 MeV. The signal sample is
composed o he e en s ha a e no assigned o he J/ψ and ψ
samples.
The signal sample s ill con ains con ibu ions om he con-
ol samples, mainly due o un econs uc ed so pho ons in he
cha monium decay. These e en s will ha e a low q alue and all
ou side he selec ion desc ibed abo e. These e en s will also ha e
a low m alue and he e o e hey can be selec i ely emo ed us-
ing a combined selec ion on qand m. Fo q <mJ/ψ (q >mJ/ψ ),
we equi e |(m −mB0) −(q −mJ/ψ )| >160 (60)MeV. Fo q <mψ
(q >mψ), we equi e |(m −mB0) −(q −mψ)| >60 (30)MeV. The
equi emen s a e se such ha less han 10% o he backg ound
e en s o igina e om he con ol channels.
The ou - ack e ex candida e is iden ified as a B0o B0de-
pending on whe he he K+π−o K−π+in a ian mass is closes
o he accep ed K∗0mass. The ac ion o candida es assigned o
he inco ec s a e is es ima ed om simula ions o be 12–14%,
depending on q2.
The global efficiency, , is he p oduc o he accep ance and
he combined igge , econs uc ion, and selec ion efficiency, bo h
o which a e ob ained om Mon e Ca lo (MC) simula ions. The pp
collisions a e simula ed using py hia [35] e sion 6.424, he un-
s able pa icles a e decayed by e gen [36] e sion 9.1 (using he
de aul ma ix elemen o he signal), and he pa icles a e p op-
aga ed h ough a de ailed model o he de ec o wi h Gean 4[37].
The econs uc ion and selec ion o he gene a ed e en s p oceed
as o da a. Th ee simula ed samples we e c ea ed in which he B0
was o ced o decay o K∗0(K+π−)μ+μ−, J/ψ(μ+μ−)K∗0(K+π−),
o ψ(μ+μ−)K∗0(K+π−). The samples we e cons uc ed o ensu e
ha he numbe and spa ial dis ibu ion o pp collision e ices in
each e en ma ch he dis ibu ions ound in da a. The accep ance
is ob ained om gene a ed e en s, be o e he pa icle p opaga ion
wi h Gean 4, and is calcula ed as he ac ion o e en s passing
he single-muon equi emen o pT(μ) >3.3 GeV and |η(μ)| <2.3
ela i e o all e en s wi h pT(B0) >8 GeV and |η(B0)| <2.2. As
he accep ance equi emen s a e placed on he gene a ed quan i-
ies, hey a e less es ic i e han he final selec ion equi emen s,
which a e based on he econs uc ed quan i ies, o allow o he
e ec o fini e esolu ion. Only e en s passing he accep ance c i-
e ia a e p ocessed h ough he gean simula ion, he igge sim-
ula ion, and he econs uc ion so wa e. The combined igge , e-
cons uc ion, and selec ion efficiency is he a io o he numbe o
e en s ha pass he igge and selec ion equi emen s and ha e
a econs uc ed B0compa ible wi h he gene a ed B0in he e en ,
ela i e o he numbe o e en s ha pass he accep ance c i e-
ia. The compa ibili y o gene a ed and econs uc ed pa icles is
en o ced by equi ing he econs uc ed K+, π−, μ+, and μ− o
ha e (η)2+(ϕ)2less han 0.3 (0.004) o had ons (muons),
whe e ηand ϕa e he di e ences in ηand ϕbe ween he
econs uc ed and gene a ed pa icles. Requi ing all ou pa icles
in he B0decay o be ma ched esul s in an efficiency o 99.6%
426 CMS Collabo a ion / Physics Le e s B 753 (2016) 424–448
Fig. 1. Ske ch showing he defini ion o he angula obse ables θl(le ), θK(middle), and φ( igh ) o he decay B0→K∗0(K+π−)μ+μ−.
(0.4% o he e en s ha e a co ec ly econs uc ed B0 ha is no
ma ched o a gene a ed B0) and a pu i y o 99.5% (0.5% o he
ma ched candida es a e no a co ec ly econs uc ed B0). Efficien-
cies a e de e mined o bo h co ec ly agged ( he K and πha e
he co ec cha ge) and mis agged ( he K and πcha ges a e e-
e sed) candida es.
4. Analysis me hod
This analysis measu es AFB, FL, and dB/dq2o he decay B0→
K∗0μ+μ−as a unc ion o q2. Fig. 1 shows he angula obse -
ables needed o define he decay: θKis he angle be ween he kaon
momen um and he di ec ion opposi e o he B0B0in he K∗0
K∗0 es ame, θlis he angle be ween he posi i e (nega i e)
muon momen um and he di ec ion opposi e o he B0B0in he
dimuon es ame, and φis he angle be ween he plane con ain-
ing he wo muons and he plane con aining he kaon and pion.
As he ex ac ed angula pa ame e s AFB and FLdo no depend on
φand he p oduc o he accep ance and efficiency is nea ly con-
s an as a unc ion o φ, he angle φis in eg a ed ou . Al hough
he K+π−in a ian mass mus be consis en wi h ha o a K∗0,
he e can be a con ibu ion om spinless (S-wa e) K+π−combi-
na ions [24,38–40]. This is pa ame ized wi h wo e ms: FS, which
is ela ed o he S-wa e ac ion, and AS, which is he in e e -
ence ampli ude be ween he S-wa e and P-wa e decays. Including
his componen , he angula dis ibu ion o B0→K∗0μ+μ−can be
w i en as [24]:
1

d3
dcosθKdcosθldq2
=9
16 2
3FS+AScosθK1−cos2θl
+(1−FS)2FLcos2θK1−cos2θl
+1
2(1−FL)1−cos2θK1+cos2θl
+4
3AFB 1−cos2θKcosθl.(1)
Fo each q2bin, he obse ables o in e es a e ex ac ed om
an unbinned ex ended maximum-likelihood fi o h ee a iables:
he K+π−μ+μ−in a ian mass mand he wo angula a iables
θKand θl. Fo each q2bin, he unno malized p obabili y densi y
unc ion (PDF) has he ollowing exp ession:
PDF(m,θ
K,θ
l)=YC
SSC(m)Sa(θK,θ
l)C(θK,θ
l)
+ M
1− MSM(m)Sa(−θK,−θl)M(θK,θ
l)
+YBBm(m)BθK(θK)Bθl(θl), (2)
whe e he con ibu ions co espond o co ec ly agged signal
e en s, mis agged signal e en s, and backg ound e en s. The pa-
ame e s YC
Sand YBa e he yields o co ec ly agged signal e en s
and backg ound e en s, espec i ely, and a e ee pa ame e s in
he fi . The pa ame e Mis he ac ion o signal e en s ha a e
mis agged and is de e mined om MC simula ion. The signal mass
p obabili y unc ions SC(m)and SM(m)a e each he sum o wo
Gaussian unc ions and desc ibe he mass dis ibu ion o co ec ly
agged and mis agged signal e en s, espec i ely. In he fi , he e
is one ee pa ame e o he mass alue in bo h signal unc ions,
while he o he pa ame e s ( ou Gaussian σpa ame e s and wo
ac ions ela ing he con ibu ion o each Gaussian) a e ob ained
om MC simula ion, which has been ound o accu a ely ep o-
duce he da a. The unc ion Sa(θK, θl)desc ibes he signal in he
wo-dimensional (2D) space o he angula obse ables and co -
esponds o Eq. (1). The combina ion Bm(m) BθK(θK) Bθl(θl)is ob-
ained om B0sideband da a and desc ibes he backg ound in he
space o (m, θK, θl), whe e he mass dis ibu ion is an exponen-
ial unc ion and he angula dis ibu ions a e polynomials anging
om second o ou h deg ee, depending on he q2bin and he
angula a iable. The unc ions C(θK, θl)and M(θK, θl)a e he e -
ficiencies in he 2D space o −1 ≤cos θK≤1, −1 ≤cos θl≤1 o
co ec ly agged and mis agged signal e en s, espec i ely. The e -
ficiency unc ion o co ec ly agged e en s is ob ained om a fi
o he 2D-binned efficiency om simula ion and is cons ained o
be posi i e. The e a e 30 bins (5 in cosθKand 6 in cosθl), and he
efficiency fi unc ion is a polynomial o hi d deg ee in cosθKand
fi h deg ee in cosθl(and all c oss e ms), o a o al o 24 ee pa-
ame e s. This p ocedu e does no wo k o he mis agged e en s
because o he much smalle numbe o e en s ( esul ing in emp y
bins) and a mo e complica ed efficiency. Fo mis agged e en s, he
2D efficiency is calcula ed in 5×5bins o cos θKand cos θl, and
an in e pola ion is pe o med. This in e pola ion unc ion is used
o gene a e a new binned efficiency (in 120 ×120 bins), wi h all
bin con en s cons ained o be nonnega i e. The efficiency unc ion
uses his finely binned efficiency, wi h linea in e pola ion be ween
bins. The efficiencies o bo h co ec ly agged and mis agged
e en s peak a cosθlnea 0 o q2<10 GeV2, becoming fla o
la ge alues o q2. The efficiency o co ec ly agged e en s ends
o dec ease wi h inc easing cosθK, and o q2>14 GeV2a small
dec ease is seen o cosθKnea −1. The efficiency o mis agged
e en s is maximal nea cosθK=0, wi h an inc ease as cosθKap-
p oaches +1 ha becomes mo e p onounced as q2inc eases.
The fi is pe o med in wo s eps. The ini ial fi uses he da a
om he sidebands o he B0mass o ob ain he BθK(θK)and
Bθl(θl)dis ibu ions ( he signal componen is absen om his fi ).
The sideband egions a e 3σm<|m −mB0| <5.5σm, whe e σmis
he a e age mass esolu ion (≈45 MeV), ob ained om fi ing he
MC simula ion signal o a sum o wo Gaussians wi h a common
mean. The dis ibu ions ob ained in his s ep a e hen fixed o he
second s ep, which is a fi o he da a o e he ull mass ange. The
ee pa ame e s in his fi a e AFB, FL, FS, AS, he pa ame e s in
CMS Collabo a ion / Physics Le e s B 753 (2016) 424–448 427
Bm(m), he mass pa ame e in SC(m)and SM(m), and he yields
YC
Sand YB. In addi ion, he emaining pa ame e s in SC(m)and
SM(m)a e ee pa ame e s wi h Gaussian cons ain s om p e i-
ous fi s o simula ed signal e en s.
The PDF in Eq. (2) is only gua an eed o be nonnega i e o
pa icula anges o AFB, FL, AS, and FS. While he defini ion o
he p ecise physical egion is a mo e complica ed exp ession, he
app oxima e anges o alidi y a e: 0 <FL<1, |AFB| <3
4(1−FL),
0 <FS<min3(1−FL)
1+3FL,1, and |AS| <FS+3FL(1−FS). In addi-
ion, he in e e ence e m ASmus anish i ei he o he wo
in e e ing componen s anish. F om Re . [24], his cons ain is
implemen ed as |AS| <√12FS(1−FS)FLR, whe e Ris a a io e-
la ed o he S-wa e and P-wa e line shapes, es ima ed o be 0.89
nea he K∗0mass. Du ing he minui [41] minimiza ion, penal y
e ms a e in oduced o ensu e ha pa ame e s emain in he
physical egion. When assessing he s a is ical unce ain ies wi h
Minos [41], he penal y e ms a e emo ed. Howe e , a nega i e
alue o Eq. (2) esul s in he minimizing algo i hm gene a ing a
la ge posi i e jump in he nega i e log-likelihood, ending o e-
mo e he unphysical egion. The esul s o he fi in each signal q2
bin a e AFB, FL, AS, FS, and he co ec ly agged signal yield YC
S.
The di e en ial b anching ac ion, dB/dq2, is measu ed ela i e
o he no maliza ion channel B0→J/ψK∗0using:
dBB0→K∗0μ+μ−
dq2
=YC
S
C+YC
S M
(1− M)MYC
N
C
N+YC
N M
N
(1− M
N)M
N−1
×
BB0→J/ψK∗0
q2,(3)
whe e YC
Sand YC
Na e he yields o he co ec ly agged signal and
no maliza ion channels, espec i ely; C
Sand C
Na e he efficiencies
o he co ec ly agged signal and no maliza ion channels, espec-
i ely; Mand M
Na e he mis ag a es o he signal and no mal-
iza ion channels, espec i ely; M
Sand M
Na e he efficiencies o
he mis agged signal and no maliza ion channels, espec i ely; and
BB0→J/ψ(μ+μ−)K∗0=0.132% ×5.96% is he accep ed b anch-
ing ac ion o he no maliza ion channel [34], co esponding o
he q2bin q2=8.68–10.09 GeV2. The efficiencies a e ob ained
by in eg a ing he efficiency unc ions o e he angula a iables,
weigh ed by he decay a e in Eq. (1), using he alues ob ained
om he fi o Eq. (2) o he da a.
The fi o malism and esul s a e alida ed h ough fi s o
pseudo-expe imen al samples, MC simula ion samples, and con ol
channels. Addi ional de ails, including he sizes o he sys ema ic
unce ain ies assigned om hese fi s, a e desc ibed in Sec ion 5.
5. Sys ema ic unce ain ies
Since he efficiency is compu ed wi h simula ed e en s, i is es-
sen ial ha he MC simula ion p og am co ec ly ep oduces he
da a, and ex ensi e checks ha e been pe o med o e i y he ac-
cu acy o he simula ion. The sys ema ic unce ain ies associa ed
wi h he efficiencies, and o he sou ces o sys ema ic unce ain y
a e desc ibed below and summa ized in Table 1.
The co ec ness o he fi unc ion and he p ocedu e o mea-
su ing he a iables o in e es a e e ified in h ee ways. Fi s ,
a high-s a is ics MC sample (app oxima ely 400 imes ha o he
da a) is used o e i y ha he fi ing p ocedu e p oduces esul s
consis en wi h he inpu alues o he simula ion. This MC sample
includes he ull simula ion o signal and con ol channel e en s
Table 1
Sys ema ic unce ain y con ibu ions o he measu emen s o FL, AFB, and he
b anching ac ion o he decay B0→K∗0μ+μ−. The alues o FLand AFB a e
absolu e, while he alues o he b anching ac ion a e ela i e. The o al unce -
ain y in each q2bin is ob ained by adding each con ibu ion in quad a u e. Fo
each i em, he ange indica es he a ia ion o he unce ain y in he signal q2bins.
Sys ema ic unce ain y FL(10−3)AFB(10−3)dB/dq2(%)
Simula ion mismodeling 1–17 0–37 1.0–5.5
Fi bias 0–34 2–42 –
MC s a is ical unce ain y 3–10 5–18 0.5–2.0
Efficiency 34 5 –
Kπmis agging 1–4 0–7 0.1–4.1
Backg ound dis ibu ion 20–36 12–31 0.0–1.2
Mass dis ibu ion 3 1 3.2
Feed- h ough backg ound 0–27 0–5 0.0–4.0
Angula esolu ion 6–24 0–5 0.2–2.1
No maliza ion o B0→J/ψK∗0–– 4.6
To al sys ema ic unce ain y 41–65 18–74 6.4–8.6
plus backg ound e en s ob ained om he PDF in Eq. (2). The dis-
c epancy be ween he inpu and ou pu alues in his check is
assigned as a simula ion mismodeling sys ema ic unce ain y. I
was also e ified ha fi ing a sample wi h only mis agged e en s
gi es he co ec esul s. Second, 1000 pseudo-expe imen s, each
wi h he same numbe o e en s as he da a sample, a e gen-
e a ed in each q2bin using he PDF in Eq. (2), wi h pa ame e s
ob ained om he fi o he da a. These a e used o es ima e he
fi bias. Much o he obse ed bias is a consequence o he fi ed
pa ame e s lying close o he bounda ies o he physical egion. In
addi ion, he dis ibu ions o esul s a e used o check he e u ned
s a is ical unce ain y om he fi and a e ound o be consis-
en . Thi d, he high-s a is ics MC signal sample is di ided in o
400 subsamples and combined wi h backg ound e en s o mimic
400 independen da a se s o simila size o he da a. Fi s o hese
400 samples do no e eal any addi ional sys ema ic unce ain y.
Because he efficiency unc ions a e es ima ed om a fini e
numbe o simula ed e en s, he e is a co esponding s a is ical
unce ain y in he efficiency. The efficiency unc ions a e ob ained
om fi s o simula ed da a. Al e na i es o he de aul efficiency
unc ion a e gene a ed by andomly a ying he fi ed pa ame e s
wi hin hei unce ain ies (including all co ela ions). The e ec o
hese di e en efficiency unc ions on he final esul is used o
es ima e he sys ema ic unce ain y.
The main check o he co ec ness o he efficiency is ob ained
by compa ing he efficiency-co ec ed esul s o he con ol chan-
nels wi h he co esponding wo ld-a e age alues. The efficiency
as a unc ion o he angula a iables is checked by compa ing he
FLand AFB measu emen s om he B0→J/ψK∗0sample, com-
posed o 165 000 signal e en s. The alue o FLob ained in his
analysis is 0.537 ±0.002 (s a ), compa ed wi h he wo ld-a e age
alue o 0.571 ±0.007 (s a +sys )[34], indica ing a disc epancy
o 0.034, which is aken as he sys ema ic unce ain y o he sig-
nal measu emen s o FL. Fo AFB, he measu ed alue is 0.008 ±
0.003 (s a ), compa ed o a SM expec a ion o ≈0. Adding an S-
wa e con ibu ion in he fi changes he measu ed alue o AFB
by less han 0.001. F om his, we conclude ha he S-wa e e ec s
a e minimal, and assign a sys ema ic unce ain y o 0.005 o AFB.
To alida e ha he simula ion accu a ely ep oduces he efficiency
as a unc ion o q2, we measu e he b anching a io be ween wo
di e en q2bins, namely he wo con ol channels. The b anching
a io esul , BB0→ψK∗0/BB0→J/ψK∗0=0.479 ±0.005, is
in excellen ag eemen wi h he mos p ecise epo ed measu e-
men : 0.476 ±0.014 (s a ) ±0.010 (sys )[42].
The PDF used in he analysis accommoda es cases in which
he kaon and pion cha ges a e co ec ly and inco ec ly assigned.
Bo h o hese con ibu ions a e ea ed as signal. The mis ag ac-
428 CMS Collabo a ion / Physics Le e s B 753 (2016) 424–448
ion is fixed o he alue ob ained om MC simula ion. In he
high-s a is ics con ol channel B0→J/ψK∗0, he mis ag ac ion is
allowed o floa in he fi and a alue o M=(14.5 ±0.5)%is
ound, o be compa ed o he simula ed alue o (13.7 ±0.1)%. The
e ec o his 5.8% di e ence in he mis ag ac ion on he mea-
su ed alues is aken as a sys ema ic unce ain y.
The sys ema ic unce ain y associa ed wi h he unc ions used
o model he angula dis ibu ion o he backg ound is ob ained
om he sum in quad a u e o wo unce ain ies. The fi s unce -
ain y is e alua ed by fi ing he backg ound wi h polynomials o
one deg ee g ea e han used in he de aul analysis and aking he
di e ence in he obse ables o in e es be ween hese wo fi s as
he sys ema ic unce ain y. The second unce ain y is owing o he
s a is ical unce ain y in he backg ound shape, as hese shapes a e
fixed in he final fi . This unce ain y is ob ained by aking he
di e ence in quad a u e be ween he e u ned s a is ical unce -
ain ies on he pa ame e s o in e es when he backg ound shapes
a e fixed and allowed o a y. In q2bins whe e he uncons ained
fi does no con e ge, he associa ed unce ain y is ob ained om
ex apola ion o nea by bins.
The mass dis ibu ions o he co ec ly agged and mis agged
e en s a e each desc ibed by he sum o wo Gaussian unc ions,
wi h a common mean o all ou Gaussian unc ions. The mean
alue is ob ained om he fi o he da a, while he o he pa ame-
e s ( ou σand wo a ios) a e ob ained om fi s o MC-simula ed
e en s, wi h he unce ain y om hose fi s used as Gaussian con-
s ain s in he fi s o he da a. Fo he high-s a is ics con ol chan-
nels, i is possible o fi he da a, while allowing some o he
pa ame e s o a y. The maximum changes in he measu ed al-
ues in he wo con ol channel q2bins when he pa ame e s a e
a ied a e aken as he sys ema ic unce ain y o all q2bins.
The q2bins jus below and abo e he J/ψ egion may be con-
amina ed wi h B0→J/ψK∗0 eed- h ough e en s ha a e no
emo ed by he selec ion c i e ia. A special fi in hese wo bins
is made, in which an addi ional backg ound e m is added o he
PDF. This backg ound dis ibu ion is ob ained om he MC simu-
la ion and he backg ound yield is a ee pa ame e . The esul ing
changes in he fi pa ame e s a e used as es ima es o he sys em-
a ic unce ain y associa ed wi h his con ibu ion.
The e ec s om angula esolu ion in he econs uc ed alues
o he angula a iables θKand θla e es ima ed by pe o ming
wo fi s on he same MC-simula ed e en s. One fi uses he ue
alues o he angula a iables and he o he fi hei econs uc ed
alues. The di e ence in he fi ed pa ame e s be ween he wo fi s
is aken as an es ima e o he sys ema ic unce ain y.
The di e en ial b anching ac ion has an addi ional sys ema ic
unce ain y o 4.6% coming om he unce ain y in he b anching
ac ion o he no maliza ion mode B0→J/ψK∗0.
The sys ema ic unce ain ies a e measu ed and applied in each
q2bin, wi h he o al sys ema ic unce ain y ob ained by adding
he indi idual con ibu ions in quad a u e.
6. Resul s
The signal da a, co esponding o 1430 signal e en s, a e fi in
se en disjoin q2bins om 1 o 19 GeV2. Resul s a e also ob ained
o a wide, low-q2bin (1 <q2<6GeV
2), whe e he heo e ical
unce ain ies a e bes unde s ood. The K+π−μ+μ−in a ian mass
dis ibu ions o all o he q2signal bins, as well as he fi p ojec-
ions, a e shown in Fig. 2. Fig. 3 plo s he p ojec ions o he fi
and he da a on he cosθK( op) and cosθl(bo om) axes o he
combined low-q2bin (le , 1 <q2<6GeV
2) and he highes q2
bin ( igh , 16 <q2<19 GeV2). The fi ed alues o signal yield,
FL, AFB, and dB/dq2, along wi h hei associa ed unce ain ies, a e
gi en o each o he disjoin q2 egions in Table 2. These esul s
a e also shown in Fig. 4, along wi h wo SM p edic ions. The fi ed
alues o FSa e all less han 0.03, while he alues o AS a y
om −0.3 o +0.3.
The SM p edic ions, de i ed om Re s. [18,20], combine wo
calcula ional echniques. In he low-q2 egion, a quan um ch omo-
dynamic ac o iza ion app oach [43] is used, which is applicable
o q2<4m2
c, whe e mcis he cha m qua k mass. In he high-q2
egion, an ope a o p oduc expansion in he in e se bqua k mass
and 1/
q2[44,45] is combined wi h hea y-qua k o m- ac o e-
la ions [46]. This is alid abo e he open-cha m h eshold (q2
13.9GeV
2). The wo SM p edic ions shown in Fig. 4 di e in he
calcula ion o he o m ac o s. The ligh -cone sum ules (LCSR)
calcula ion is made a low q2[47] and is ex apola ed o high
q2[48]. The la ice gauge (La ice) calcula ion o he o m ac o s
is om Re . [49]. Con olled heo e ical p edic ions a e no a ail-
able nea he J/ψ and ψ esonances. The SM p edic ions a e in
good ag eemen wi h he CMS expe imen al esul s, indica ing no
s ong con ibu ion om physics beyond he s anda d model.
The esul s desc ibed a e combined wi h p e ious CMS mea-
su emen s, ob ained om an independen da a sample collec ed a
√s=7TeV[29]. The sys ema ic unce ain ies associa ed wi h he
efficiency, Kπmis agging, mass dis ibu ion, angula esolu ion,
and he B0→J/ψK∗0b anching ac ion a e assumed o be ully
co ela ed be ween he wo samples, wi h he emaining unce -
ain ies assumed o be unco ela ed. To combine he esul s om
he 7TeV and 8TeV da a, he unco ela ed sys ema ic unce ain-
ies a e combined in quad a u e wi h he s a is ical unce ain ies.
To accoun o he asymme ic unce ain ies, he linea a iance
me hod om Re . [50] is used o a e age he 7TeV and 8TeV mea-
su emen s, as well as o a e age he wo q2bins co e ing 4.30 o
8.68 GeV2, which was a single bin in he 7TeV analysis. A e he
combina ion, he co ela ed sys ema ic unce ain ies a e added in
quad a u e. The combined CMS measu emen s o AFB, FL, and he
di e en ial b anching ac ion e sus q2a e compa ed o p e ious
measu emen s [26–29,51,52] in Fig. 5. The CMS measu emen s a e
consis en wi h he o he esul s, wi h compa able o highe p eci-
sion. Table 3 p o ides a compa ison o he measu ed quan i ies in
he low dimuon in a ian mass egion: 1 <q2<6GeV
2, as well as
he co esponding heo e ical calcula ions.
7. Summa y
Using pp collision da a eco ded a √s=8TeVwi h he CMS
de ec o a he LHC, co esponding o an in eg a ed luminosi y o
20.5 b−1, an angula analysis has been ca ied ou on he decay
B0→K∗0μ+μ−. The da a used o his analysis include 1430 sig-
nal decays. Fo each bin o he dimuon in a ian mass squa ed
(q2), unbinned maximum-likelihood fi s we e pe o med o he
dis ibu ions o he K+π−μ+μ−in a ian mass and wo decay an-
gles, o ob ain alues o he o wa d–backwa d asymme y o he
muons, AFB, he ac ion o longi udinal pola iza ion o he K∗0,
FL, and he di e en ial b anching ac ion, dB/dq2. The esul s a e
among he mos p ecise o da e and a e consis en wi h s anda d
model p edic ions and p e ious measu emen s.
Acknowledgemen s
We cong a ula e ou colleagues in he CERN accele a o depa -
men s o he excellen pe o mance o he LHC and hank he
echnical and adminis a i e s a s a CERN and a o he CMS in-
s i u es o hei con ibu ions o he success o he CMS e o .
In addi ion, we g a e ully acknowledge he compu ing cen e s and
pe sonnel o he Wo ldwide LHC Compu ing G id o deli e ing so
e ec i ely he compu ing in as uc u e essen ial o ou analyses.

CMS Collabo a ion / Physics Le e s B 753 (2016) 424–448 429
Fig. 2. The K+π−μ+μ−in a ian mass dis ibu ions o he se en signal q2bins and he combined 1 <q2<6GeV
2bin. O e laid on each is he p ojec ion o he esul s
o he o al fi , as well as he h ee componen s: co ec ly agged signal, mis agged signal, and backg ound. The e ical ba s gi e he s a is ical unce ain ies, he ho izon al
ba s he bin wid hs.
Finally, we acknowledge he endu ing suppo o he cons uc-
ion and ope a ion o he LHC and he CMS de ec o p o ided
by he ollowing unding agencies: BMWFW and FWF (Aus ia);
Fonds De La Reche che Scien ifique - FNRS and FWO (Belgium);
CNPq, CAPES, FAPERJ, and FAPESP (B azil); MES (Bulga ia); CERN;
CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES and
CSF (C oa ia); RPF (Cyp us); MoER, ERC IUT and ERDF (Es onia);
Academy o Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3
(F ance); BMBF, DFG, and HGF (Ge many); GSRT (G eece); OTKA
and NIH (Hunga y); DAE and DST (India); IPM (I an); SFI (I eland);
430 CMS Collabo a ion / Physics Le e s B 753 (2016) 424–448
Fig. 3. Da a and fi esul s o 1 <q2<6GeV
2(le ) and 16 <q2<19 GeV2( igh ), p ojec ed on o he cosθKaxis ( op), and cosθlaxis (bo om). The fi esul s show he
o al fi , as well as he h ee componen s: co ec ly agged signal, mis agged signal, and backg ound. The e ical ba s gi e he s a is ical unce ain ies, he ho izon al ba s
he bin wid hs.
Table 2
The measu ed alues o signal yield (including bo h co ec ly agged and mis agged e en s), FL, AFB, and di e en ial
b anching ac ion o he decay B0→K∗0μ+μ−in bins o q2. The fi s unce ain y is s a is ical and he second (when
p esen ) is sys ema ic. The bin anges a e selec ed o allow compa isons o p e ious measu emen s.
q2
(GeV2)
Signal
yield
FLAFB dB/dq2
(10−8GeV−2)
1.00–2.00 84 ±11 0.64 +0.10
−0.09 ±0.07 −0.27 +0.17
−0.40 ±0.07 4.6±0.7±0.3
2.00–4.30 145 ±16 0.80 ±0.08 ±0.06 −0.12 +0.15
−0.17 ±0.05 3.3±0.5±0.2
4.30–6.00 117 ±15 0.62 +0.10
−0.09 ±0.07 0.01 ±0.15 ±0.03 3.4±0.5±0.3
6.00–8.68 254 ±21 0.50 ±0.06 ±0.06 0.03 ±0.10 ±0.02 4.7±0.4±0.3
10.09–12.86 362 ±25 0.39 ±0.05 ±0.04 0.16 ±0.06 ±0.01 6.2±0.4±0.5
14.18–16.00 225 ±18 0.48 +0.05
−0.06 ±0.04 0.39 +0.04
−0.06 ±0.01 6.7±0.6±0.5
16.00–19.00 239 ±18 0.38 +0.05
−0.06 ±0.04 0.35 ±0.07 ±0.01 4.2±0.3±0.3
Table 3
Measu emen s om CMS ( he 7TeV esul s [29], his wo k o 8TeV, and he combina ion), LHCb [28], BaBa [52], CDF [27,
51], and Belle [26] o FL, AFB, and dB/dq2in he egion 1 <q2<6GeV
2 o he decay B0→K∗0μ+μ−. The CMS and
LHCb esul s a e om B0→K∗0μ+μ−decays. The emaining expe imen s add he co esponding B+decay, and he BaBa
and Belle expe imen s also include he dielec on mode. The fi s unce ain y is s a is ical and he second is sys ema ic.
Fo he combined CMS esul s, only he o al unce ain y is epo ed. The wo SM p edic ions a e also gi en.
Expe imen FLAFB dB/dq2(10−8GeV−2)
CMS (7 TeV) 0.68 ±0.10 ±0.02 −0.07 ±0.12 ±0.01 4.4±0.6±0.4
CMS (8 TeV, his analysis) 0.73 ±0.05 ±0.04 −0.16 +0.10
−0.09 ±0.05 3.6±0.3±0.2
CMS (7 TeV +8TeV) 0.72 ±0.06 −0.12 ±0.08 3.8±0.4
LHCb 0.65 +0.08
−0.07 ±0.03 −0.17 ±0.06 ±0.01 3.4±0.3+0.4
−0.5
BaBa – – 4.1+1.1
−1.0±0.1
CDF 0.69 +0.19
−0.21 ±0.08 0.29 +0.20
−0.23 ±0.07 3.2±1.1±0.3
Belle 0.67 ±0.23 ±0.05 0.26 +0.27
−0.32 ±0.07 3.0+0.9
−0.8±0.2
SM (LCSR) 0.79 +0.09
−0.12 −0.02 +0.03
−0.02 4.6+2.3
−1.7
SM (La ice) 0.73 +0.08
−0.10 −0.03 +0.04
−0.03 3.8+1.2
−1.0
CMS Collabo a ion / Physics Le e s B 753 (2016) 424–448 431
Fig. 4. Measu ed alues o FL, AFB, and dB/dq2 e sus q2 o B0→K∗0μ+μ−. The
s a is ical unce ain y is shown by he inne e ical ba s, while he ou e e ical
ba s gi e he o al unce ain y. The ho izon al ba s show he bin wid hs. The e ical
shaded egions co espond o he J/ψ and ψ esonances. The o he shaded egions
show he wo SM p edic ions a e a e a e aging ac oss he q2bins o p o ide a
di ec compa ison o he da a. Con olled heo e ical p edic ions a e no a ailable
nea he J/ψ and ψ esonances.
INFN (I aly); MSIP and NRF (Republic o Ko ea); LAS (Li huania);
MOE and UM (Malaysia); CINVESTAV, CONACYT, SEP, and UASLP-
FAI (Mexico); MBIE (New Zealand); PAEC (Pakis an); MSHE and
NSC (Poland); FCT (Po ugal); JINR (Dubna); MON, RosA om, RAS
and RFBR (Russia); MESTD (Se bia); SEIDI and CPAN (Spain); Swiss
Funding Agencies (Swi ze land); MST (Taipei); ThEPCen e , IPST,
STAR and NSTDA (Thailand); TUBITAK and TAEK (Tu key); NASU
and SFFR (Uk aine); STFC (Uni ed Kingdom); DOE and NSF (USA).
Indi iduals ha e ecei ed suppo om he Ma ie-Cu ie p o-
g am and he Eu opean Resea ch Council and EPLANET (Eu opean
Union); he Le en is Founda ion; he A.P. Sloan Founda ion; he
Alexande on Humbold Founda ion; he Belgian Fede al Science
Policy Office; he Fonds pou la Fo ma ion à la Reche che dans
l’Indus ie e dans l’Ag icul u e (FRIA-Belgium); he Agen schap
oo Inno a ie doo We enschap en Technologie (IWT-Belgium);
he Minis y o Educa ion, You h and Spo s (MEYS) o he Czech
Republic; he Council o Science and Indus ial Resea ch, India; he
Fig. 5. Measu ed alues o FL, AFB, and dB/dq2 e sus q2 o B0→K∗0μ+μ− om
CMS (combina ion o he 7TeV[29] esul s and his analysis), Belle [26], CDF [27,
51], BaBa [52], and LHCb [28]. The CMS and LHCb esul s a e om B0→K∗0μ+μ−
decays. The emaining expe imen s add he co esponding B+decay, and he BaBa
and Belle expe imen s also include he dielec on mode. The e ical ba s gi e he
o al unce ain y. The ho izon al ba s show he bin wid hs. The ho izon al posi ions
o he da a poin s a e s agge ed o imp o e legibili y. The e ical shaded egions
co espond o he J/ψ and ψ esonances.
HOMING PLUS p og am o he Founda ion o Polish Science, co-
financed om Eu opean Union, Regional De elopmen Fund; he
Compagnia di San Paolo (To ino); he Conso zio pe la Fisica (T i-
es e); MIUR p ojec 20108T4XTM (I aly); he Thalis and A is eia
p og ams cofinanced by EU-ESF and he G eek NSRF; he Na ional
P io i ies Resea ch P og am by Qa a Na ional Resea ch Fund; he
Rachadapisek Sompo Fund o Pos doc o al Fellowship, Chula-
longko n Uni e si y (Thailand); and he Welch Founda ion.
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M. Pe uzzi, A. Pe illi, G. Pe ucciani, A. P ei e , D. Pipa o, A. Racz, G. Rolandi 41, M. Ro e e, M. Ruan,
H. Sakulin, C. Schä e , C. Schwick, A. Sha ma, P. Sil a, M. Simon, P. Sphicas 42, D. Spiga, J. S eggemann,
B. S iege , M. S oye, Y. Takahashi, D. T eille, A. T iossi, A. Tsi ou, G.I. Ve es 20, N. Wa dle, H.K. Wöh i,
A. Zagozdzinska 43, W.D. Zeune
CERN, Eu opean O ganiza ion o Nuclea Resea ch, Gene a, Swi ze land
W. Be l, K. Dei e s, W. E dmann, R. Ho isbe ge , Q. Ing am, H.C. Kaes li, D. Ko linski, U. Langenegge ,
D. Renke , T. Rohe
Paul Sche e Ins i u , Villigen, Swi ze land
F. Bachmai , L. Bäni, L. Bianchini, M.A. Buchmann, B. Casal, G. Disse o i, M. Di ma , M. Donegà, P. Elle ,
C. G ab, C. Heidegge , D. Hi s, J. Hoss, G. Kasieczka, W. Lus e mann, B. Mangano, M. Ma ionneau,
P. Ma inez Ruiz del A bol, M. Mascio ecchio, D. Meis e , F. Micheli, P. Musella, F. Nessi-Tedaldi,
F. Pandolfi, J. Pa a, F. Pauss, L. Pe ozzi, M. Qui na , M. Rossini, A. S a odumo 44, M. Takahashi,
V.R. Ta ola o, K. Theofila os, R. Wallny
Ins i u e o Pa icle Physics, ETH Zu ich, Zu ich, Swi ze land
T.K. Aa es ad, C. Amsle 45, L. Caminada, M.F. Canelli, V. Chiochia, A. De Cosa, C. Galloni, A. Hinzmann,
T. H eus, B. Kilmins e , C. Lange, J. Ngadiuba, D. Pinna, P. Robmann, F.J. Ronga, D. Sale no, Y. Yang
Uni e si ä Zü ich, Zu ich, Swi ze land
442 CMS Collabo a ion / Physics Le e s B 753 (2016) 424–448
M. Ca daci, K.H. Chen, T.H. Doan, Sh. Jain, R. Khu ana, M. Konyushikhin, C.M. Kuo, W. Lin, Y.J. Lu,
R. Volpe, S.S. Yu
Na ional Cen al Uni e si y, Chung-Li, Taiwan
A un Kuma , R. Ba ek, P. Chang, Y.H. Chang, Y.W. Chang, Y. Chao, K.F. Chen, P.H. Chen, C. Die z, F. Fio i,
U. G undle , W.-S. Hou, Y. Hsiung, Y.F. Liu, R.-S. Lu, M. Miñano Moya, E. Pe akou, J.F. Tsai, Y.M. Tzeng
Na ional Taiwan Uni e si y (NTU), Taipei, Taiwan
B. Asa apibhop, K. Ko i anggoon, G. Singh, N. S imanobhas, N. Suwonjandee
Chulalongko n Uni e si y, Facul y o Science, Depa men o Physics, Bangkok, Thailand
A. Adiguzel, M.N. Baki ci 46, Z.S. Demi oglu, C. Dozen, I. Dumanoglu, E. Esku , S. Gi gis, G. Gokbulu ,
Y. Gule , E. Gu pina , I. Hos, E.E. Kangal 47, G. Onengu 48, K. Ozdemi 49, A. Pola oz, D. Suna Ce ci 50,
M. Ve gili, C. Zo bilmez
Cuku o a Uni e si y, Adana, Tu key
I.V. Akin, B. Bilin, S. Bilmis, B. Isildak 51, G. Ka apina 52, M. Yal ac, M. Zey ek
Middle Eas Technical Uni e si y, Physics Depa men , Anka a, Tu key
E.A. Albay ak 53, E. Gülmez, M. Kaya 54, O. Kaya 55, T. Ye kin 56
Bogazici Uni e si y, Is anbul, Tu key
K. Cankocak, S. Sen 57, F.I. Va da lı
Is anbul Technical Uni e si y, Is anbul, Tu key
B. G ynyo
Ins i u e o Scin illa ion Ma e ials o Na ional Academy o Science o Uk aine, Kha ko , Uk aine
L. Le chuk, P. So okin
Na ional Scien ific Cen e , Kha ko Ins i u e o Physics and Technology, Kha ko , Uk aine
R. Aggle on, F. Ball, L. Beck, J.J. B ooke, E. Clemen , D. Cussans, H. Flache , J. Golds ein, M. G imes,
G.P. Hea h, H.F. Hea h, J. Jacob, L. K eczko, C. Lucas, Z. Meng, D.M. Newbold 58, S. Pa ames a an, A. Poll,
T. Sakuma, S. Sei El Nas -s o ey, S. Senkin, D. Smi h, V.J. Smi h
Uni e si y o B is ol, B is ol, Uni ed Kingdom
D. Ba ducci, K.W. Bell, A. Belyae 59, C. B ew, R.M. B own, D.J.A. Cocke ill, J.A. Coughlan, K. Ha de ,
S. Ha pe , E. Olaiya, D. Pe y , C.H. Shephe d-Themis ocleous, A. Thea, L. Thomas, I.R. Tomalin,
T. Williams, W.J. Wome sley, S.D. Wo m
Ru he o d Apple on Labo a o y, Didco , Uni ed Kingdom
M. Babe , R. Bainb idge, O. Buchmulle , A. Bundock, D. Bu on, S. Casasso, M. Ci on, D. Colling, L. Co pe,
N. C ipps, P. Dauncey, G. Da ies, A. De Wi , M. Della Neg a, P. Dunne, A. Elwood, W. Fe guson, J. Fulche ,
D. Fu yan, G. Hall, G. Iles, M. Kenzie, R. Lane, R. Lucas 58, L. Lyons, A.-M. Magnan, S. Malik, J. Nash,
A. Niki enko44, J. Pela, M. Pesa esi, K. Pe idis, D.M. Raymond, A. Richa ds, A. Rose, C. Seez, A. Tappe ,
K. Uchida, M. Vazquez Acos a 60, T. Vi dee, S.C. Zenz
Impe ial College, London, Uni ed Kingdom
J.E. Cole, P.R. Hobson, A. Khan, P. Kybe d, D. Legga , D. Leslie, I.D. Reid, P. Symonds, L. Teodo escu,
M. Tu ne
B unel Uni e si y, Uxb idge, Uni ed Kingdom
CMS Collabo a ion / Physics Le e s B 753 (2016) 424–448 443
A. Bo zou, K. Call, J. Di mann, K. Ha akeyama, A. Kasmi, H. Liu, N. Pas ika
Baylo Uni e si y, Waco, USA
O. Cha a , S.I. Coope , C. Hende son, P. Rume io
The Uni e si y o Alabama, Tuscaloosa, USA
A. A e isyan, T. Bose, C. Fan asia, D. Gas le , P. Lawson, D. Rankin, C. Richa dson, J. Rohl , J. S . John,
L. Sulak, D. Zou
Bos on Uni e si y, Bos on, USA
J. Alimena, E. Be y, S. Bha acha ya, D. Cu s, N. Dhing a, A. Fe apon o , A. Ga abedian, U. Hein z,
E. Lai d, G. Landsbe g, Z. Mao, M. Na ain, S. Pipe o , S. Sagi , T. Sin hup asi h, R. Sya i
B own Uni e si y, P o idence, USA
R. B eedon, G. B e o, M. Calde on De La Ba ca Sanchez, S. Chauhan, M. Che ok, J. Conway, R. Conway,
P.T. Cox, R. E bache , M. Ga dne , W. Ko, R. Lande , M. Mulhea n, D. Pelle , J. Pilo , F. Ricci-Tam,
S. Shalhou , J. Smi h, M. Squi es, D. S olp, M. T ipa hi, S. Wilbu , R. Yohay
Uni e si y o Cali o nia, Da is, Da is, USA
R. Cousins, P. E e ae s, C. Fa ell, J. Hause , M. Igna enko, D. Sal zbe g, E. Takasugi, V. Value , M. Webe
Uni e si y o Cali o nia, Los Angeles, USA
K. Bu , R. Cla e, J. Ellison, J.W. Ga y, G. Hanson, J. Heilman, M. I o a Pane a, P. Jandi , E. Kennedy,
F. Lac oix, O.R. Long, A. Lu h a, M. Malbe i, M. Olmedo Neg e e, A. Sh ini as, H. Wei, S. Wimpenny
Uni e si y o Cali o nia, Ri e side, Ri e side, USA
J.G. B anson, G.B. Ce a i, S. Ci olin, R.T. D’Agnolo, A. Holzne , R. Kelley, D. Klein, J. Le s, I. Macneill,
D. Oli i o, S. Padhi, M. Pie i, M. Sani, V. Sha ma, S. Simon, M. Tadel, A. Va ak, S. Wasse baech 61,
C. Welke, F. Wü hwein, A. Yagil, G. Ze i Della Po a
Uni e si y o Cali o nia, San Diego, La Jolla, USA
D. Ba ge, J. B admille -Feld, C. Campagna i, A. Dishaw, V. Du a, K. Flowe s, M. F anco Se illa, P. Ge e ,
C. Geo ge, F. Gol , L. Gouskos, J. G an, J. Incandela, C. Jus us, N. Mccoll, S.D. Mullin, J. Richman, D. S ua ,
I. Sua ez, W. To, C. Wes , J. Yoo
Uni e si y o Cali o nia, San a Ba ba a, San a Ba ba a, USA
D. Ande son, A. Ap esyan, A. Bo nheim, J. Bunn, Y. Chen, J. Dua e, A. Mo , H.B. Newman, C. Pena,
M. Pie ini, M. Spi opulu, J.R. Vliman , S. Xie, R.Y. Zhu
Cali o nia Ins i u e o Technology, Pasadena, USA
V. Azzolini, A. Calamba, B. Ca lson, T. Fe guson, M. Paulini, J. Russ, M. Sun, H. Vogel, I. Vo obie
Ca negie Mellon Uni e si y, Pi sbu gh, USA
J.P. Cumala , W.T. Fo d, A. Gaz, F. Jensen, A. Johnson, M. K ohn, T. Mulholland, U. Nauenbe g, K. S enson,
S.R. Wagne
Uni e si y o Colo ado Boulde , Boulde , USA
J. Alexande , A. Cha e jee, J. Cha es, J. Chu, S. Di me , N. Egge , N. Mi man, G. Nicolas Kau man,
J.R. Pa e son, A. Rinke icius, A. Ryd, L. Skinna i, L. Soffi, W. Sun, S.M. Tan, W.D. Teo, J. Thom,
J. Thompson, J. Tucke , Y. Weng, P. Wi ich
Co nell Uni e si y, I haca, USA
444 CMS Collabo a ion / Physics Le e s B 753 (2016) 424–448
S. Abdullin, M. Alb ow, J. Ande son, G. Apollina i, L.A.T. Baue dick, A. Be e as, J. Be yhill, P.C. Bha ,
G. Bolla, K. Bu ke , J.N. Bu le , H.W.K. Cheung, F. Chlebana, S. Cihangi , V.D. El i a, I. Fisk, J. F eeman,
E. Go schalk, L. G ay, D. G een, S. G ünendahl, O. Gu sche, J. Hanlon, D. Ha e, R.M. Ha is, J. Hi schaue ,
B. Hoobe man, Z. Hu, S. Jinda iani, M. Johnson, U. Joshi, A.W. Jung, B. Klima, B. K eis, S. Kwan †,
S. Lammel, J. Linac e, D. Lincoln, R. Lip on, T. Liu, R. Lopes De Sá, J. Lykken, K. Maeshima, J.M. Ma affino,
V.I. Ma inez Ou schoo n, S. Ma uyama, D. Mason, P. McB ide, P. Me kel, K. Mish a, S. M enna, S. Nahn,
C. Newman-Holmes, V. O’Dell, K. Ped o, O. P oko ye , G. Rakness, E. Sex on-Kennedy, A. Soha,
W.J. Spalding, L. Spiegel, L. Taylo , S. Tkaczyk, N.V. T an, L. Uplegge , E.W. Vaande ing, C. Ve nie i,
M. Ve zocchi, R. Vidal, H.A. Webe , A. Whi beck, F. Yang
Fe mi Na ional Accele a o Labo a o y, Ba a ia, USA
D. Acos a, P. A e y, P. Bo ignon, D. Bou ilko , A. Ca nes, M. Ca e , D. Cu y, S. Das, G.P. Di Gio anni,
R.D. Field, I.K. Fu ic, J. Hugon, J. Konigsbe g, A. Ko y o , J.F. Low, P. Ma, K. Ma che , H. Mei,
P. Mileno ic 62, G. Mi selmakhe , D. Rank, R. Rossin, L. Shchu ska, M. Snowball, D. Spe ka, J. Wang,
S. Wang, J. Yel on
Uni e si y o Flo ida, Gaines ille, USA
S. Hewamanage, S. Linn, P. Ma kowi z, G. Ma inez, J.L. Rod iguez
Flo ida In e na ional Uni e si y, Miami, USA
A. Acke , J.R. Adams, T. Adams, A. Askew, J. Bochenek, B. Diamond, J. Haas, S. Hagopian, V. Hagopian,
K.F. Johnson, A. Kha iwada, H. P ospe , V. Vee a agha an, M. Weinbe g
Flo ida S a e Uni e si y, Tallahassee, USA
V. Bhopa ka , M. Hohlmann, H. Kalakhe y, D. Noonan, T. Roy, F. Yumice a
Flo ida Ins i u e o Technology, Melbou ne, USA
M.R. Adams, L. Apanase ich, D. Be y, R.R. Be s, I. Bucinskai e, R. Ca anaugh, O. E dokimo , L. Gau hie ,
C.E. Ge be , D.J. Ho man, P. Ku , C. O’B ien, I.D. Sando al Gonzalez, C. Silkwo h, P. Tu ne , N. Va elas,
Z. Wu, M. Zaka ia
Uni e si y o Illinois a Chicago (UIC), Chicago, USA
B. Bilki 63, W. Cla ida, K. Dilsiz, S. Du gu , R.P. Gand ajula, M. Hay my ado , V. Kh is enko, J.-P. Me lo,
H. Me me kaya 64, A. Mes i ish ili, A. Moelle , J. Nach man, H. Ogul, Y. Onel, F. Ozok 53, A. Penzo,
C. Snyde , P. Tan, E. Ti as, J. We zel, K. Yi
The Uni e si y o Iowa, Iowa Ci y, USA
I. Ande son, B.A. Ba ne , B. Blumen eld, D. Fehling, L. Feng, A.V. G i san, P. Maksimo ic, C. Ma in,
M. Oshe son, M. Swa z, M. Xiao, Y. Xin, C. You
Johns Hopkins Uni e si y, Bal imo e, USA
P. Ba inge , A. Bean, G. Benelli, C. B une , R.P. Kenny III, D. Majumde , M. Malek, M. Mu ay, S. Sande s,
R. S inge , Q. Wang, J.S. Wood
The Uni e si y o Kansas, Law ence, USA
A. I ano , K. Kaadze, S. Khalil, M. Makouski, Y. Ma a in, A. Mohammadi, L.K. Saini, N. Skhi ladze,
S. Toda
Kansas S a e Uni e si y, Manha an, USA
D. Lange, F. Rebassoo, D. W igh
Law ence Li e mo e Na ional Labo a o y, Li e mo e, USA

CMS Collabo a ion / Physics Le e s B 753 (2016) 424–448 445
C. Anelli, A. Baden, O. Ba on, A. Belloni, B. Cal e , S.C. Eno, C. Fe aioli, J.A. Gomez, N.J. Hadley, S. Jabeen,
R.G. Kellogg, T. Kolbe g, J. Kunkle, Y. Lu, A.C. Migne ey, Y.H. Shin, A. Skuja, M.B. Tonjes, S.C. Tonwa
Uni e si y o Ma yland, College Pa k, USA
A. Apyan, R. Ba bie i, A. Ba y, K. Bie wagen, S. B and , W. Busza, I.A. Cali, Z. Demi agli, L. Di Ma eo,
G. Gomez Ceballos, M. Goncha o , D. Gulhan, Y. Iiyama, G.M. Innocen i, M. Klu e, D. Ko alskyi, Y.S. Lai,
Y.-J. Lee, A. Le in, P.D. Luckey, A.C. Ma ini, C. Mcginn, C. Mi ono , X. Niu, C. Paus, D. Ralph, C. Roland,
G. Roland, J. Sal eld-Nebgen, G.S.F. S ephans, K. Sumo ok, M. Va ma, D. Velicanu, J. Ve e ka, J. Wang,
T.W. Wang, B. Wyslouch, M. Yang, V. Zhuko a
Massachuse s Ins i u e o Technology, Camb idge, USA
B. Dahmes, A. Finkel, A. Gude, P. Hansen, S. Kala u , S.C. Kao, K. Klapoe ke, Y. Kubo a, Z. Lesko, J. Mans,
S. Nou bakhsh, N. Rucks uhl, R. Rusack, N. Tambe, J. Tu kewi z
Uni e si y o Minneso a, Minneapolis, USA
J.G. Acos a, S. Oli e os
Uni e si y o Mississippi, Ox o d, USA
E. A dee a, K. Bloom, S. Bose, D.R. Claes, A. Dominguez, C. Fangmeie , R. Gonzalez Sua ez,
R. Kamalieddin, J. Kelle , D. Knowl on, I. K a chenko, J. Lazo-Flo es, F. Meie , J. Mon oy, F. Ra niko ,
J.E. Siado, G.R. Snow
Uni e si y o Neb aska-Lincoln, Lincoln, USA
M. Alya i, J. Dolen, J. Geo ge, A. Godshalk, C. Ha ing on, I. Iash ili, J. Kaisen, A. Kha chila a, A. Kuma ,
S. Rappoccio
S a e Uni e si y o New Yo k a Bu alo, Bu alo, USA
G. Al e son, E. Ba be is, D. Baumga el, M. Chasco, A. Ho iang ham, B. Knapp, A. Massi oni, D.M. Mo se,
D. Nash, T. O imo o, R. Teixei a De Lima, D. T ocino, R.-J. Wang, D. Wood, J. Zhang
No heas e n Uni e si y, Bos on, USA
K.A. Hahn, A. Kubik, N. Mucia, N. Odell, B. Pollack, A. Pozdnyako , M. Schmi , S. S oyne , K. Sung,
M. T o a o, M. Velasco
No hwes e n Uni e si y, E ans on, USA
A. B inke ho , N. De , M. Hild e h, C. Jessop, D.J. Ka mga d, N. Kellams, K. Lannon, S. Lynch,
N. Ma inelli, F. Meng, C. Muelle , Y. Musienko 34, T. Pea son, M. Plane , A. Reins old, R. Ruch i, G. Smi h,
S. Ta oni, N. Valls, M. Wayne, M. Wol , A. Wooda d
Uni e si y o No e Dame, No e Dame, USA
L. An onelli, J. B inson, B. Bylsma, L.S. Du kin, S. Flowe s, A. Ha , C. Hill, R. Hughes, K. Ko o , T.Y. Ling,
B. Liu, W. Luo, D. Puigh, M. Rodenbu g, B.L. Wine , H.W. Wulsin
The Ohio S a e Uni e si y, Columbus, USA
O. D iga, P. Elme , J. Ha denb ook, P. Hebda, S.A. Koay, P. Lujan, D. Ma low, T. Med ede a, M. Mooney,
J. Olsen, C. Palme , P. Pi oué, X. Quan, H. Saka, D. S ickland, C. Tully, J.S. We ne , A. Zu anski
P ince on Uni e si y, P ince on, USA
S. Malik
Uni e si y o Pue o Rico, Mayaguez, USA
446 CMS Collabo a ion / Physics Le e s B 753 (2016) 424–448
V.E. Ba nes, D. Benede i, D. Bo ole o, L. Gu ay, M.K. Jha, M. Jones, K. Jung, M. K ess, D.H. Mille ,
N. Neumeis e , B.C. Radbu n-Smi h, X. Shi, I. Shipsey, D. Sil e s, J. Sun, A. S ya ko skiy, F. Wang, W. Xie,
L. Xu
Pu due Uni e si y, Wes La aye e, USA
N. Pa asha , J. S upak
Pu due Uni e si y Calume , Hammond, USA
A. Adai , B. Akgun, Z. Chen, K.M. Ecklund, F.J.M. Geu s, M. Guilbaud, W. Li, B. Michlin, M. No hup,
B.P. Padley, R. Redjimi, J. Robe s, J. Ro ie, Z. Tu, J. Zabel
Rice Uni e si y, Hous on, USA
B. Be cha , A. Bodek, P. de Ba ba o, R. Demina, Y. Eshaq, T. Fe bel, M. Galan i, A. Ga cia-Bellido,
P. Goldenzweig, J. Han, A. Ha el, O. Hind ichs, A. Khukhunaish ili, G. Pe illo, M. Ve ze i
Uni e si y o Roches e , Roches e , USA
L. Demo ie
The Rocke elle Uni e si y, New Yo k, USA
S. A o a, A. Ba ke , J.P. Chou, C. Con e as-Campana, E. Con e as-Campana, D. Duggan, D. Fe encek,
Y. Ge sh ein, R. G ay, E. Halkiadakis, D. Hidas, E. Hughes, S. Kaplan, R. Kunnawalkam Elaya alli, A. La h,
K. Nash, S. Panwalka , M. Pa k, S. Salu , S. Schne ze , D. Sheffield, S. Somalwa , R. S one, S. Thomas,
P. Thomassen, M. Walke
Ru ge s, The S a e Uni e si y o New Je sey, Pisca away, USA
M. Foe s e , G. Riley, K. Rose, S. Spanie , A. Yo k
Uni e si y o Tennessee, Knox ille, USA
O. Bouhali 65, A. Cas aneda He nandez, M. Dalchenko, M. De Ma ia, A. Delgado, S. Dildick, R. Eusebi,
W. Flanagan, J. Gilmo e, T. Kamon 66, V. K u elyo , R. Mon al o, R. Muelle , I. Osipenko , Y. Pakho in,
R. Pa el, A. Pe lo , J. Roe, A. Rose, A. Sa ono , A. Ta a ino , K.A. Ulme 2
Texas A&M Uni e si y, College S a ion, USA
N. Akchu in, C. Cowden, J. Damgo , C. D agoiu, P.R. Dude o, J. Faulkne , S. Kuno i, K. Lamichhane,
S.W. Lee, T. Libei o, S. Undleeb, I. Voloboue
Texas Tech Uni e si y, Lubbock, USA
E. Appel , A.G. Delannoy, S. G eene, A. Gu ola, R. Janjam, W. Johns, C. Magui e, Y. Mao, A. Melo, H. Ni,
P. Sheldon, B. Snook, S. Tuo, J. Velko ska, Q. Xu
Vande bil Uni e si y, Nash ille, USA
M.W. A en on, S. Bou le, B. Cox, B. F ancis, J. Goodell, R. Hi osky, A. Ledo skoy, H. Li, C. Lin, C. Neu,
E. Wol e, J. Wood, F. Xia
Uni e si y o Vi ginia, Cha lo es ille, USA
C. Cla ke, R. Ha , P.E. Ka chin, C. Ko achchi Kankanamge Don, P. Lamichhane, J. S u dy
Wayne S a e Uni e si y, De oi , USA
D.A. Belknap, D. Ca lsmi h, M. Cepeda, A. Ch is ian, S. Dasu, L. Dodd, S. Du ic, E. F iis, B. Gombe ,
R. Hall-Wil on, M. He ndon, A. He é, P. Klabbe s, A. Lana o, A. Le ine, K. Long, R. Lo eless,
CMS Collabo a ion / Physics Le e s B 753 (2016) 424–448 447
A. Mohapa a, I. Ojal o, T. Pe y, G.A. Pie o, G. Polese, I. Ross, T. Ruggles, T. Sa angi, A. Sa in, A. Sha ma,
N. Smi h, W.H. Smi h, D. Taylo , N. Woods
Uni e si y o Wisconsin, Madison, USA
†Deceased.
1Also a Vienna Uni e si y o Technology, Vienna, Aus ia.
2Also a CERN, Eu opean O ganiza ion o Nuclea Resea ch, Gene a, Swi ze land.
3Also a S a e Key Labo a o y o Nuclea Physics and Technology, Peking Uni e si y, Beijing, China.
4Also a Ins i u Plu idisciplinai e Hube Cu ien, Uni e si é de S asbou g, Uni e si é de Hau e Alsace Mulhouse, CNRS/IN2P3, S asbou g, F ance.
5Also a Na ional Ins i u e o Chemical Physics and Biophysics, Tallinn, Es onia.
6Also a Skobel syn Ins i u e o Nuclea Physics, Lomonoso Moscow S a e Uni e si y, Moscow, Russia.
7Also a Uni e sidade Es adual de Campinas, Campinas, B azil.
8Also a Cen e Na ional de la Reche che Scien ifique (CNRS) – IN2P3, Pa is, F ance.
9Also a Labo a oi e Lep ince-Ringue , Ecole Poly echnique, IN2P3-CNRS, Palaiseau, F ance.
10 Also a Join Ins i u e o Nuclea Resea ch, Dubna, Russia.
11 Also a B i ish Uni e si y in Egyp , Cai o, Egyp .
12 Now a Beni-Sue Uni e si y, Bani Swei , Egyp .
13 Now a Ain Shams Uni e si y, Cai o, Egyp .
14 Also a Zewail Ci y o Science and Technology, Zewail, Egyp .
15 Also a Uni e si é de Hau e Alsace, Mulhouse, F ance.
16 Also a Tbilisi S a e Uni e si y, Tbilisi, Geo gia.
17 Also a Uni e si y o Hambu g, Hambu g, Ge many.
18 Also a B andenbu g Uni e si y o Technology, Co bus, Ge many.
19 Also a Ins i u e o Nuclea Resea ch ATOMKI, Deb ecen, Hunga y.
20 Also a Eö ös Lo ánd Uni e si y, Budapes , Hunga y.
21 Also a Uni e si y o Deb ecen, Deb ecen, Hunga y.
22 Also a Wigne Resea ch Cen e o Physics, Budapes , Hunga y.
23 Also a Uni e si y o Vis a-Bha a i, San inike an, India.
24 Now a King Abdulaziz Uni e si y, Jeddah, Saudi A abia.
25 Also a Uni e si y o Ruhuna, Ma a a, S i Lanka.
26 Also a Is ahan Uni e si y o Technology, Is ahan, I an.
27 Also a Uni e si y o Teh an, Depa men o Enginee ing Science, Teh an, I an.
28 Also a Plasma Physics Resea ch Cen e , Science and Resea ch B anch, Islamic Azad Uni e si y, Teh an, I an.
29 Also a Uni e si à degli S udi di Siena, Siena, I aly.
30 Also a Pu due Uni e si y, Wes La aye e, USA.
31 Also a In e na ional Islamic Uni e si y o Malaysia, Kuala Lumpu , Malaysia.
32 Also a Malaysian Nuclea Agency, MOSTI, Kajang, Malaysia.
33 Also a Consejo Nacional de Ciencia yTecnología, Mexico ci y, Mexico.
34 Also a Ins i u e o Nuclea Resea ch, Moscow, Russia.
35 Also a S . Pe e sbu g S a e Poly echnical Uni e si y, S . Pe e sbu g, Russia.
36 Also a Na ional Resea ch Nuclea Uni e si y ‘Moscow Enginee ing Physics Ins i u e’ (MEPhI), Moscow, Russia.
37 Also a Cali o nia Ins i u e o Technology, Pasadena, USA.
38 Also a Facul y o Physics, Uni e si y o Belg ade, Belg ade, Se bia.
39 Also a Facol à Ingegne ia, Uni e si à di Roma, Roma, I aly.
40 Also a Na ional Technical Uni e si y o A hens, A hens, G eece.
41 Also a Scuola No male e Sezione dell’INFN, Pisa, I aly.
42 Also a Uni e si y o A hens, A hens, G eece.
43 Also a Wa saw Uni e si y o Technology, Ins i u e o Elec onic Sys ems, Wa saw, Poland.
44 Also a Ins i u e o Theo e ical and Expe imen al Physics, Moscow, Russia.
45 Also a Albe Eins ein Cen e o Fundamen al Physics, Be n, Swi ze land.
46 Also a Gaziosmanpasa Uni e si y, Toka , Tu key.
47 Also a Me sin Uni e si y, Me sin, Tu key.
48 Also a Cag Uni e si y, Me sin, Tu key.
49 Also a Pi i Reis Uni e si y, Is anbul, Tu key.
50 Also a Adiyaman Uni e si y, Adiyaman, Tu key.
51 Also a Ozyegin Uni e si y, Is anbul, Tu key.
52 Also a Izmi Ins i u e o Technology, Izmi , Tu key.
53 Also a Mima Sinan Uni e si y, Is anbul, Is anbul, Tu key.
54 Also a Ma ma a Uni e si y, Is anbul, Tu key.
55 Also a Ka kas Uni e si y, Ka s, Tu key.
56 Also a Yildiz Technical Uni e si y, Is anbul, Tu key.
57 Also a Hace epe Uni e si y, Anka a, Tu key.
58 Also a Ru he o d Apple on Labo a o y, Didco , Uni ed Kingdom.
59 Also a School o Physics and As onomy, Uni e si y o Sou hamp on, Sou hamp on, Uni ed Kingdom.
60 Also a Ins i u o de As o ísica de Cana ias, La Laguna, Spain.
61 Also a U ah Valley Uni e si y, O em, USA.
62 Also a Uni e si y o Belg ade, Facul y o Physics and Vinca Ins i u e o Nuclea Sciences, Belg ade, Se bia.
63 Also a A gonne Na ional Labo a o y, A gonne, USA.
448 CMS Collabo a ion / Physics Le e s B 753 (2016) 424–448
64 Also a E zincan Uni e si y, E zincan, Tu key.
65 Also a Texas A&M Uni e si y a Qa a , Doha, Qa a .
66 Also a Kyungpook Na ional Uni e si y, Daegu, Republic o Ko ea.