Suppression and azimuthal anisotropy of prompt and nonprompt J/psi production in PbPb collisions at root S-NN=2.76 TeV
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Published version
Author(s)
Type
Journal Article
Abstract
The nuclear modification factor
R
AA
and the
azimuthal anisotropy coefficient
v
2
of prompt and nonprompt
(i.e. those from decays of b hadrons) J
/ψ
mesons, measured
from PbPb and pp collisions at
√
s
NN
=
2
.
76 TeV at the LHC,
are reported. The results are presented in several event cen-
trality intervals and several kinematic regions, for transverse
momenta
p
T
>
6
.
5GeV
/
c and rapidity
|
y
|
<
2
.
4, extending
down to
p
T
=
3GeV
/
cinthe1
.
6
<
|
y
|
<
2
.
4 range. The
v
2
of prompt J
/ψ
is found to be nonzero, but with no strong
dependence on centrality, rapidity, or
p
T
over the full kine-
matic range studied. The measured
v
2
of nonprompt J
/ψ
is
consistent with zero. The
R
AA
of prompt J
/ψ
exhibits a sup-
pression that increases from peripheral to central collisions
but does not vary strongly as a function of either
y
or
p
T
in the
fiducial range. The nonprompt J
/ψ
R
AA
shows a suppression
which becomes stronger as rapidity or
p
T
increases. The
v
2
and
R
AA
of open and hidden charm, and of open charm and
beauty, are compared.
R
AA
and the
azimuthal anisotropy coefficient
v
2
of prompt and nonprompt
(i.e. those from decays of b hadrons) J
/ψ
mesons, measured
from PbPb and pp collisions at
√
s
NN
=
2
.
76 TeV at the LHC,
are reported. The results are presented in several event cen-
trality intervals and several kinematic regions, for transverse
momenta
p
T
>
6
.
5GeV
/
c and rapidity
|
y
|
<
2
.
4, extending
down to
p
T
=
3GeV
/
cinthe1
.
6
<
|
y
|
<
2
.
4 range. The
v
2
of prompt J
/ψ
is found to be nonzero, but with no strong
dependence on centrality, rapidity, or
p
T
over the full kine-
matic range studied. The measured
v
2
of nonprompt J
/ψ
is
consistent with zero. The
R
AA
of prompt J
/ψ
exhibits a sup-
pression that increases from peripheral to central collisions
but does not vary strongly as a function of either
y
or
p
T
in the
fiducial range. The nonprompt J
/ψ
R
AA
shows a suppression
which becomes stronger as rapidity or
p
T
increases. The
v
2
and
R
AA
of open and hidden charm, and of open charm and
beauty, are compared.
Date Issued
2017-04-19
Date Acceptance
2017-03-21
Citation
European Physical Journal C, 2017, 77 (4)
ISSN
1434-6052
Publisher
Springer Verlag (Germany)
Journal / Book Title
European Physical Journal C
Volume
77
Issue
4
Copyright Statement
© CERN for the benefit of the CMS collaboration 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000399833700003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
ENERGY NUCLEAR COLLISIONS
HEAVY-ION COLLISIONS
QUARK-GLUON PLASMA
QCD MATTER
LHC
DISSOCIATION
COMOVERS
PROTON
FLAVOR
FLOW
Publication Status
Published
Article Number
ARTN 252