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Measurement of forward-backward multiplicity correlations in lead-lead, proton-lead, and proton-proton collisions with the ATLAS detector

, ; Aaboud, M; Åkesson, Torsten LU ; Bocchetta, Simona LU ; Bryngemark, Lene LU ; Doglioni, Caterina LU ; Floderus, Anders LU ; Hedberg, Vincent LU ; Jarlskog, Göran LU and Lytken, Else LU , et al. (2017) In Physical Review C 95(6). p.277-280
Abstract
Two-particle pseudorapidity correlations are measured in sNN=2.76TeVPb+Pb, sNN=5.02TeVp+Pb, and s=13TeVpp collisions at the Large Hadron Collider (LHC), with total integrated luminosities of approximately 7μb-1, 28 nb-1, and 65 nb-1, respectively. The correlation function CN(η1,η2) is measured as a function of event multiplicity using charged particles in the pseudorapidity range |η|<2.4. The correlation function contains a significant short-range component, which is estimated and subtracted. After removal of the short-range component, the shape of the correlation function is described approximately by 1+(a12)1/2η1η2 in all collision systems over the full multiplicity range. The values of (a12)1/2 are consistent for the opposite-charge... (More)
Two-particle pseudorapidity correlations are measured in sNN=2.76TeVPb+Pb, sNN=5.02TeVp+Pb, and s=13TeVpp collisions at the Large Hadron Collider (LHC), with total integrated luminosities of approximately 7μb-1, 28 nb-1, and 65 nb-1, respectively. The correlation function CN(η1,η2) is measured as a function of event multiplicity using charged particles in the pseudorapidity range |η|<2.4. The correlation function contains a significant short-range component, which is estimated and subtracted. After removal of the short-range component, the shape of the correlation function is described approximately by 1+(a12)1/2η1η2 in all collision systems over the full multiplicity range. The values of (a12)1/2 are consistent for the opposite-charge pairs and same-charge pairs, and for the three collision systems at similar multiplicity. The values of (a12)1/2 and the magnitude of the short-range component both follow a power-law dependence on the event multiplicity. The short-range component in p + Pb collisions, after symmetrizing the proton and lead directions, is found to be smaller at a given η than in pp collisions with comparable multiplicity. © 2017 CERN. (Less)
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Contribution to journal
publication status
published
subject
keywords
ATLAS, flow decorrelation, heavy-ion collisions, jet quenching, multi-particle cumulants, quark-gluon plasma
in
Physical Review C
volume
95
issue
6
pages
277 - 280
publisher
American Physical Society
external identifiers
  • scopus:85023191191
ISSN
2469-9985
DOI
10.1103/PhysRevC.95.064914
language
English
LU publication?
yes
id
0b7a7287-af96-49af-aede-379cb541a9b3
date added to LUP
2018-09-27 10:43:05
date last changed
2019-05-19 05:01:50
@article{0b7a7287-af96-49af-aede-379cb541a9b3,
  abstract     = {Two-particle pseudorapidity correlations are measured in sNN=2.76TeVPb+Pb, sNN=5.02TeVp+Pb, and s=13TeVpp collisions at the Large Hadron Collider (LHC), with total integrated luminosities of approximately 7μb-1, 28 nb-1, and 65 nb-1, respectively. The correlation function CN(η1,η2) is measured as a function of event multiplicity using charged particles in the pseudorapidity range |η|&lt;2.4. The correlation function contains a significant short-range component, which is estimated and subtracted. After removal of the short-range component, the shape of the correlation function is described approximately by 1+(a12)1/2η1η2 in all collision systems over the full multiplicity range. The values of (a12)1/2 are consistent for the opposite-charge pairs and same-charge pairs, and for the three collision systems at similar multiplicity. The values of (a12)1/2 and the magnitude of the short-range component both follow a power-law dependence on the event multiplicity. The short-range component in p + Pb collisions, after symmetrizing the proton and lead directions, is found to be smaller at a given η than in pp collisions with comparable multiplicity. © 2017 CERN.},
  author       = {,  and Aaboud, M and Åkesson, Torsten and Bocchetta, Simona and Bryngemark, Lene and Doglioni, Caterina and Floderus, Anders and Hedberg, Vincent and Jarlskog, Göran and Lytken, Else and Mjörnmark, Ulf and Smirnova, Oxana and Viazlo, Oleksandr},
  issn         = {2469-9985},
  keyword      = {ATLAS,flow decorrelation,heavy-ion collisions,jet quenching,multi-particle cumulants,quark-gluon plasma},
  language     = {eng},
  number       = {6},
  pages        = {277--280},
  publisher    = {American Physical Society},
  series       = {Physical Review C},
  title        = {Measurement of forward-backward multiplicity correlations in lead-lead, proton-lead, and proton-proton collisions with the ATLAS detector},
  url          = {http://dx.doi.org/10.1103/PhysRevC.95.064914},
  volume       = {95},
  year         = {2017},
}