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10.1103-PhysRevC.95.064914.pdf (2.55 MB)

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

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posted on 2023-06-09, 07:13 authored by Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, C A Chavez Barajas, Antonella De SantoAntonella De Santo, Fabrizio SalvatoreFabrizio Salvatore, I Santoyo Castillo, K Suruliz, Mark SuttonMark Sutton, Iacopo Vivarelli, The ATLAS Collaboration
Two-particle pseudorapidity correlations are measured in vsNN = 2.76 TeV Pb+Pb , vsNN=5.02 TeV p+Pb, and vs=13 TeV pp collisions at the Large Hadron Collider (LHC), with total integrated luminosities of approximately 7µb-1, 28nb-1, and 65nb-1, respectively. The correlation function CN(?1, ?2) is measured as a function of event multiplicity using charged particles in the pseudorapidity range |?|<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+?a21?1/2 ?1?2 in all collision systems over the full multiplicity range. The values of ?a21?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 ?a21?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 ? than in pp collisions with comparable multiplicity.

Funding

ATLAS; G0275; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/I006048/1

History

Publication status

  • Published

File Version

  • Published version

Journal

Physical Review C

ISSN

2469-9985

Publisher

American Physical Society

Issue

6

Volume

95

Article number

a6

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Experimental Particle Physics Research Group Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2017-07-14

First Open Access (FOA) Date

2017-07-14

First Compliant Deposit (FCD) Date

2017-07-14

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