IIUM Repository

Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at root s(NN)=8.16 TeV

A. M., Sirunyan and A.R., Tumasyan and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd Adli (2021) Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at root s(NN)=8.16 TeV. Physical Review C, 103 (1). ISSN 2469-9985 E-ISSN 2469-9993

[img]
Preview
PDF - Published Version
Download (874kB) | Preview
[img]
Preview
PDF (SCOPUS) - Supplemental Material
Download (940kB) | Preview
[img]
Preview
PDF (WoS) - Supplemental Material
Download (1MB) | Preview

Abstract

Event-by-event long-range correlations of azimuthal anisotropy Fourier coefficients (vn) in 8.16 TeV pPb data, collected by the CMS experiment at the CERN Large Hadron Collider, are extracted using a subevent four-particle cumulant technique applied to very low multiplicity events. Each combination of four charged particles is selected from either two, three, or four distinct subevent regions of a pseudorapidity range from -2.4 to 2.4 of the CMS tracker, and with transverse momentum between 0.3 and 3.0 GeV. Using the subevent cumulant technique, correlations between vn of different orders are measured as functions of particle multiplicity and compared to the standard cumulant method without subevents over a wide event multiplicity range. At high multiplicities, the v2 and v3 coefficients exhibit an anticorrelation; this behavior is observed consistently using various methods. The v2 and v4 correlation strength is found to depend on the number of subevents used in the calculation. As the event multiplicity decreases, the results from different subevent methods diverge because of different contributions of noncollective or few-particle correlations. Correlations extracted with the four-subevent method exhibit a tendency to diminish monotonically toward the lowest multiplicity region (about 20 charged tracks) investigated. These findings extend previous studies to a significantly lower event multiplicity range and establish the evidence for the onset of long-range collective multiparticle correlations in small system collisions

Item Type: Article (Journal)
Uncontrolled Keywords: Correlations, azimuthal anisotropy, Fourier harmonics, subevent cumulants, pPb collisions, s(NN)=8.16 TeV
Subjects: Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Science > Department of Physics
Depositing User: Suhani Saarani
Date Deposited: 11 Feb 2021 15:59
Last Modified: 11 Feb 2021 15:59
URI: http://irep.iium.edu.my/id/eprint/88337

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year