Elliptic flow of charm and strange hadrons in high-multiplicity p+Pb collisions at sNN =8.16 TeV

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2018) Elliptic flow of charm and strange hadrons in high-multiplicity p+Pb collisions at sNN =8.16 TeV. Physical Review Letters, 121 (8). 082301-1. ISSN 0031-9007 E-ISSN 1079-7114

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Abstract

The elliptic azimuthal anisotropy coefficient (v2) is measured for charm (D0) and strange (K0 S, Λ, Ξ−, and Ω−) hadrons, using a data sample of p þ Pb collisions collected by the CMS experiment, at a nucleonnucleon center-of-mass energy of ffiffiffiffiffiffiffi sNN p ¼ 8.16 TeV. A significant positive v2 signal from long-range azimuthal correlations is observed for all particle species in high-multiplicity p þ Pb collisions. The measurement represents the first observation of possible long-range collectivity for open heavy flavor hadrons in small systems. The results suggest that charm quarks have a smaller v2 than the lighter quarks, probably reflecting a weaker collective behavior. This effect is not seen in the larger PbPb collision system at ffiffiffiffiffiffiffi sNN p ¼ 5.02 TeV, also presented.

Item Type:	Article (Journal)
Additional Information:	7861/69949
Uncontrolled Keywords:	Elliptic flow; Charm and strange hadrons; High-multiplicity; p+Pb collisions; sNN =8.16 TeV
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Physics
Depositing User:	Dr Mohd Adli MD Ali
Date Deposited:	23 Jan 2019 10:00
Last Modified:	15 Jul 2019 09:41
URI:	http://irep.iium.edu.my/id/eprint/69949

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