Elliptic Flow of Charm and Strange Hadrons in High-Multiplicity p plus Pb Collisions at root(NN)-N-s=8.16 TeV
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Date
2018-08-21
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
AMER PHYSICAL SOC
Access Rights
info:eu-repo/semantics/openAccess
Abstract
The elliptic azimuthal anisotropy coefficient (upsilon(2)) is measured for charm (D-0) and strange (K-S(0), Lambda, Xi(-), and Omega(-)) hadrons, using a data sample of p + Pb collisions collected by the CMS experiment, at a nucleonnucleon center-of- mass energy of root(NN)-N-s = 8.16 TeV. A significant positive upsilon(2) signal from long- range azimuthal correlations is observed for all particle species in high- multiplicity p + 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 upsilon(2) than the lighter quarks, probably reflecting a weaker collective behavior. This effect is not seen in the larger PbPb collision system at root(NN)-N-s = 5.02 TeV, also presented.
Description
Keywords
RELATIVISTIC NUCLEAR COLLISIONS, RANGE ANGULAR-CORRELATIONS, LONG-RANGE, 2-PARTICLE CORRELATIONS, SIDE, PPB, COLLECTIVITY, EVENT
Journal or Series
PHYSICAL REVIEW LETTERS
WoS Q Value
Q1
