Elliptic flow of charm and strange hadrons in high-multiplicity p+Pb collisions at sNN =8.16 TeV
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Type :
Article
Publication Status :
Published
Access :
openAccess
Abstract
The elliptic azimuthal anisotropy coefficient (v2) is measured for charm (D0) and strange (KS0, Λ, Ξ-, and Ω-) hadrons, using a data sample of p+Pb collisions collected by the CMS experiment, at a nucleon-nucleon center-of-mass energy of sNN=8.16 TeV. A significant positive v2 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 v2 than the lighter quarks, probably reflecting a weaker collective behavior. This effect is not seen in the larger PbPb collision system at sNN=5.02 TeV, also presented.
Source :
Physical Review Letters
Date :
2018-08-21
Volume :
121
Issue :
8
Publisher :
American Physical Society
URI
http://hdl.handle.net/10679/6224https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.121.082301
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