Elliptic Flow of Charm and Strange Hadrons in High-Multiplicity

Elliptic Flow of Charm and Strange Hadrons in High-Multiplicity

The elliptic azimuthal anisotropy coefficient (v[subscript 2]) is measured for charm (D[superscript 0]) and strange (K[superscript 0][subscript S], Λ, Ξ[superscript -], and Ω[superscript -]) hadrons, using a data sample of p+Pb collisions collected by the CMS experiment, at a nucleon-nucleon center-...

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Bibliographic Details
Main Authors: Abercrombie, Daniel Robert, Allen, Brandon Leigh, Azzolini, Virginia, Barbieri, Richard Alexander, Baty, Austin Alan, Bauer, Gerry P, Bi, Ran, Brandt, Stephanie Akemi, Busza, Wit, Cali, Ivan Amos, D'Alfonso, Mariarosaria, Demiragli, Zeynep, Gomez-Ceballos, Guillelmo, Goncharov, Maxim, Harris, Philip Coleman, Hsu, Dylan George, Hu, Miao, Iiyama, Yutaro, Innocenti, Gian Michele, Klute, Markus, Kovalskyi, Dmytro, Lee, Yen-Jie, Levin, Andrew Michael, Luckey Jr, P David, Maier, Benedikt, Marini, Andrea Carlo, McGinn, Christopher Francis, Mironov, Camelia Maria, Narayanan, Siddharth Madhavan, Niu, Xinmei, Paus, Christoph M. E., Roland, Christof E, Roland, Gunther M, Stephans, George S. F., Sumorok, Konstanty C, Tatar, Kaya, Velicanu, Dragos Alexandru, Wang, J., Wang, Ta-Wei, Wyslouch, Boleslaw, Zhaozhong, S.
Other Authors: Massachusetts Institute of Technology. Department of Physics
Format: Article
Published: American Physical Society 2018
Online Access:http://hdl.handle.net/1721.1/118802
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Description
Summary:The elliptic azimuthal anisotropy coefficient (v[subscript 2]) is measured for charm (D[superscript 0]) and strange (K[superscript 0][subscript S], Λ, Ξ[superscript -], and Ω[superscript -]) hadrons, using a data sample of p+Pb collisions collected by the CMS experiment, at a nucleon-nucleon center-of-mass energy of √s[subscript NN] =8.16 TeV. A significant positive v[subscript 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 v[subscript 2] than the lighter quarks, probably reflecting a weaker collective behavior. This effect is not seen in the larger PbPb collision system at √s[subscript NN] = 5.02 TeV, also presented.

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