Elliptic Flow of Charm and Strange Hadrons in High-Multiplicity
Author(s)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.; ... Show more Show less
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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.
DepartmentMassachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Physical Review Letters
American Physical Society
Sirunyan, A. M., et al. “Elliptic Flow of Charm and Strange Hadrons in High-Multiplicity p + Pb Collisions at √s[subscript NN] = 8.16 TeV.” Physical Review Letters, vol. 121, no. 8, Aug. 2018. © 2018 CERN.
Final published version