Measurement of the (anti-)3He elliptic flow in Pb-Pb collisions at √sNN=5.02TeV



Acharya, S, Adamova, D, Adhya, SP, Adler, A, Adolfsson, J, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z
et al (show 1021 more authors) (2020) Measurement of the (anti-)3He elliptic flow in Pb-Pb collisions at √sNN=5.02TeV PHYSICS LETTERS B, 805. 135414-. ISSN 0370-2693, 1873-2445

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Abstract

The elliptic flow (v<inf>2</inf>) of (anti-)3He is measured in Pb–Pb collisions at s<inf>NN</inf>=5.02TeV in the transverse-momentum (p<inf>T</inf>) range of 2–6 GeV/c for the centrality classes 0–20%, 20–40%, and 40–60% using the event-plane method. This measurement is compared to that of pions, kaons, and protons at the same center-of-mass energy. A clear mass ordering is observed at low p<inf>T</inf>, as expected from relativistic hydrodynamics. The violation of the scaling of v<inf>2</inf> with the number of constituent quarks at low p<inf>T</inf>, already observed for identified hadrons and deuterons at LHC energies, is confirmed also for (anti-)3He. The elliptic flow of (anti-)3He is underestimated by the Blast-Wave model and overestimated by a simple coalescence approach based on nucleon scaling. The elliptic flow of (anti-)3He measured in the centrality classes 0–20% and 20–40% is well described by a more sophisticated coalescence model where the phase-space distributions of protons and neutrons are generated using the iEBE-VISHNU hybrid model with AMPT initial conditions.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Divisions: Faculty of Science & Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 10 Sep 2021 14:20
Last Modified: 16 Jun 2026 14:13
DOI: 10.1016/j.physletb.2020.135414
Open Access URL: https://doi.org/10.1016/j.physletb.2020.135414
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3136649
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