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

ALICE Collaboration; S Acharya; Jonatan Adolfsson; Peter Christiansen; Oliver Matonoha; Adrian Nassirpour; Anders Oskarsson; Tuva Richert; Omar Vazquez Rueda; David Silvermyr; Evert Stenlund; N Zurlo

doi:10.1016/j.physletb.2020.135414

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

ALICE Collaboration, S Acharya, Jonatan Adolfsson, Peter Christiansen, Oliver Matonoha, Adrian Nassirpour, Anders Oskarsson, Tuva Richert, Omar Vazquez Rueda, David Silvermyr, Evert Stenlund, N Zurlo

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Abstract

The elliptic flow (v2) of (anti-)3He is measured in Pb–Pb collisions at sNN=5.02TeV in the transverse-momentum (pT) 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 pT, as expected from relativistic hydrodynamics. The violation of the scaling of v2 with the number of constituent quarks at low pT, 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. © 2020 European Organization for Nuclear Research

Original language	English
Article number	135414
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	805
DOIs	https://doi.org/10.1016/j.physletb.2020.135414
Publication status	Published - 2020

Subject classification (UKÄ)

Subatomic Physics

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10.1016/j.physletb.2020.135414

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ALICE Collaboration, Acharya, S., Adolfsson, J., Christiansen, P., Matonoha, O., Nassirpour, A., Oskarsson, A., Richert, T., Vazquez Rueda, O., Silvermyr, D., Stenlund, E., & Zurlo, N. (2020). Measurement of the (anti-)3He elliptic flow in Pb–Pb collisions at sNN=5.02TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 805, Article 135414. https://doi.org/10.1016/j.physletb.2020.135414

@article{0d7366fa503947ecb4aba4f4b3c17007,

title = "Measurement of the (anti-)3He elliptic flow in Pb–Pb collisions at sNN=5.02TeV",

abstract = "The elliptic flow (v2) of (anti-)3He is measured in Pb–Pb collisions at sNN=5.02TeV in the transverse-momentum (pT) 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 pT, as expected from relativistic hydrodynamics. The violation of the scaling of v2 with the number of constituent quarks at low pT, 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. {\textcopyright} 2020 European Organization for Nuclear Research",

author = "{ALICE Collaboration} and S Acharya and Jonatan Adolfsson and Peter Christiansen and Oliver Matonoha and Adrian Nassirpour and Anders Oskarsson and Tuva Richert and {Vazquez Rueda}, Omar and David Silvermyr and Evert Stenlund and N Zurlo",

year = "2020",

doi = "10.1016/j.physletb.2020.135414",

language = "English",

volume = "805",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

}

ALICE Collaboration, Acharya, S, Adolfsson, J, Christiansen, P , Matonoha, O , Nassirpour, A , Oskarsson, A, Richert, T, Vazquez Rueda, O, Silvermyr, D , Stenlund, E & Zurlo, N 2020, 'Measurement of the (anti-)3He elliptic flow in Pb–Pb collisions at sNN=5.02TeV', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 805, 135414. https://doi.org/10.1016/j.physletb.2020.135414

TY - JOUR

T1 - Measurement of the (anti-)3He elliptic flow in Pb–Pb collisions at sNN=5.02TeV

AU - ALICE Collaboration

AU - Acharya, S

AU - Adolfsson, Jonatan

AU - Christiansen, Peter

AU - Matonoha, Oliver

AU - Nassirpour, Adrian

AU - Oskarsson, Anders

AU - Richert, Tuva

AU - Vazquez Rueda, Omar

AU - Silvermyr, David

AU - Stenlund, Evert

AU - Zurlo, N

PY - 2020

Y1 - 2020

N2 - The elliptic flow (v2) of (anti-)3He is measured in Pb–Pb collisions at sNN=5.02TeV in the transverse-momentum (pT) 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 pT, as expected from relativistic hydrodynamics. The violation of the scaling of v2 with the number of constituent quarks at low pT, 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. © 2020 European Organization for Nuclear Research

AB - The elliptic flow (v2) of (anti-)3He is measured in Pb–Pb collisions at sNN=5.02TeV in the transverse-momentum (pT) 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 pT, as expected from relativistic hydrodynamics. The violation of the scaling of v2 with the number of constituent quarks at low pT, 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. © 2020 European Organization for Nuclear Research

U2 - 10.1016/j.physletb.2020.135414

DO - 10.1016/j.physletb.2020.135414

M3 - Article

SN - 0370-2693

VL - 805

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 135414

ER -

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

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