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Observation of an energy-dependent diﬀerence in elliptic ﬂow between particles and anti-particles in relativistic heavy ion collisions

L Adamczyk Lucas Mafia de Lima; Marcelo Gameiro Munhoz; Renato Aparecido Negrão de Oliveira; Ulisses Gulart de Souza; Alexandre Alarcon do Passo Suaide; Alejandro Szanto de Toledo

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Título:
Observation of an energy-dependent diﬀerence in elliptic ﬂow between particles and anti-particles in relativistic heavy ion collisions
Autor: L Adamczyk
Lucas Mafia de Lima; Marcelo Gameiro Munhoz; Renato Aparecido Negrão de Oliveira; Ulisses Gulart de Souza; Alexandre Alarcon do Passo Suaide; Alejandro Szanto de Toledo
Assuntos: COLISÕES DE ÍONS PESADOS RELATIVÍSTICOS
Notas: arXiv.1301.2347
Descrição: Elliptic ﬂow (v2) values for identiﬁed particles at mid-rapidity in Au+Au collisions, measured by the STAR experiment in the Beam Energy Scan at RHIC at √ sNN = 7.7–62.4 GeV, are presented. A beam-energy dependent diﬀerence of the values of v2 between particles and corresponding antiparticles was observed. The diﬀerence increases with decreasing beam energy and is larger for baryons compared to mesons. This implies that, at lower energies, particles and anti-particles are not consistent with the universal number-of-constituent-quark (NCQ) scaling of v2 that was observed at √ sNN = 200 GeV.
Editor: São Paulo
Data de criação/publicação: 2013
Formato: 7 p.
Idioma: Inglês

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