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Fluctuations of charge separation perpendicular to the event plane and local parity violation in √ sNN= 200 GeV Au+Au collisions at RHIC

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:
Fluctuations of charge separation perpendicular to the event plane and local parity violation in √ sNN= 200 GeV Au+Au collisions at RHIC
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.1302.3802
Descrição: Previous experimental results based on data (∼ 15 million events) collected by the STAR detector at RHIC suggest event-by-event charge separation ﬂuctuations perpendicular to the event plane in non-central heavy-ion collisions. Here we present the correlator previously used split into its two component parts to reveal correlations parallel and perpendicular to the event plane. The results are from a high statistics 200 GeV Au+Au collisions data set (57 million events) collected by the STAR experiment. We explicitly count units of charge separation from which we ﬁnd clear evidence for more charge separation ﬂuctuations perpendicular than parallel to the event plane. We also employ a modiﬁed correlator to study the possible P-even background in same and opposite charge correlations, and ﬁnd that the P-even background may largely be explained by momentum conservation and collective motion.
Editor: São Paulo
Data de criação/publicação: 2013
Formato: 10 p.
Idioma: Inglês

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