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Elliptic flow of identified hadrons in Au+Au collisions at √s NN=7.7-62.4 GeV
Authors
L Adamczyk
JK Adkins
+98 more
G Agakishiev
MM Aggarwal
Z Ahammed
I Alekseev
J Alford
CD Anson
A Aparin
D Arkhipkin
E Aschenauer
GS Averichev
J Balewski
A Banerjee
Z Barnovska
DR Beavis
R Bellwied
MJ Betancourt
RR Betts
A Bhasin
AK Bhati
P Bhattarai
H Bichsel
J Bielcik
J Bielcikova
LC Bland
IG Bordyuzhin
W Borowski
J Bouchet
AV Brandin
SG Brovko
E Bruna
I Bunzarov
TP Burton
J Butterworth
S Bültmann
XZ Cai
H Caines
M Calderón De La Barca Sánchez
D Cebra
R Cendejas
MC Cervantes
P Chaloupka
Z Chang
S Chattopadhyay
HF Chen
JH Chen
JY Chen
L Chen
J Cheng
M Cherney
A Chikanian
W Christie
P Chung
J Chwastowski
MJM Codrington
R Corliss
JG Cramer
HJ Crawford
X Cui
S Das
A Davila Leyva
LC De Silva
RR Debbe
TG Dedovich
J Deng
R Derradi De Souza
S Dhamija
B Di Ruzza
L Didenko
F Ding
A Dion
P Djawotho
X Dong
JL Drachenberg
JE Draper
CM Du
LE Dunkelberger
JC Dunlop
LG Efimov
M Elnimr
J Engelage
G Eppley
L Eun
O Evdokimov
R Fatemi
S Fazio
J Fedorisin
RG Fersch
P Filip
E Finch
Y Fisyak
E Flores
CA Gagliardi
DR Gangadharan
D Garand
F Geurts
A Gibson
S Gliske
OG Grebenyuk
Publication date
3 July 2013
Publisher
eScholarship, University of California
Abstract
Measurements of the elliptic flow, v2, of identified hadrons (π±, K±, Ks0, p, p̄, φ, Λ, Λ̄, Ξ-, Ξ̄+, Ω-, Ω̄+) in Au+Au collisions at √sNN=7.7, 11.5, 19.6, 27, 39, and 62.4 GeV are presented. The measurements were done at midrapidity using the time-projection chamber and the time-of-flight detectors of the Solenoidal Tracker at RHIC experiment during the beam-energy scan program at Relativistic Heavy Ion Collider. A significant difference in the v2 values for particles and the corresponding antiparticles was observed at all transverse momenta for the first time. The difference increases with decreasing center-of-mass energy, √s NN (or increasing baryon chemical potential, μB), and is larger for the baryons as compared to the mesons. This implies that particles and antiparticles are no longer consistent with the universal number-of-constituent quark (NCQ) scaling of v2 that was observed at √sNN=200 GeV. However, for the selected group of particles (π+, K+, Ks0, p, Λ, Ξ-, Ω-) NCQ scaling at (mT-m0)/n q>0.4 GeV/c2 is not violated within ±10%. The v2 values for φ mesons at 7.7 and 11.5 GeV are approximately two standard deviations from the trend defined by the other hadrons at the highest measured pT values. © 2013 American Physical Society
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Last time updated on 25/12/2021