Elliptic flow of identified hadrons in Au+Au collisions at √s <inf>NN</inf>=7.7-62.4 GeV
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Journal ArticleDate
2013-07-03Author
Adamczyk, LAdkins, JK
Agakishiev, G
Aggarwal, MM
Ahammed, Z
Alekseev, I
Alford, J
Anson, CD
Aparin, A
Arkhipkin, D
Aschenauer, E
Averichev, GS
Balewski, J
Banerjee, A
Barnovska, Z
Beavis, DR
Bellwied, R
Betancourt, MJ
Betts, RR
Bhasin, A
Bhati, AK
Bhattarai, P
Bichsel, H
Bielcik, J
Bielcikova, J
Bland, LC
Bordyuzhin, IG
Borowski, W
Bouchet, J
Brandin, AV
Brovko, SG
Bruna, E
Bültmann, S
Bunzarov, I
Burton, TP
Butterworth, J
Cai, XZ
Caines, H
Calderón De La Barca Sánchez, M
Cebra, D
Cendejas, R
Cervantes, MC
Chaloupka, P
Chang, Z
Chattopadhyay, S
Chen, HF
Chen, JH
Chen, JY
Chen, L
Cheng, J
Cherney, M
Chikanian, A
Christie, W
Chung, P
Chwastowski, J
Codrington, MJM
Corliss, R
Cramer, JG
Crawford, HJ
Cui, X
Das, S
Davila Leyva, A
De Silva, LC
Debbe, RR
Dedovich, TG
Deng, J
Derradi De Souza, R
Dhamija, S
Di Ruzza, B
Didenko, L
Ding, F
Dion, A
Djawotho, P
Dong, X
Drachenberg, JL
Draper, JE
Du, CM
Dunkelberger, LE
Dunlop, JC
Efimov, LG
Elnimr, M
Engelage, J
Eppley, G
Eun, L
Evdokimov, O
Fatemi, R
Fazio, S
Fedorisin, J
Fersch, RG
Filip, P
Finch, E
Fisyak, Y
Flores, E
Gagliardi, CA
Gangadharan, DR
Garand, D
Geurts, F
Gibson, A
Gliske, S
Grebenyuk, OG
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http://hdl.handle.net/20.500.12613/5953
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10.1103/PhysRevC.88.014902Abstract
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.Citation to related work
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http://dx.doi.org/10.34944/dspace/5935