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Statements

Subject Item
n2:RIV%2F68407700%3A21340%2F13%3A00208079%21RIV14-MSM-21340___
rdf:type
n11:Vysledek skos:Concept
rdfs:seeAlso
http://arxiv.org/pdf/1301.2348.pdf
dcterms:description
Measurements of the elliptic flow, upsilon(2), of identified hadrons (pi(+/-), K-+/-, K-s(0), p, (p) over bar, phi, Lambda, (Lambda) over bar, Xi(-), (Xi) over bar (+), Omega(-), (Omega) over bar (+)) in Au + Au collisions at root s(NN) = 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 upsilon(2) 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, root s(NN) (or increasing baryon chemical potential, mu(B)), 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 upsilon(2) that was observed at root s(NN) = 200 GeV. However, for the selected group of particles (p(+), K+, K-s(0), p, Lambda, Xi(-), Omega(-)) NCQ scaling at (m(T) - m(0))/n(q) > 0.4 GeV/c(2) is not violated within +/- 10%. The upsilon(2) values for f 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 p(T) values. Measurements of the elliptic flow, upsilon(2), of identified hadrons (pi(+/-), K-+/-, K-s(0), p, (p) over bar, phi, Lambda, (Lambda) over bar, Xi(-), (Xi) over bar (+), Omega(-), (Omega) over bar (+)) in Au + Au collisions at root s(NN) = 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 upsilon(2) 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, root s(NN) (or increasing baryon chemical potential, mu(B)), 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 upsilon(2) that was observed at root s(NN) = 200 GeV. However, for the selected group of particles (p(+), K+, K-s(0), p, Lambda, Xi(-), Omega(-)) NCQ scaling at (m(T) - m(0))/n(q) > 0.4 GeV/c(2) is not violated within +/- 10%. The upsilon(2) values for f 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 p(T) values.
dcterms:title
Elliptic flow of identified hadrons in Au + Au collisions at root s(NN)=7.7-62.4 GeV Elliptic flow of identified hadrons in Au + Au collisions at root s(NN)=7.7-62.4 GeV
skos:prefLabel
Elliptic flow of identified hadrons in Au + Au collisions at root s(NN)=7.7-62.4 GeV Elliptic flow of identified hadrons in Au + Au collisions at root s(NN)=7.7-62.4 GeV
skos:notation
RIV/68407700:21340/13:00208079!RIV14-MSM-21340___
n11:predkladatel
n15:orjk%3A21340
n3:aktivita
n19:Z n19:S n19:P n19:I
n3:aktivity
I, P(GA13-20841S), S, Z(MSM6840770039)
n3:cisloPeriodika
1
n3:dodaniDat
n4:2014
n3:domaciTvurceVysledku
n12:9624090 n12:8029415 Bielčík, Jaroslav n12:2917688
n3:druhVysledku
n21:J
n3:duvernostUdaju
n14:S
n3:entitaPredkladatele
n13:predkladatel
n3:idSjednocenehoVysledku
72603
n3:idVysledku
RIV/68407700:21340/13:00208079
n3:jazykVysledku
n22:eng
n3:klicovaSlova
ELATIVISTIC NUCLEAR COLLISIONS; HEAVY-ION COLLISIONS; QUARK-GLUON PLASMA; STRANGE PARTICLES; STAR; COLLABORATION; ANISOTROPY; SIGNATURE; ENERGY; MODELS
n3:klicoveSlovo
n5:ANISOTROPY n5:HEAVY-ION%20COLLISIONS n5:STRANGE%20PARTICLES n5:SIGNATURE n5:STAR n5:MODELS n5:ENERGY n5:ELATIVISTIC%20NUCLEAR%20COLLISIONS n5:COLLABORATION n5:QUARK-GLUON%20PLASMA
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[F60063562F98]
n3:nazevZdroje
Physical Review C
n3:obor
n20:BG
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
362
n3:projekt
n7:GA13-20841S
n3:rokUplatneniVysledku
n4:2013
n3:svazekPeriodika
88
n3:tvurceVysledku
Chaloupka, Petr Pachr, Miloš Adamczyk, L. Agakishiev, G. Bielčík, Jaroslav Ahammed, Z. Adkins, J. K. Aggarwal, M. M. Hájková, Olga
n3:wos
000321270800003
n3:zamer
n10:MSM6840770039
s:issn
0556-2813
s:numberOfPages
33
n16:doi
10.1103/PhysRevC.88.014902
n18:organizacniJednotka
21340