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Elliptic flow of identified hadrons in Au+Au collisions at sqrt sNN =200 GeV |
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| Authors: | Adler S S Afanasiev S Aidala C Ajitanand N N Akiba Y Alexander J Amirikas R Aphecetche L Aronson S H Averbeck R Awes T C Azmoun R Babintsev V Baldisseri A Barish K N Barnes P D Bassalleck B Bathe S Batsouli S Baublis V Bazilevsky A Belikov S Berdnikov Y Bhagavatula S Boissevain J G Borel H Borenstein S Brooks M L Brown D S Bruner N Bucher D Buesching H Bumazhnov V Bunce G Burward-Hoy J M Butsyk S Camard X Chai J-S Chand P Chang W C Chernichenko S Chi C Y Chiba J Chiu M Choi I J Choi J Choudhury R K Chujo T Cianciolo V Cobigo Y Cole B A Constantin P D'Enterria D G David G Delagrange H |
| Affiliation: | Brookhaven National Laboratory, Upton, New York 11973-5000, USA. |
| Abstract: | The anisotropy parameter (v(2)), the second harmonic of the azimuthal particle distribution, has been measured with the PHENIX detector in Au+Au collisions at sqrt[s(NN)]=200 GeV for identified and inclusive charged particle production at central rapidities (|eta|<0.35) with respect to the reaction plane defined at high rapidities (|eta|=3-4 ). We observe that the v(2) of mesons falls below that of (anti)baryons for p(T)>2 GeV/c, in marked contrast to the predictions of a hydrodynamical model. A quark-coalescence model is also investigated. |
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