Evolution of the differential transverse momentum correlation function with centrality in Au+Au collisions at sNN=200 GeV

0366919 - ÚJF 2012 RIV NL eng J - Článek v odborném periodiku
Aggarwal, M. M. - Agakishiev, G. - Ahammed, Z. - Chaloupka, Petr - Chung, P. - Kouchpil, V. - Rusnak, J. - Šumbera, Michal - Tlustý, David - Bielčíková, Jana - Bielčík, J. … celkem 366 autorů
Evolution of the differential transverse momentum correlation function with centrality in Au+Au collisions at sNN=200 GeV.
Physics Letters. B. Roč. 704, č. 5 (2011), s. 467-473. ISSN 0370-2693. E-ISSN 1873-2445
Grant CEP: GA MŠMT LA09013
Výzkumný záměr: CEZ:AV0Z10480505
Klíčová slova: Azimuthal correlations * Heavy ion collisions * QGP
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 3.955, rok: 2011

We present first measurements of the evolution of the differential transverse momentum correlation function, C, with collision centrality in Au. +. Au interactions at sNN=200 GeV. This observable exhibits a strong dependence on collision centrality that is qualitatively similar to that of number correlations previously reported. We use the observed longitudinal broadening of the near-side peak of C with increasing centrality to estimate the ratio of the shear viscosity to entropy density, η/s, of the matter formed in central Au. +. Au interactions. We obtain an upper limit estimate of η/s that suggests that the produced medium has a small viscosity per unit entropy.
Trvalý link: http://hdl.handle.net/11104/0201746