Speaker
Srikanta Kumar Tripathy
(Institute of Physics, Bhubaneswar)
Description
Enhanced strange quark production in high-energy heavy-ion collisions relative to p+p col- lisions was proposed as a possible signature of the deconfined phase of quarks and gluons [1]. It was suggested that the dominant process for the production of strange quarks in the quark gluon plasma is gluonic fusion. Chemical equilibration of strange quarks formed in such medium happens faster than would be the situation in hadronic scenario [2].
With 20% larger energy density expected [3] and a larger lifetime of fireball than Au+Au collisions, we can have a better insight of testing these facts in U+U collisions.
We will present transverse momentum (pT ) spectra of Ks , Λ(Λ ̄) and Ξ(Ξ ̄) in U+U collisions at √sNN = 193 GeV in STAR experiment at RHIC. These strange particles are reconstructed from their weak decay topology via dominant hadronic decay modes using the Time Projection Chamber(TPC) detector of STAR. Measured masses of these particles are consistent with PDG values. A clear centrality dependence of pT spectra is observed for these particles. We’ll also show comparison of these results with Au+Au 200 GeV results.
References
[1] J. Rafelski and B. Muller, Phys. Rev. Lett. 48,1066 (1982)
[2] P. Koch, B. Muller and J. Rafelski, Phys. Rep. 142, 167 (1986)
[3] D. Kikoa, G. Odyniec, and R. Vogt, Phys. Rev. C 84,054907,(2011)
| On behalf of collaboration: | STAR |
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Primary author
Srikanta Kumar Tripathy
(Institute of Physics, Bhubaneswar)
