Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2006-05-30
Phys.Rev.C74:054901,2006
Physics
Nuclear Physics
Nuclear Theory
12 pages, 5 figures, RevTex4
Scientific paper
10.1103/PhysRevC.74.054901
The ratios of off-diagonal to diagonal conserved charge susceptibilities e.g., chi_{BS}/chi_{S}, chi_{QS}/chi_{S}, related to the quark flavor susceptibilities, have proven to be discerning probes of the flavor carrying degrees of freedom in hot strongly interacting matter. Various constraining relations between the different susceptibilities are derived based on the Gell-Mann-Nishijima formula and the assumption of isospin symmetry. Using generic models of deconfined matter and results form lattice QCD, it is demonstrated that the flavor carrying degrees of freedom at a temperature above 1.5T_c are quark-like quasiparticles. A new observable related by isospin symmetry to C_{BS} = -3chi_{BS}/chi_{S} and equal to it in the baryon free regime is identified. This new observable, which is blind to neutral and non-strange particles, carries the potential of being measured in relativistic heavy-ion collisions.
Majumder Abhijit
Müller Berndt
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