Elliptic Flow at Finite Shear Viscosity in a Kinetic Approach at RHIC
نویسنده
چکیده
Within a covariant parton cascade, we discuss the impact of both finite shear viscosity η and freeze-out dynamics on the elliptic flow generated at RHIC. We find that the enhancement of η/s in the cross-over region of the QGP phase transition cannot be neglected in order to extract the information from the QGP phase. We also point out that the elliptic flow v2(pT ) for a fluid at η/s ∼ 0.1− 0.2 is consistent with the one needed by quark number scaling drawing a nice consistency between the nearly perfect fluid property of QGP and the coalescence process.
منابع مشابه
Differential elliptic flow prediction at the LHC from parton transport
Introduction. General physics arguments and calculations for a class of conformal field theories suggest [1, 2] that quantum effects impose a lower bound on transport coefficients. For example, the shear viscosity to entropy density ratio is above a small value η/s ∼ 0.1 (“most perfect fluid” limit). Dissipative effects can therefore never vanish in a finite, expanding system. On the other hand...
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