Small shear viscosity of a quark-gluon plasma implies strong jet quenching |
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Authors: | Majumder Abhijit Müller Berndt Wang Xin-Nian |
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Institution: | Department of Physics, Duke University, Durham, NC 27708, USA. |
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Abstract: | We derive an expression relating the transport parameter q and the shear viscosity eta of a weakly coupled quark-gluon plasma. A deviation from this relation can be regarded as a quantitative measure of "strong coupling" of the medium. The ratio T{3}/q, where T is the temperature, is a more broadly valid measure of the coupling strength of the medium than eta/s, where s denotes the entropy density. Different estimates of q derived from existing Relativistic Heavy Ion Collider data are shown to imply radically different structures of the produced matter. |
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