Shear viscosity to entropy density ratio in nuclear multifragmentation

Abstract

Nuclear multifragmentation in intermediate energy heavy ion collisions has long been associated with liquid-gas phase transition. We calculate the shear viscosity to entropy density ratio eta/s for an equilibrated system of nucleons and fragments produced in multifragmentation within an extended statistical multifragmentation model. The temperature dependence of eta/s exhibits surprisingly similar behavior as that for water. In the coexistence phase of fragments and light particles, the ratio eta/s reaches a minimum of comparable depth as that for water in the vicinity of the critical temperature for liquid-gas phase transition. The effects of freeze-out volume and surface symmetry energy on eta/s in multifragmentation are studied.

5 pages, 5 figures, to appear in PRC

References in corpus (7)

• Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
• On the Strongly-Interacting Low-Viscosity Matter Created in Relativistic Nuclear Collisions
• Shear viscosity to entropy density ratio of a relativistic Hagedorn resonance gas
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• Comparison of Statistical Multifragmentation Model simulations with Canonical Thermodynamical Model results: a few representative cases
• Effects of geometric constraints on the nuclear multifragmentation process

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• Transport properties of asymmetric nuclear matter in the spinodal region