Shear viscosity of a pion gas resulting from rho pi pi and sigma pi pi interactions
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
03/12/2014
03/12/2014
02/04/2014
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Resumo |
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Processo FAPESP: 09/50180-0 Processo FAPESP: 12/16766-0 Processo FAPESP: 13/01907-0 We have evaluated the shear viscosity of pion gas with vanishing chemical potential taking into account its scattering with the low mass resonances sigma and rho during propagation in the medium. The thermal width (or collisional rate) of pions is calculated from pi sigma and pi rho loop diagrams using effective interactions in the real-time formulation of finite temperature field theory. A very small value of shear viscosity by entropy density ratio (eta/s), close to the quantum bound, is obtained which approximately matches the range of values eta/s used by Niemi et al. [H. Niemi, G. S. Denicol, P. Huovinen, E. Molnar, and D. H. Rischke, Phys. Rev. Lett. 106, 212302 (2011); Phys. Rev. C 86, 014909 (2012)] to fit the elliptic flow data from the Relativistic Heavy Ion Collider. |
Formato |
7 |
Identificador |
http://dx.doi.org/10.1103/PhysRevC.89.045201 Physical Review C. College Pk: Amer Physical Soc, v. 89, n. 4, 7 p., 2014. 0556-2813 http://hdl.handle.net/11449/113014 10.1103/PhysRevC.89.045201 WOS:000334295700001 WOS000334295700001.pdf |
Idioma(s) |
eng |
Publicador |
Amer Physical Soc |
Relação |
Physical Review C |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |