Shear viscosity of a pion gas resulting from rho pi pi and sigma pi pi interactions

Carregando...
Imagem de Miniatura

Data

2014-04-02

Autores

Ghosh, Sabyasachi [UNESP]
Krein, Gastao [UNESP]
Sarkar, Sourav

Título da Revista

ISSN da Revista

Título de Volume

Editor

Amer Physical Soc

Resumo

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.

Descrição

Palavras-chave

Como citar

Physical Review C. College Pk: Amer Physical Soc, v. 89, n. 4, 7 p., 2014.