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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Ghosh, Sabyasachi [1] ; Krein, Gastao [1] ; Sarkar, Sourav [2]
Total Authors: 3
[1] Univ Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo - Brazil
[2] Ctr Variable Energy Cyclotron, Div Theoret Phys, Kolkata 700064 - India
Total Affiliations: 2
Document type: Journal article
Source: Physical Review C; v. 89, n. 4 APR 2 2014.
Web of Science Citations: 9

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. (AU)

FAPESP's process: 13/01907-0 - São Paulo Research and Analysis Center
Grantee:Sergio Ferraz Novaes
Support type: Research Projects - Thematic Grants
FAPESP's process: 09/50180-0 - Study of hadronic interactions at high energies
Grantee:Yogiro Hama
Support type: Research Projects - Thematic Grants
FAPESP's process: 12/16766-0 - Spectral and transport properties of charmed mesons in hot and dense hadronic matter
Grantee:Sabyasachi Ghosh
Support type: Scholarships in Brazil - Post-Doctorate