High Energy Physics Journal Club
Report on: The Bulk Viscosity of a Pion Gas
by Sourendu Gupta
Friday, February 4, 2011
from
to
(Asia/Kolkata)
at Colaba Campus ( A-304 )
at Colaba Campus ( A-304 )
Description |
Authors: Egang Lu, Guy D. Moore Abstract: We compute the bulk viscosity of a gas of pions at temperatures below the QCD crossover temperature, for the physical value of pion mass, to lowest order in chiral perturbation theory. Bulk viscosity is controlled by number-changing processes which become exponentially slow at low temperatures when the pions become exponentially dilute, leading to an exponentially large bulk viscosity zeta ~ (F_0^8/m_\pi^5) exp(2m_\pi/T), where F_0 = 93 MeV is the pion decay constant. |
Participants | Arka Banerjee; Debasish Banerjee; Raju Bathija; Rajeev Bhalerao; Biplob Bhattacharjee; Sudhansu Biswal; Saumen Datta; Amol Dighe; Rajiv V. Gavai; Diptimoy Ghosh; Monoranjan Guchait; Sourendu Gupta; Vinod Joshi; Sridhar K.; Nikhil Karthik; Padmanath M.; Nilmani Mathur; Shiraz Minwalla; Subroto Pal; Sreerup Raychaudhuri; Sayantan Sarma; Anurag Tripathi |
Material: |