On the effective dynamics of soft nonAbelian gauge fields at finite temperature

Jan, 1998
16 pages
Published in:
  • Phys.Lett.B 426 (1998) 351-360
e-Print:
Report number:
  • HD-THEP-98-04

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Abstract:
We consider time dependent correlation functions of non-abelian gauge fields at finite temperature. An effective theory for the soft (pg2Tp\sim g^2 T) field modes is derived by integrating out the field modes with momenta of order TT and of order gTg T in a leading logarithmic approximation. In this effective theory the time evolution of the soft fields is determined by a local Langevin-type equation. As an application, the rate for hot electroweak baryon number violation is estimated as Γg2log(1/g)(g2T)4\Gamma \sim g^2 \log(1/g) (g^2 T)^4. Furthermore, possible consequences for non-perturbative lattice computations of unequal time correlation functions are discussed.
Note:
  • LaTeX, 15 pages, 3 postscript figures, uses epsf.sty; title shortened, some typos corrected, one reference changed, one reference added, to appear in Phys. Lett. B Report-no: HD-THEP-98-04
  • 11.10.Wx
  • 11.15.Kc
  • 11.30.Fs
  • Finite temperature
  • Real time correlation functions
  • Non-Abelian gauge theory
  • Non-perturbative
  • Baryon number violation
  • Lattice
  • gauge field theory: Yang-Mills