The Sphaleron rate: Bodeker's leading log
Oct, 199834 pages
Published in:
- Nucl.Phys.B 568 (2000) 367-404
e-Print:
- hep-ph/9810313 [hep-ph]
Report number:
- MCGILL-98-28
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Abstract:
Bodeker has recently shown that the high temperature sphaleron rate, which measures baryon number violation in the hot standard model, receives logarithmic corrections to its leading parametric behavior; Gamma = kappa' [log(m_D / g^2 T) + O(1)] (g^2 T^2 / m_D^2) \alpha_W^5 T^4. After discussing the physical origin of these corrections, I compute the leading log coefficient numerically; kappa' = 10.8 pm 0.7. The log is fairly small relative to the O(1) ``correction;'' so nonlogarithmic contributions dominate at realistic values of the coupling.- sphaleron
- baryon number: violation
- Wilson loop
- leading logarithm approximation
- gauge field theory: Yang-Mills
- finite temperature
- lattice field theory
- Chern-Simons number
- infrared problem
- gauge field theory: SU(2)
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