High Temperature Dimensional Reduction and Parity Violation
arXiv:hep-ph/9710538 · doi:10.1016/S0370-2693(97)01584-0
Abstract
The effective super-renormalizable 3-dimensional Lagrangian, describing the high temperature limit of chiral gauge theories, has more symmetry than the original 4d Lagrangian: parity violation is absent. Parity violation appears in the 3d theory only through higher-dimensional operators. We compute the coefficients of dominant P-odd operators in the Standard Electroweak theory and discuss their implications. We also clarify the parametric accuracy obtained with dimensional reduction.
12 pages, 1 figure. Small clarifications added. To appear in Phys.Lett.B