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Published April 1, 2005 | Published
Journal Article Open

Resonant relaxation in electroweak baryogenesis


We compute the leading, chiral charge-changing relaxation term in the quantum transport equations that govern electroweak baryogenesis using the closed time path formulation of nonequilibrium quantum field theory. We show that the relaxation transport coefficients may be resonantly enhanced under appropriate conditions on electroweak model parameters and that such enhancements can mitigate the impact of similar enhancements in the CP-violating source terms. We also develop a power counting in the time and energy scales entering electroweak baryogenesis and include effects through second order in ratios epsilon of the small and large scales. We illustrate the implications of the resonantly enhanced [script O](epsilon 2) terms using the Minimal Supersymmetric Standard Model, focusing on the interplay between the requirements of baryogenesis and constraints obtained from collider studies, precision electroweak data, and electric dipole moment searches.

Additional Information

© 2005 The American Physical Society. Received 15 January 2005; published 22 April 2005. We are grateful to Christian Bauer, Gerald Dunne, and Mark Wise for useful discussions and to Michael Graesser for detailed reading of the manuscript and useful feedback. The authors are grateful for the support from the Institute for Nuclear Theory, where part of this work was completed. This work was supported in part by the U.S. Department of Energy under Contracts No. DE-FG03-02ER41215 and No. DE-FG03-92ER40701, in part by the National Science Foundation under Grant No. PHY00-71856, and in part by the U.S. Department of Defense (C.L.).

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August 22, 2023
August 22, 2023