Yukawa interactions and supersymmetric electroweak baryogenesis
We analyze the quantum transport equations for supersymmetric electroweak baryogenesis including previously neglected bottom and tau Yukawa interactions and show that they imply the presence of a previously unrecognized dependence of the cosmic baryon asymmetry on the spectrum of third generation quark and lepton superpartners. For fixed values of the CP-violating phases in the supersymmetric theory, the baryon asymmetry can vary in both magnitude and sign as a result of the squark and slepton mass dependence. For light, right-handed top and bottom quark superpartners, the baryon number creation can be driven primarily by interactions involving third generation leptons and their superpartners.
Additional Information© 2009 The American Physical Society. Received 20 August 2008; published 11 February 2009. This work was supported in part by Department of Energy contracts DE-FG02-08ER41531 and DE-FG02- 95ER40896, and the Wisconsin Alumni Research Foundation. D. J. H. C. thanks L. Everett for discussion. PACS numbers: 98.80.Cq, 11.30.Fs, 12.60.Jv
Published - Chung2009p9510.1103PhysRevLett.102.061301.pdf