The More Relaxed Supersymmetric Electroweak Baryogenesis
arXiv:hep-ph/9803357 · doi:10.1103/PhysRevD.58.095009
Abstract
We reanalyze the issue of generation of the baryon asymmetry at the electroweak phase transition in the MSSM and compute the baryon asymmetry assuming the presence of non-trivial CP-violating phases in the parameters associated with the left-right stop mixing term and the Higgsino mass . Making use of the closed time-path (CTP) formalism of nonequilibrium field theory, we write down a set of quantum Boltzmann equations describing the local number density asymmetries of the particles involved in supersymmetric electroweak baryogenesis. CP-violating sources manifest ``memory'' effects which are typical of the quantum transport theory and are not present in the classical approach. Compared to previous estimates, these non-Markovian features enhance the final baryon asymmetry by at least two orders of magnitude. This means that a CP-violating phase as small as (or even smaller) is enough to generate the observed baryon asymmetry.
31 pages, LaTeX file
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