Erratum for "Supersymmetric Electroweak Baryogenesis"

TL;DR

The erratum addresses an overestimate in the baryon asymmetry from MSSM electroweak baryogenesis in the original JHEP paper. The authors correct typographical errors and, crucially, perform a full numerical solution of the diffusion equations rather than relying on Green's-function approximations. In light of LEP2 chargino limits and EDM/Higgs-mass considerations, the corrected analysis indicates that achieving the observed baryon asymmetry requires a nearly maximal CP-violating phase in the chargino sector and a tightly tuned MSSM parameter set. The updated results align with independent work and constrain the viable parameter space for supersymmetric electroweak baryogenesis.

Abstract

We correct a numerical error which led to an overestimate of the baryon asymmetry from supersymmetric electroweak baryogenesis in our paper JHEP07(2000)018. Updated dependences of the baryon asymmetry on chargino mass parameters and the bubble wall velocity are shown. We also include LEP-II-constraints on the chargino mass parameters. Combined with our corrected results for the baryon asymmetry these constraints imply that the phase in the chargino mass matrix must violate CP nearly maximally in order to generate a large enough baryon asymmetry. A number of other typographical errors are also corrected.