Protecting the Primordial Baryon Asymmetry From Erasure by Sphalerons

James M. Cline , Kimmo Kainulainen , Keith A. Olive

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classification ✦ hep-ph

keywords asymmetrybaryonboundssphaleronscouplingcreateddrasticallyelaborate

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If the baryon asymmetry of the universe was created at the GUT scale, sphalerons together with exotic sources of $(B-L)$-violation could have erased it, unless the latter satisfy stringent bounds. We elaborate on how the small Yukawa coupling of the electron drastically weakens previous estimates of these bounds.

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