Baryogenesis from an Earlier Phase Transition

分类： 物理学 >> 基本粒子与场物理学 提交时间： 2017-08-24

Jing Shu Tim M.P. Tait Carlos E.M. Wagner

摘要： We explore the possibility that the observed baryon asymmetry of the universe is the result of an earlier phase transition in which an extended gauge sector breaks down into the SU(3)C × SU(2)L × U(1)Y of the Standard Model. Our prototypical example is the Topflavor model, in which there is a separate SU(2)1 for the third generation from the SU(2)2 felt by the first two generations. We show that the breakdown of SU(2)1 × SU(2)2 → SU(2)L results in lepton number being asymmetrically distributed through-out the three families, and provided the SM electroweak phase transition is not strongly first order, results in a non-zero baryon number, which for parameter choices that can be explored at the LHC, may explain the observed baryon asymmetry.

同行评议状态:待评议

 点击量 2108  下载量 1071  评论