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arXiv · hep-ph/9812276

Scale of SU(2)_R symmetry breaking and leptogenesis

Ernest Ma·Subir Sarkar·Utpal Sarkar
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Abstract

Models of leptogenesis often invoke the out-of-equilibrium decays of heavy right-handed neutrinos in order to create a baryon asymmetry of the universe through the electroweak phase transition. Their presumed existence argues strongly for the presence of an $SU(2)_R$ gauge symmetry. We study the equilibrating effects of the resulting additional right-handed interactions and find that successful leptogenesis requires that $m_N \gtrsim 10^{16}$ GeV if $m_N > m_{W_R}$, and $m_{W_R} \gtrsim 3 \times 10^6 GeV (m_N /10^2 GeV)^{2/3}$ if $m_{N} m_{W_R}$ option is excluded in a supersymmetric theory with gravitinos.

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Ernest Ma, Subir Sarkar, Utpal Sarkar. 1999-05-09. Scale of SU(2)_R symmetry breaking and leptogenesis. https://doi.org/10.1016/s0370-2693(99)00568-7

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