Affleck-Dine leptogenesis via multiscalar evolution in a supersymmetric seesaw model

TL;DR

This paper explores a leptogenesis mechanism in a supersymmetric seesaw model where lepton asymmetry is generated through the Affleck-Dine process involving right-handed sneutrino condensates and their influence on the LH_u direction.

Contribution

It introduces a novel scenario of leptogenesis via multiscalar evolution in a supersymmetric seesaw model, emphasizing the role of right-handed sneutrino condensates.

Findings

Lepton asymmetry is produced in the right-handed sneutrino condensate.

The LH_u direction acquires a large value due to a negative effective mass.

Lepton asymmetry is transferred nonperturbatively to the LH_u direction.

Abstract

A leptogenesis scenario in a supersymmetric standard model extended with introducing right-handed neutrinos is reconsidered. Lepton asymmetry is produced in the condensate of a right-handed sneutrino via the Affleck-Dine mechanism. The LH_u direction develops large value due to a negative effective mass induced by the right-handed sneutrino condensate through the Yukawa coupling of the right-handed neutrino, even if the minimum during the inflation is fixed at the origin. The lepton asymmetry is nonperturbatively transfered to the LH_u direction by this Yukawa coupling.