Leptogenesis from R parity nonconservation

TL;DR

This paper demonstrates that certain R parity nonconserving supersymmetric interactions can generate leptogenesis, providing a novel mechanism for matter-antimatter asymmetry consistent with neutrino oscillation data.

Contribution

It introduces a new leptogenesis mechanism arising from specific R parity nonconserving terms in supersymmetry, which can produce the observed baryon asymmetry.

Findings

Identifies a subset of R parity violating interactions capable of leptogenesis.

Shows these interactions can generate sufficient lepton asymmetry.

Provides a theoretical framework linking neutrino masses and baryogenesis.

Abstract

It is known that realistic neutrino masses for neutrino oscillations may be obtained from R parity nonconserving supersymmetry. It is also known that such interactions would erase any preexisting lepton or baryon asymmetry of the Universe because of the inevitable intervention of the electroweak sphalerons. We now show how a crucial subset of these R parity nonconserving terms may in fact create its own successful leptogenesis.