Cosmological Charge Asymmetry and Rare Processes in Particle Physics

TL;DR

This paper explores low temperature baryogenesis in TeV scale gravity theories, highlighting the potential for observable neutron-antineutron oscillations and suppressed proton decay, with implications for rare particle decays.

Contribution

It introduces two scenarios of baryogenesis compatible with TeV scale gravity, emphasizing their experimental testability through rare processes.

Findings

Neutron-antineutron oscillations near detection threshold

Proton decay is suppressed below current bounds

Predictions of rare lepton and baryon number violating decays

Abstract

Two scenarios of low temperature baryogenesis in theories with TeV scale gravity are discussed. It is argued that strong gravity at TeV energies is very favorable for baryogenesis. In both scenarios the proton decay is either absent or suppressed far below existing bounds. On the other hand, neutron-antineutron oscillations are at the verge of discovery. Some other rare decays with non-conservation of lepton or baryon numbers are predicted.