Can LHC disprove Leptogenesis ?

TL;DR

This paper explores whether future collider detection of a right-handed gauge boson W_R could disprove the leptogenesis theory explaining the universe's matter-antimatter asymmetry.

Contribution

It proposes using future collider observations of W_R to potentially disprove leptogenesis, addressing its current testability limitations.

Findings

Detection of W_R could rule out leptogenesis as the sole origin of baryon asymmetry.

Provides a new approach to test leptogenesis indirectly.

Highlights the importance of collider experiments in fundamental cosmology.

Abstract

Among the mechanisms which successfully explain the generation of the Baryon Asymmetry of the Universe, Leptogenesis through right-handed neutrino decays is especially attractive. Unfortunately, this theory suffers from a lack of testability. Indeed, the high energy relevant ingredients in the asymmetry creation are either indirectly linked to low energy observables or unreachable by our present experiments. We propose here to take the problem the other way around by studying whether this mechanism could at least be disproved. We argue that the observation of a right handed gauge boson W_R at future colliders could play this role.