B-L assisted Anomaly Mediation and the radiative B-L symmetry breaking

TL;DR

This paper proposes extending the MSSM with gauged B-L symmetry to solve the tachyonic slepton problem in anomaly mediation, resulting in positive slepton masses and unique LHC signatures.

Contribution

It introduces a B-L extended anomaly mediation model that naturally resolves the slepton mass issue and predicts distinctive experimental signatures.

Findings

Positive slepton masses due to Z' mediation contributions

Distinctive LHC signatures predicted

Different soft SUSY breaking spectra from conventional models

Abstract

Anomaly mediated supersymmetry breaking implemented in the minimal supersymmetric standard model (MSSM) is known to suffer from the tachyonic slepton problem leading to breakdown of electric charge conservation. We show however that when MSSM is extended to explain small neutrino masses by gauging the B-L symmetry, the slepton masses can be positive due to the Z' mediation contributions. We obtain various soft supersymmetry breaking mass spectra, which are different from those obtained in the conventional anomaly mediation scenario. Then there would be a distinct signature of this scenario at the LHC.