Hybrid anomaly-gravity mediation with flavor

TL;DR

This paper explores a hybrid supersymmetry breaking model combining anomaly and gravity mediation to address tachyonic sleptons, suppress flavor violation, and predict distinctive gaugino and slepton mass patterns.

Contribution

It introduces a hybrid anomaly-gravity mediation model with flavor alignment, providing solutions to tachyonic sleptons and the gravitino problem, and predicts unique gaugino and slepton mass signatures.

Findings

Addresses tachyonic slepton problem in anomaly mediation

Predicts distinctive gaugino mass pattern

Shows suppression of flavor violation through alignment

Abstract

We study models with contributions of similar size to the soft masses from anomaly- and gravity mediation, thereby curing the tachyonic slepton problem of anomaly mediation. A possible origin of this hybrid setup in a 5-dimensional brane world is briefly discussed. The absence of excessive flavor violation is explained by alignment. The gravitino can be heavy enough so that the gravitino problem of supersymmetric theories with leptogenesis is avoided. The model has a characteristic signature: It predicts the distinctive gaugino mass pattern of anomaly mediation and, at the same time, O(1) slepton mass splittings.