SUSY Enhancement of Heavy Higgs Production

TL;DR

This paper investigates how heavy Higgs production at the LHC can be enhanced through supersymmetric effects, particularly squark contributions, within the MSSM framework, considering different unification scenarios and their phenomenological implications.

Contribution

It demonstrates that relaxing Higgs sector unification allows for significant squark contributions to Higgs production, providing new insights into supersymmetric effects at the LHC.

Findings

Squark contributions can enhance heavy Higgs production by several times.

Universal mSUGRA scenarios require large negative A_0, conflicting with b->s gamma constraints.

Non-universal Higgs scenarios can satisfy all constraints and increase cross-section.

Abstract

We study the cross-section of heavy Higgs production at the LHC within the framework of the Constrained MSSM. It is not only enhanced by tan^2 beta but sometimes is also enhanced by the squark contribution. First, we consider the universal scenario within mSUGRA and find out that to get the desired enhancement one needs large negative values of A_0, which seems to be incompatible with the b->s gamma decay rate. To improve the situation, we release the unification requirement in the Higgs sector. Then it becomes possible to satisfy all requirements simultaneously and enhance the squark contribution. The latter can gain a factor of several units increasing the overall cross-section which, however, is still smaller than the cross-section of the associated H b bbar production. We consider also some other consequences of the chosen benchmark point.