Search for Higgs Bosons in SUSY Cascades in CMS and Dark Matter with Non-universal Gaugino Masses

TL;DR

This paper explores how non-universal gaugino masses in GUT models influence the production and detection of MSSM Higgs bosons in SUSY cascade decays at the LHC, with implications for dark matter.

Contribution

It investigates the impact of non-universal gaugino masses on Higgs boson production in SUSY cascades and dark matter relic density constraints.

Findings

Heavy Higgs bosons can be produced in SUSY cascades with non-universal gaugino masses.

Non-universal gaugino masses can lead to detectable heavy Higgs signals at the LHC.

Combination of gaugino representations can satisfy dark matter relic density constraints.

Abstract

In grand unified theories (GUT), non-universal boundary conditions for the gaugino masses may arise at the unification scale, and affect the observability of the neutral MSSM Higgs bosons (h/H/A) at the LHC. The implications of such non-universal gaugino masses are investigated for the Higgs boson production in the SUSY cascade decay chain gluino --> squark quark, squark --> neutralino_2 quark, neutralino_2 --> neutralino_1 h/H/A, h/H/A --> b b-bar produced in pp interactions. In the singlet representation with universal gaugino masses only the light Higgs boson can be produced in this cascade with the parameter region of interest for us, while with non-universal gaugino masses heavy neutral MSSM Higgs boson production may dominate. The allowed parameter space in the light of the WMAP constraints on the cold dark matter relic density is investigated in the above scenarios for gaugino mass parameters. We also demonstrate that combination of representations can give the required amount of dark matter in any point of the parameter space. In the non-universal case we show that heavy Higgs bosons can be detected in the studied cascade in parameter regions with the WMAP preferred neutralino relic density.