Correlation between direct dark matter detection and Br(B_s -> mu mu) with a large phase of B_s - anti-B_s mixing

TL;DR

This paper explores the relationship between dark matter detection prospects and B_s -> mu mu decay in supersymmetric GUT models with large B_s mixing, highlighting the influence of Higgs mass and flavor constraints.

Contribution

It analyzes the correlation between dark matter detection and B_s -> mu mu decay in minimal supersymmetric GUT models with large mixing phases, considering flavor and Higgs mass constraints.

Findings

Heavy Higgs funnel region is promising for dark matter detection.

Large tan beta enhances B_s -> mu mu decay, but can be suppressed by Higgs mass.

Lepton flavor violation constraints influence Higgs mass and dark matter detection prospects.

Abstract

We combine the analyses for flavor changing neutral current processes and dark matter solutions in minimal-type supersymmetric grand unified theory (GUT) models, SO(10) and SU(5), with a large B_s - anti-B_s mixing phase and large tan beta. For large tan beta, the double penguin diagram dominates the SUSY contribution to the B_s - anti-B_s mixing amplitude. Also, the Br(B_s -> mu mu) constraint becomes important as it grows as tan^6 beta, although it can still be suppressed by large pseudoscalar Higgs mass m_A. We investigate the correlation between B_s -> mu mu and the dark matter direct detection cross-section through their dependence on m_A. In the minimal-type of SU(5) with type I seesaw, the large mixing in neutrino Dirac couplings results in large lepton flavor violating decay process tau to mu gamma, which in turn sets upper bound on m_A. In the SO(10) case, the large mixing can be chosen to be in the Majorana couplings instead, and the constraint from Br(tau -> mu gamma) can be avoided. The heavy Higgs funnel region turns out to be an interesting possibility in both cases and the direct dark matter detection should be possible in the near future in these scenarios.