Higgs boson in a flavor-extension of the CMSSM

TL;DR

This paper explores how flavor-violating Higgs couplings within the CMSSM can influence Higgs mass, dark matter relic density, and supersymmetry parameters, using Bayesian analysis with experimental data.

Contribution

It introduces a detailed Bayesian analysis of flavor-violating couplings in the CMSSM, highlighting their impact on model parameters and comparing with flavor-conserving scenarios.

Findings

Most probable SUSY parameters are around 4.83 TeV for m0 and 2.54 TeV for m1/2.

The lightest neutralino mass is approximately 1 TeV.

Bayes factor indicates moderate preference for the flavor-violating model.

Abstract

Flavour-violating couplings of Higgs boson with stop and scharm quarks could be very important as in addition to lifting the mass of the Higgs boson by a few GeV, it could also play a vital phenomenological role in reducing the Supersymmetry breaking scale significantly. In this work, we investigate effects of such flavour-violating couplings within the Constrained Minimal Supersymmetric Standard Model (CMSSM) framework in the context of LEP data, Higgs data at the LHC, precision observables and the relic density of the dark matter using Bayesian statistics. Our detailed analysis reveals that the most probable values of $m_{0}$, $m_{1/2}$, $A_{0}$, $\tan{\beta}$, $\delta^{LR}_{ct}$ are expected to be around 4.83 TeV, 2.54 TeV, 1.90 TeV, 41.5, and 6.1$\times10^{-2}$, respectively, with flat priors. The corresponding values translate into 3.25 TeV, 2.13 TeV, 1.90 TeV, 44.7, and 5.9$\times10^{-2}$, respectively, if the natural priors are used. Furthermore, a comparison of our model with the CMSSM of flavour-conservation as the base model yields a Bayes factor of about 6 while taking into account all the experimental constraints used in our study. Our analysis also reflects that the lightest neutralino would have a mass of about 1 TeV.