Correlation between the decays $h^0\to \gamma \gamma /gg$ in the MSSM with quark flavour violation

Abstract

We study the loop-induced decays $h^0\to \gamma \gamma$ and $h^0\to gg$ in the Minimal Supersymmetric Standard Model (MSSM) with quark flavour violation (QFV), identifying $h^0$ with the Higgs boson with a mass of 125 GeV, where $\gamma$ and $g$ are photon and gluon, respectively. We perform a MSSM parameter scan and a detailed analysis around a fixed reference point respecting theoretical constraints from vacuum stability conditions and experimental constraints, such as those from B meson data and electroweak precision data, as well as recent limits on supersymmetric (SUSY) particle masses from LHC experiments. We find that (i) the relative deviation of the decay width $\Gamma (h^0\to gg)$ from the Standard Model value, $DEV(g)$, can be large and negative, $\lesssim -15\%$, (ii) the analogous deviation of $\Gamma (h^0\to \gamma \gamma )$ is strongly correlated, $DEV(\gamma )\simeq -1/4DEV(g)$ for $DEV(g)\lesssim -4\%$, (iii) the relative deviation of the width ratio $\Gamma (h^0\to \gamma \gamma )/\Gamma (h^0\to gg)$ from the SM value, $DEV(\gamma /g)$, can be large (up to $\sim$ 20\%), (iv) the deviations can be large due to the up-type squark loop contributions, (v) the SUSY QFV parameters can have a significant effect on these deviations. Such large deviations can be observed at a future $e^{+}{e}^{-}$ collider like ILC. Observation of the deviation patterns as shown in this study would favour the MSSM with flavour-violating squark mixings and encourage to perform further studies in this model.

Version accepted for publication in IJMPA

References in corpus (17)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Combined Measurement of the Higgs Boson Mass in $pp$ Collisions at $\sqrt{s}=7$ and 8 TeV with the ATLAS and CMS Experiments
• Higgs boson gluon-fusion production in N3LO QCD
• NLO Electroweak Corrections to Higgs Boson Production at Hadron Colliders
• Combined measurements of Higgs boson couplings in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Updated NNLO QCD predictions for the weak radiative B-meson decays
• Search for direct production of charginos, neutralinos and sleptons in final states with two leptons and missing transverse momentum in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
• Searches for electroweak production of charginos, neutralinos, and sleptons decaying to leptons and W, Z, and Higgs bosons in pp collisions at 8 TeV
• Search for additional neutral MSSM Higgs bosons in the $\tau \tau$ final state in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Logarithmically Enhanced Corrections to the Decay Rate and Forward Backward Asymmetry in anti-B --> X(s) l+ l-
• Measurements of Higgs boson properties in the diphoton decay channel in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Higgs Decay to Gluons at NNLO
• Rare Top-quark Decays to Higgs boson in MSSM
• Neutral MSSM Higgs-boson production with heavy quarks: NLO supersymmetric QCD corrections
• $h^0\to c\bar{c}$ as a test case for quark flavor violation in the MSSM
• Footprints of Supersymmetry on Higgs Decay

Cited by in corpus (2)

• Imprint of SUSY in radiative B-meson decays
• Impact of quark flavor violating SUSY on h(125) decays at future lepton colliders