The coupling of the lightest SUSY Higgs boson to two photons in the decoupling regime

Abstract

We analyze the contribution of the SUSY particles to the coupling of the lightest Higgs boson to two photons in supersymmetric theories. We discuss to what extent these contributions can be large enough to allow for a discrimination between the lightest SUSY and the standard Higgs particles in the decoupling limit where all other Higgs bosons are very heavy and no supersymmetric particle has been discovered at future colliders. We find that only chargino and top squark loops can generate a sizeable difference between the standard and the SUSY Higgs-photon couplings. For masses above 250 GeV, the effect of chargino loops on the two-photon width is however smaller than $\sim 10$ in the entire SUSY parameter space. Top squarks heavier than 250 GeV can induce deviations larger than 10% only if their couplings to the Higgs boson are large. Since top squark contributions can be sizeable, we derive the two-loop QCD correction to squark loops and show that they are well under control.

30 pages, LaTeX, 8 figures, the complete *.ps file can be found at http://itpaxp1.physik.uni-karlsruhe.de/prep/prep.html

Cited by in corpus (66)

• The CP-conserving two-Higgs-doublet model: the approach to the decoupling limit
• Implications of a 125 GeV Higgs for the MSSM and Low-Scale SUSY Breaking
• Dark Matter through the Higgs portal
• The Higgs sector of the phenomenological MSSM in the light of the Higgs boson discovery
• h\to γγIn Inert Higgs Doublet Model
• TESLA Technical Design Report, Part VI, Chapter 1: The Photon Collider at TESLA
• The post-Higgs MSSM scenario: Habemus MSSM?
• Probing the Electroweak Phase Transition with Higgs Factories and Gravitational Waves
• Higgs boson decay into 2 photons in the type~II Seesaw Model
• Enhancement of H to gamma gamma from doubly charged scalars in the Higgs Triplet Model
• An update of the constraints on the phenomenological MSSM from the new LHC Higgs results
• Higgs Boson Production and Decay at Hadron Colliders
• Squark Effects on Higgs Boson Production and Decay at the LHC
• Limits on Anomalous Couplings of the Higgs to Electroweak Gauge Bosons from LEP and LHC
• Constraints on the MSSM from the Higgs Sector - A pMSSM Study of Higgs Searches, Bs -> mu+ mu- and Dark Matter Direct Detection
• NMSSMCALC: A Program Package for the Calculation of Loop-Corrected Higgs Boson Masses and Decay Widths in the (Complex) NMSSM
• Higgs Boson Production via Gluon Fusion: Squark Loops at NLO QCD
• NSUSY fits
• The MSSM with heavy scalars
• Excluding Electroweak Baryogenesis in the MSSM
• A Higgs or Not a Higgs? What to Do if You Discover a New Scalar Particle
• Natural SUSY Predicts: Higgs Couplings
• Distinguishing a MSSM Higgs Boson from the SM Higgs Boson at a Linear Collider
• Two-loop electroweak corrections to the Higgs-boson decay H -> gamma gamma
• Higgs decays in the Two Higgs Doublet Model: Large quantum effects in the decoupling regime
• Gold-plated processes at photon colliders
• Detection of MSSM Higgs bosons from supersymmetric particle cascade decays at the LHC
• The MSSM Higgs bosons in the intense-coupling regime
• Flavour Changing Neutral Higgs Boson Decays from Squark - Gluino Loops
• Natural Supersymmetry and Implications for Higgs physics
• LHC diphoton Higgs signal and top quark forward-backward asymmetry in quasi-inert Higgs doublet model
• Implications of the Higgs discovery for the MSSM
• SUSY Faces its Higgs Couplings
• On Higgs Decays, Baryon Number Violation, and SUSY at the LHC
• Very Light Charginos and Higgs Decays
• Higgs Boson Production at the Compton Collider
• New benchmark scenarios of electroweak baryogenesis in aligned two Higgs double models
• Light Higgs Production at a Photon Collider
• MSSM: Cornered and Correlated
• Light Higgs production at the Compton Collider
• Doubling Up on Supersymmetry in the Higgs Sector
• Leptophilic fermion WIMP ~ Role of future lepton colliders
• Can we distinguish between h^{SM} and h^0 in split supersymmetry?
• Higgs bosons decay into bottom-strange in two Higgs Doublets Models
• The Higgs boson in the MSSM in light of the LHC
• Implications of the Higgs Discovery in the MSSM Golden Region
• Higgs boson decays into γγ and Zγ in the MSSM and BLSSM
• Charged Higgs Bosons decays H^\pm \to W^\pm (γ, Z) revisited
• Associated Production of Higgs Bosons with Scalar Quarks at Future Hadron and $e^{+}{e}^{-}$ Colliders
• Decays of Higgs Bosons in the Standard Model and Beyond
• Higgs Boson Decay into Hadronic Jets
• The Order $\mathcal{O}({\alpha }_t{\alpha }_s)$ Corrections to the Trilinear Higgs Self-Couplings in the Complex NMSSM
• The Higgs sector of supersymmetric theories and the implications for high-energy colliders
• Light Stop Mass Limits from Higgs Rate Measurements in the MSSM: Is MSSM Electroweak Baryogenesis Still Alive After All?
• Into the multi-TeV scale with a Higgs golden ratio
• Next-to-Leading Order NMSSM Decays with CP-odd Higgs Bosons and Stops
• CP--violating Chargino Contributions to the Higgs Coupling to Photon Pairs in the Decoupling Regime of Higgs Sector
• Light stop/sbottom pair production searches in the NMSSM
• On the discovery potential of the lightest MSSM Higgs Boson at the LHC
• The hMSSM with a Light Gaugino/Higgsino Sector: Implications for Collider and Astroparticle Physics
• Precision Higgs physics at a $\gamma \gamma$ collider
• Damped $\sin (\beta -\alpha )$ of Higgs couplings and the lightest Higgs production at $\gamma \gamma$ colliders in MSSM
• Left-Right squarks mixings effects in Charged Higgs Bosons decays $H^{\pm }\to W^{\pm }(\gamma ,Z)$ in the MSSM
• Resolved Photon Contributions to Higgs Boson Production in gamma gamma Collisions
• Decoupling property of the supersymmetric Higgs sector with four doublets
• Electroweak Symmetry Breaking at the LHC