Higgs decays in the Two Higgs Doublet Model: Large quantum effects in the decoupling regime

Abstract

We study the Higgs-boson decays h0 -> b \bar{b}, h0 -> γγand h0 -> γZ within the framework of the Two Higgs Doublet Model (THDM) in the context of the decoupling regime, together with tree level unitarity constraints. We show that when the light CP-even Higgs boson of the THDM mimics the Standard-Model Higgs boson, not only the one-loop effects to h0 -> {γγ,γZ} but also the one-loop contribution to h0 -> b \bar{b} can be used to distinguish between THDM and SM. The size of the quantum effects in h0 -> b \bar{b} are of the same order as in h0 -> {γγ,γZ} and can reach 25% in both cases.

LaTeX, 13 pages, 5 figures. Improved text, added references, appendix removed. Version to appear in PLB

References in corpus (7)

• The CP-conserving two-Higgs-doublet model: the approach to the decoupling limit
• New Physics Effect on the Higgs Self-Coupling
• Self-interactions of the lightest MSSM Higgs boson in the large pseudoscalar-mass limit
• Triple and quartic interactions of Higgs bosons in the two-Higgs-doublet model with CP violation
• Electroweak Physics
• Electroweak Precision Data - Global Higgs Analysis
• Decoupling behaviour of O(m_t^4) corrections to the h^0 self-couplings

Cited by in corpus (56)

• h\to γγIn Inert Higgs Doublet Model
• 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
• Probing wrong-sign Yukawa couplings at the LHC and a future linear collider
• Fingerprinting the extended Higgs sector using one-loop corrected Higgs boson couplings and future precision measurements
• Fingerprinting non-minimal Higgs sectors
• Radiative corrections to the Higgs boson couplings in the model with an additional real singlet scalar field
• Measuring extended Higgs sectors as a consistent free couplings model
• Double Neutral Higgs production in the Two-Higgs doublet model at the LHC
• Analysis of an extended scalar sector with $S_3$ symmetry
• Scalar sector properties of two-Higgs-doublet models with a global U(1) symmetry
• Large 2HDM(II) one-loop corrections in leptonic tau decays
• H-COUP: a program for one-loop corrected Higgs boson couplings in non-minimal Higgs sectors
• Two Higgs doublet models for the LHC Higgs boson data at $\sqrt{s}=$ 7 and 8 TeV
• Enhancement of h --> gamma gamma in the Two Higgs Doublet Model Type I
• Nondecoupling of charged scalars in Higgs decay to two photons and symmetries of the scalar potential
• 2HDM Higgs-to-Higgs Decays at Next-to-Leading Order
• Hierarchical vs Degenerate 2HDM: The LHC Run 1 Legacy at the Onset of Run 2
• H-COUP Version 2: a program for one-loop corrected Higgs boson decays in non-minimal Higgs sectors
• Full next-to-leading-order calculations of Higgs boson decay rates in models with non-minimal scalar sectors
• Higgs phenomenology in Type-I 2HDM with U(1)_H Higgs gauge symmetry
• Probing extended Higgs sectors by the synergy between direct searches at the LHC and precision tests at future lepton colliders
• Probing triple Higgs couplings of the Two Higgs Doublet Model at Linear Collider
• The forgotten channels: charged Higgs boson decays to a $W^{\pm }$ and a non-SM-like Higgs boson
• Higgs Self-Coupling in gamma-gamma Collisions
• A reappraisal of the wrong-sign $hb\overline{b}$ coupling and the study of $h\to Z\gamma$
• Loop effects on the Higgs decay widths in extended Higgs models
• One-loop renormalized Higgs vertices in Georgi-Machacek model
• Associated Production of Higgs at Linear Collider in the Inert Higgs Doublet Model
• New benchmark scenarios of electroweak baryogenesis in aligned two Higgs double models
• Double fermiophobic Higgs boson production at the LHC and LC
• Two-loop corrections to the $\rho$ parameter in Two-Higgs-Doublet Models
• Higgs bosons decay into bottom-strange in two Higgs Doublets Models
• Neutral Higgs boson pair production in photon-photon annihilation in the Two Higgs Doublet Model
• Pair Production of Two-Higgs-Doublet_Model Light Higgs Bosons in $\gamma \gamma$ Collisions
• Diphoton and Diboson Probes of Fermiophobic Higgs Bosons at the LHC
• Signature of 2HDM at Higgs Factories
• Single Higgs-boson production through gamma-gamma scattering within the general 2HDM
• Decays of Higgs Bosons in the Standard Model and Beyond
• Alignment, reverse alignment, and wrong sign Yukawa couplings in two Higgs doublet models
• Effect of Charged Scalar Loops on Photonic Decays of a Fermiophobic Higgs
• Exploring multi-Higgs models with softly broken large discrete symmetry groups
• Two-Higgs-Doublet type-II and -III models and $t\to ch$ at the LHC
• Light (and darkness) from a light hidden Higgs
• Sensitivity and constraints to the 2HDM soft-breaking $Z_2$ parameter $m_{12}$
• Single Higgs-boson production at a photon-photon collider: general 2HDM versus MSSM
• Double Higgs boson production at $e^{+}{e}^{-}$ colliders in the two-Higgs-doublet model
• Higgs-like particle decays into $\gamma Z$ and $\gamma \gamma$ : Fingerprints of some non-supersymmetric models
• Next-to-leading order corrections to decays of the heavier CP-even Higgs boson in the two Higgs doublet model
• Radiative corrections to decay branching ratios of the CP-odd Higgs boson in two Higgs doublet models
• Triple Higgs coupling effect on $h^0\to b\bar{b}$ and $h^0\to {\tau }^{+}{\tau }^{-}$ in the 2HDM
• Triple Higgs Coupling as a Probe of the Twin-Peak Scenario
• Indirect reach of heavy MSSM Higgs bosons by precision measurements at future lepton colliders
• Chiral heavy fermions in a two Higgs doublet model: 750 GeV resonance or not
• Radiative corrections to decays of charged Higgs bosons in two Higgs doublet models
• Next-to-leading-order corrections to the Higgs strahlung process from electron-positron collisions in extended Higgs models