Lessons from LHC on the LFV Higgs decays $h\to {\ell }_a{\ell }_b$ in the Two-Higgs Doublet Models

Abstract

The non-conservation of the lepton number has been explored at the LHC through the Lepton-Flavor Violating (LFV) Higgs decays $h\to {\ell }_a{\ell }_b$, with ${\ell }_{a,b}=e,\mu ,\tau$ $(a\ne b)$. Current limits on these decays are a source of valuable information on the structure of the Yukawa and Higgs sectors. The LFV Higgs couplings can arise within the general Two-Higgs Doublet Model (2HDM); the predicted rates for these decay modes depend on the specific Yukawa structure being considered, ranging from a vanishing branching ratio at tree-level for some versions (2HDM-I, II, X, Y), up to large and detectable ratios within the general 2HDM-III. An attractive scenario is given by the texturized version of the model (2HDM-Tx), with the Yukawa matrices having some texture zeros, such as the minimal version with the so-called Cheng-Sher ansazt. We study the constraints on the parameter space of the 2HDM provided by experimental and theoretical restrictions, and use them to study the detection of LFV Higgs modes at LHC. We find several encouraging scenarios to the search for the decay $h\to \tau \mu$ that could be achieved in the High-Luminosity LHC. On the other hand, LFV Higgs couplings can also be induced at one-loop level in the 2HDM with neutrino masses, with the loops being mediated by neutrino interactions; we find that the resulting branching ratios are of order $10^{-7}$ at best, which is out of the reach of current and future phases of the LHC.

arXiv commentVersion accepted to be published in IJMPA

References in corpus (55)

• 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
• Theory and phenomenology of two-Higgs-doublet models
• MadGraph 5 : Going Beyond
• Parton distributions from high-precision collider data
• Oscillating neutrinos and mu --> e, gamma
• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm
• CalcHEP 3.4 for collider physics within and beyond the Standard Model
• Global analysis of three-flavour neutrino oscillations: synergies and tensions in the determination of theta_23, delta_CP, and the mass ordering
• MadAnalysis 5, a user-friendly framework for collider phenomenology
• Combined measurements of Higgs boson production and decay using up to $80$ fb${}^{-1}$ of proton-proton collision data at $\sqrt{s}=$ 13 TeV collected with the ATLAS experiment
• Combined measurements of Higgs boson couplings in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Next-to-Leading QCD Corrections to B -> X_s gamma: Standard Model and Two-Higgs Doublet Model
• A new bound on the electron's electric dipole moment
• Models of Yukawa interaction in the two Higgs doublet model, and their collider phenomenology
• Weak Radiative Decays of the B Meson and Bounds on $M_{H^{\pm }}$ in the Two-Higgs-Doublet Model
• Search for lepton-flavour-violating decays of the Higgs boson
• Virtual $O(\a_s)$ corrections to the inclusive decay $b\to s\gamma$
• Exact ${\alpha }_s$ Calculation of $b\to s+\gamma$, \ $b\to s+g$
• Probing lepton flavour violation with Higgs boson decays H-> li+lj
• Photon Energy Spectrum in $B\to X_s\gamma$ and Comparison with Data
• Lepton flavor violating Higgs boson decays from massive seesaw neutrinos
• Imprints of massive inverse seesaw model neutrinos in lepton flavor violating Higgs boson decays
• Search for lepton-flavour-violating decays of the Higgs and $Z$ bosons with the ATLAS detector
• Lepton Flavour Violating Decays of Supersymmetric Higgs Bosons
• Relating the scalar flavour-changing neutral couplings to the CKM matrix
• Leptonic CP Asymmetries in Flavor-changing H0 Decays
• Lepton flavor violation in Higgs boson decays under the rare tau decay results
• $h\to \mu \tau$ at Hadron Colliders
• A $L_{\mu }-L_{\tau }$ theory of Higgs flavor violation and $(g-2{)}_{\mu }$
• Mass matrix Ansatz and lepton flavor violation in the THDM-III
• Search for lepton-flavor violating decays of the Higgs boson in the $\mu \tau$ and e$\tau$ final states in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Searches for lepton-flavour-violating decays of the Higgs boson in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
• Analysis of the $h,H,A\to \tau \mu$ decays induced from SUSY loops within the Mass Insertion Approximation
• Measuring the fermionic couplings of the Higgs boson at future colliders as a probe of a non-minimal flavor structure
• Effective lepton flavor violating $\mathbf{H}{\mathbf{\ell }}_{\mathbf{i}}{\mathbf{\ell }}_{\mathbf{j}}$ vertex from right-handed neutrinos within the mass insertion approximation
• Lepton flavor violating decays of Standard-Model-like Higgs in 3-3-1 model with neutral lepton
• A More Flavored Higgs boson in Supersymmetric models
• Effective approach to lepton observables: the seesaw case
• Different kind of textures of Yukawa coupling matrices in the two Higgs doublet model type III
• Flavor Violating Higgs signals in the Texturized Two-Higgs Doublet Model (2HDM-Tx)
• Lepton Flavour Violating Heavy Higgs Decays Within the nuMSSM and Their Detection at the LHC
• Lepton flavor violating Higgs boson decays in seesaw models: new discussions
• Higgs lepton flavor violating decays in Two Higgs Doublet Models
• Flavor techniques for LFV processes: Higgs decays in a general seesaw model
• Collider Constraints on Lepton Flavor Violation in the 2HDM
• Texture of Yukawa coupling matrices in general two-Higgs-doublet model
• Probing Lepton Flavor Violating decays in MSSM with Non-Holomorphic Soft Terms
• The $\rho$ parameter and $H^0\to {\ell }_i{\ell }_j$ in models with TeV sterile neutrinos
• Searching for LFV Flavon decays at hadron colliders
• The Higgs Profile in the Standard Model and Beyond
• Searching for BSM Physics in Yukawa Couplings and Flavour Symmetries
• Hidden Signals of New Physics within the Yukawa Couplings of the Higgs boson
• Weak dipole moments of the tau lepton in models with an extended scalar sector
• The General One-loop Structure for the LFV Higgs Decays $H_r\to l_a{l}_b$ in multi-Higgs Models with Neutrino Masses