Explaining the CMS Higgs flavor violating decay excess

Abstract

Direct searches for lepton flavor violating Higgs boson decays in the $\tau \mu$ channel have been recently reported by the CMS collaboration. The results display a slight excess of signal events with a significance of 2.5$\sigma$, which translates into a branching ratio of about $1$%. By interpreting these findings as a hint for beyond the standard model physics, we show that the Type-III 2HDM is capable of reproducing such signal while at the same time satisfying vacuum stability, perturbativity, electroweak precision data, measured Higgs standard decay modes and low-energy lepton flavor violating constraints. We have found that the allowed signal strength ranges for the $b\bar{b}$, $W{W}^{\ast }$ and $Z{Z}^{\ast }$ standard channels shrink as soon as BR$(h\to \tau \mu )\sim 1$% is enforced. Thus, we point out that if the excess persists, improved measurements of these channels may be used to test our Type-III 2HDM scenario.

8 pages, 2 figures; v2: references added

References in corpus (33)

• 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
• Minimal Flavour Violation: an effective field theory approach
• Searches for Lepton Flavor Violation in the Decays tau -> e gamma and tau -> mu gamma
• 2HDMC - Two-Higgs-Doublet Model Calculator
• The Electroweak Fit of the Standard Model after the Discovery of a New Boson at the LHC
• Basis-independent methods for the two-Higgs-doublet model
• Flavor-phenomenology of two-Higgs-doublet models with generic Yukawa structure
• Phenomenology of Two Higgs Doublet Models with Flavor Changing Neutral Currents
• Flavor Violating Higgs Decays
• Tree-level unitarity constraints in the most general 2HDM
• Minkowski space structure of the Higgs potential in 2HDM
• Flavour-Changing Decays of a 125 GeV Higgs-like Particle
• Search for invisible decays of Higgs bosons in the vector boson fusion and associated ZH production modes
• Search for Invisible Decays of a Higgs Boson Produced in Association with a Z Boson in ATLAS
• Vector-like leptons: Higgs decays and collider phenomenology
• Minkowski space structure of the Higgs potential in 2HDM: II. Minima, symmetries, and topology
• Two--loop Contributions of Flavor Changing Neutral Higgs Boson to $\mu \to e\gamma$
• Probing lepton flavour violation with Higgs boson decays H-> li+lj
• A Twisted Custodial Symmetry in the Two-Higgs-Doublet Model
• Flavor changing interactions mediated by scalars at the weak scale
• Lepton flavor violation in the Higgs sector and the role of hadronic tau-lepton decays
• Lepton flavor violation in Higgs boson decays under the rare tau decay results
• Higgs-induced lepton flavor violation
• Lepton flavour violating Higgs and tau to mu gamma
• Bounds on scalar masses in two Higgs doublet models
• Towards a general analysis of LHC data within two-Higgs-doublet models
• Exotic Higgs boson decay modes as a harbinger of $S_3$ flavor symmetry
• Status of Higgs couplings after Run-1 of the LHC using Lilith 1.0
• Non-decoupling SUSY in LFV Higgs decays: a window to new physics at the LHC
• Higgs to mu tau Decay in Supersymmetry without R Parity
• Flavor and CP violation in Higgs decays
• Novel signatures of the Higgs sector from S3 flavor symmetry

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• Phenomenology of SU(5) low-energy realizations: the diphoton excess and Higgs flavor violation
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