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We study lepton flavor violation (LFV) associated with tau leptons in the framework of the two Higgs doublet model, in which LFV couplings are introduced as a deviation from Model II Yukawa interaction. Parameters of the model are…

High Energy Physics - Phenomenology · Physics 2011-08-17 Shinya Kanemura , Toshihiko Ota , Koji Tsumura

Realistic predictions are made for the rates of lepton flavour violating Higgs boson decays, tau --> mu gamma, mu --> e gamma, Bs --> mu+mu-, Bs --> tau mu and tau --> 3mu, via a top-down analysis of the Minimal Supersymmetric Standard…

High Energy Physics - Phenomenology · Physics 2011-03-23 J. K. Parry

The N-B-LSSM is an extension of the minimal supersymmetric standard model (MSSM) with the addition of three singlet new Higgs superfields and right-handed neutrinos, whose local gauge group is $SU(3)_C\times SU(2)_L\times U(1)_Y\times…

High Energy Physics - Phenomenology · Physics 2025-09-23 Rong-Zhi Sun , Shu-Min Zhao , Ming-Yue Liu , Xing-Yu Han , Song Gao , Xing-Xing Dong

This paper presents direct searches for lepton flavour violation in Higgs boson decays, $H\rightarrow e\tau$ and $H\rightarrow\mu\tau$, performed using data collected with the ATLAS detector at the LHC. The searches are based on a data…

High Energy Physics - Experiment · Physics 2023-08-24 ATLAS Collaboration

Within the framework of the next to the minimal supersymmetric (SUSY) extension of the Standard Model (SM) with a local B-L gauge symmetry (N-B-LSSM), we study lepton flavor violating (LFV) $\tau\rightarrow e M^+ M^-$ decays: $\tau…

High Energy Physics - Phenomenology · Physics 2025-09-09 Rong-Zhi Sun , Shu-Min Zhao , Shuang Di , Xing-Xing Dong

The Standard Model predicts that the Higgs boson couples to the fermions in the mass eigenstates. We consider the effects of lepton flavor violating (LFV) $Z$ boson couplings in the case where the Higgs boson has flavor non-diagonal Yukawa…

High Energy Physics - Phenomenology · Physics 2015-10-21 Toru Goto , Ryuichiro Kitano , Shingo Mori

We consider the tentative indication of flavor-violating Higgs boson decay $h\to\mu\tau$ recently reported in the CMS experiment within the framework of minimal flavor violation. Specifically, we adopt the standard model extended with the…

High Energy Physics - Phenomenology · Physics 2015-09-22 Xiao-Gang He , Jusak Tandean , Ya-Juan Zheng

A search is presented for lepton-flavor violating decays of the Higgs boson to $\mu\tau$ and e$\tau$. The data set corresponds to an integrated luminosity of 137 fb$^{-1}$ collected at the LHC in proton-proton collisions at a center-of-mass…

High Energy Physics - Experiment · Physics 2021-09-08 CMS Collaboration

The lepton flavour violating (LFV) $\tau$ decays $\tau\to (e,\mu)\gamma$ and $\tau\to 3\mu$ are investigated in the frameworks of the TeV scale type I see-saw and Higgs Triplet (or type II see-saw) models. Predictions for the rates of these…

High Energy Physics - Phenomenology · Physics 2015-06-16 D. N. Dinh , S. T. Petcov

Taking into account the constraints on the lepton flavor violation (LFV) couplings of the Standard Model (SM) Higgs boson H with leptons from low energy experiments and the recent Compact Muon Solenoid experiment results, we investigate…

High Energy Physics - Phenomenology · Physics 2015-06-09 Chong-Xing Yue , Cong Pang , Yu-Chen Guo

Singly and doubly charged Higgs bosons in the Higgs Triplet Model mediate the lepton flavour violating (LFV) decays tau to \bar{l}ll and mu to e gamma. The LFV decay rates are proportional to products of two triplet Yukawa couplings…

High Energy Physics - Phenomenology · Physics 2009-07-09 A. G. Akeroyd , Mayumi Aoki , Hiroaki Sugiyama

We discuss the exclusive lepton flavor violating (LFV) decays modes based on $b\to d\ell_i\ell_j$ and $b\to s\ell_i\ell_j$ by considering the ground state mesons and baryons. After spelling out the expressions for such decay rates in a low…

High Energy Physics - Phenomenology · Physics 2024-07-30 Damir Bečirević , Florentin Jaffredo , João Paulo Pinheiro , Olcyr Sumensari

We study lepton flavor violating Higgs decays in two models, with the recently found hint for Higgs $\to \mu \tau$ at CMS as a benchmark value for the branching ratio. The first model uses the discrete flavor symmetry group $A_4$, broken at…

High Energy Physics - Phenomenology · Physics 2015-05-18 Julian Heeck , Martin Holthausen , Werner Rodejohann , Yusuke Shimizu

We consider an effective nondiagonal coupling $H\bar{\mu}\tau$ and present the analysis of the Higgs boson mediated lepton-flavor violating (LFV) reaction $\mu^-\mu^+ --> \mu \tau$. For a Higgs boson mass around 115 GeV and convenient…

High Energy Physics - Phenomenology · Physics 2007-05-23 U. Cotti , M. Pineda , G. Tavares-Velasco

The lepton flavor violating (LFV) decays $h, Z\to e_b e_a $, and $e_b\to e_a \gamma$ are discussed in a class of general 3-3-1 models adding heavy neutral leptons and singly charged Higgs bosons to accommodate experimental data of neutrino…

High Energy Physics - Phenomenology · Physics 2024-10-03 T. T. Hong , L. T. T. Phuong , T. Phong Nguyen , N. H. T. Nha , L. T. Hue

A search for lepton flavour violating decays of the Higgs boson in the $\mu\tau$ and e$\tau$ decay modes is presented. The search is based on a data set corresponding to an integrated luminosity of 35.9 fb$^{-1}$ of proton-proton collisions…

High Energy Physics - Experiment · Physics 2018-06-06 CMS Collaboration

Inspired by the recent measurement of the $h \to \mu \tau$ decays by the CMS collaboration at the LHC, we study the lepton flavour-violating (LFV) $B_s \to \mu \tau$ decays in the general two Higgs doublet model. Those LFV interactions…

High Energy Physics - Phenomenology · Physics 2017-04-11 Jong-Phil Lee , Kang Young Lee

We study lepton flavor violating (LFV) $B$ decays in a general two Higgs doublet model with sub-TeV exotic scalars. Two different parameter spaces are explored: one dominated by extra top Yukawa coupling $\rho_{tt}$, the other by LFV…

High Energy Physics - Phenomenology · Physics 2023-05-24 Wei-Shu Hou , Girish Kumar , Sven Teunissen

We introduce a new method to search for the lepton-flavor violating Higgs decays $h\rightarrow\tau\mu$ and $h\rightarrow\tau e$ in the leptonic $\tau$ decay channel. In particular, the Standard Model background is estimated in a fully data…

High Energy Physics - Phenomenology · Physics 2014-07-30 Shikma Bressler , Avital Dery , Aielet Efrati

General expressions for one-loop contributions associated with lepton-flavor violating decays of the standard model-like Higgs boson $h\to e_b^\pm e_a^\mp$ and gauge boson $Z\to e^\pm_b e_a^\mp$ are introduced in the unitary gauge. The…

High Energy Physics - Phenomenology · Physics 2024-12-17 L. T. Hue , Khiem Hong Phan , T. T. Hong , T. Phong Nguyen , N. H. T. Nha