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Recently, the ATLAS and CMS Collaborations reported the latest experimental upper limits on the branching ratios of the lepton flavor violating (LFV) 125 GeV Higgs boson decays, $h\rightarrow e\mu$, $h\rightarrow e\tau$, and $h\rightarrow…

High Energy Physics - Phenomenology · Physics 2021-06-16 Ze-Ning Zhang , Hai-Bin Zhang , Jin-Lei Yang , Shu-Min Zhao , Tai-Fu Feng

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

In the framework of the flipped 3-3-1 model introduced recently [1], the lepton-flavor-violating (LFV) decay $\mu \rightarrow 3e$ was predicted to have a large branching ratio (Br) close to the recent experimental limit. We will show that…

High Energy Physics - Phenomenology · Physics 2020-05-06 T. T. Hong , H. T. Hung , H. H. Phuong , L. T. T. Phuong , L. T. Hue

We investigate Lepton-Flavor Violating (LFV) decays of Higgs to muon-tau in the supersymmetric economical 3-3-1 (SUSYE331) model. In the presence of flavor mixing in sleptons {mu,tau} and large values of v/v', the ratio of Br(H…

High Energy Physics - Phenomenology · Physics 2012-07-11 P. T. Giang , L. T. Hue , D. T. Huong , H. N. Long

We perform a detailed analysis of several mu-tau lepton flavour violating (LFV) processes, namely tau --> mu X (X = gamma, e+ e-, mu+ mu-, rho, pi, eta, eta'), Z --> mu tau and Higgs boson decays into mu tau. First we present a model…

High Energy Physics - Phenomenology · Physics 2010-04-06 Andrea Brignole , Anna Rossi

$U(1)_X$SSM is the extension of the minimal supersymmetric standard model (MSSM) and its local gauge group is $SU(3)_C\times SU(2)_L \times U(1)_Y \times U(1)_X$. We study lepton flavor violating (LFV) decays…

High Energy Physics - Phenomenology · Physics 2022-10-12 Yi-Tong Wang , Shu-Min Zhao , Tong-Tong Wang , Xi Wang , Xin-Xin Long , Jiao Ma , Tai-Fu Feng

The lepton flavor violating decay of the Higgs boson $H\to l_Al_B$ is studied within two qualitatively different extensions of the Yukawa sector: one renormalizable and the other nonrenormalizable; both incorporating Lorentz violation in a…

High Energy Physics - Phenomenology · Physics 2016-02-15 M. A. López-Osorio , E. Martínez-Pascual , J. J. Toscano

We compute the lepton flavour violating couplings of Higgs bosons in the Minimal Supersymmetric Standard Model, and show that they can induce the decays (h,H,A) --> mu tau at non-negligible rates, for large tan(beta) and sizeable smuon-stau…

High Energy Physics - Phenomenology · Physics 2008-11-26 Andrea Brignole , Anna Rossi

We study a class of nonstandard interactions of the newly discovered 125 GeV Higgs-like resonance that are especially interesting probes of new physics: flavor violating Higgs couplings to leptons and quarks. These interaction can arise in…

High Energy Physics - Phenomenology · Physics 2015-08-17 Roni Harnik , Joachim Kopp , Jure Zupan

We discuss lepton flavor violation (LFV) associated with tau leptons in the framework of the two-Higgs-doublet model. Current data for rare tau decays provide substantial upper limits on the LFV Yukawa couplings in the large $\tan\beta$…

High Energy Physics - Phenomenology · Physics 2007-05-23 Koji Tsumura

Lepton flavor violation (LFV) represents a clear new physics (NP) signal beyond the standard model (SM). NB-LSSM, the next to minimal supersymmetric extension of the SM with local B-L gauge symmetry, includes three Higgs singlets and three…

High Energy Physics - Phenomenology · Physics 2025-10-08 Cai Guo , Xing-Xing Dong , Shu-Min Zhao , Zhan Cao , Jia-Peng Huo , Jin-Lei Yang , Tai-Fu Feng

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

We study lepton violating Higgs (HLFV) decays, first from the effective field theory (EFT) point of view, and then analysing the different high-energy realizations of the operators of the EFT, highlighting the most promising models. We…

High Energy Physics - Phenomenology · Physics 2016-12-21 Juan Herrero-Garcia , Nuria Rius , Arcadi Santamaria

We study the sensitivity of the LHC, with 20 inverse-fb of data, to lepton flavour violating Higgs boson decays h -> tau+ mu- (and h -> tau+ e-). We consider the large population of Higgses produced in gluon fusion, combined with leptonic…

High Energy Physics - Phenomenology · Physics 2013-05-30 Sacha Davidson , Patrice Verdier

Direct searches for lepton flavour violation in decays of the Higgs and $Z$ bosons with the ATLAS detector at the LHC are presented. The following three decays are considered: $H\to e\tau$, $H\to\mu\tau$, and $Z\to\mu\tau$. The searches are…

High Energy Physics - Experiment · Physics 2017-03-08 ATLAS Collaboration

A recent search for the lepton flavor violating (LFV) decays of the Higgs boson, performed by CMS collaboration, reports an interesting deviation from the standard model (SM). The search conducted in the channel $H\rightarrow \mu\tau_e$ and…

High Energy Physics - Phenomenology · Physics 2016-10-12 Biplob Bhattacherjee , Sabyasachi Chakraborty , Swagata Mukherjee

We investigate an extended 3-4-1 model consisting of a new singly charged Higgs boson, implementing the minimal inverse seesaw mechanism to accommodate the large values of the $(g-2)_{e,\mu}$ anomalies as well as the lepton-flavor-violating…

High Energy Physics - Phenomenology · Physics 2026-04-10 N. H. T. Nha , L. T. Hue , L. T. T. Phuong , T. T. Hong

In the two Higgs doublet model type III and in several other extensions of the Standard Model, there are no discrete symmetries that suppress flavor changing couplings at tree level. The experimental observation of the nu_mu -- nu_tau…

High Energy Physics - Phenomenology · Physics 2009-11-07 Ketevi A. Assamagan , Aldo Deandrea , Pierre-Antoine Delsart

A direct search for lepton flavour violating decays of the Higgs boson (H) in the H to e tau and H to e mu channels is described. The data sample used in the search was collected in proton-proton collisions at sqrt(s) = 8 TeV with the CMS…

High Energy Physics - Experiment · Physics 2016-12-13 CMS Collaboration

We study the lepton flavor violating H^0 \to h^0 (A^0) l_i^- l_j^+ and the lepton flavor conserving H^0 \to h^0 (A^0) l_i^- l_i^+ (l_i=\tau, l_j=\mu) decays in the framework of the general two Higgs doublet model, the so-called model III.…

High Energy Physics - Phenomenology · Physics 2009-11-07 E. Iltan
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