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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 explore scalar dark matter that is part of a lepton flavor triplet satisfying symmetry requirements under the hypothesis of minimal flavor violation. Beyond the standard model, the theory contains in addition three right-handed neutrinos…

High Energy Physics - Phenomenology · Physics 2015-05-06 Chao-Jung Lee , Jusak Tandean

We study the possible reach of the proposed International Linear Collider (ILC) in exploring the lepton flavor violating (LFV) Higgs boson decay $h\to\mu\tau$. Two generic types of models are investigated, both involving an extended scalar…

High Energy Physics - Phenomenology · Physics 2016-11-23 Indrani Chakraborty , Amitava Datta , Anirban Kundu

ATLAS and CMS have reported an excess in the flavor violating decay of the Higgs boson, $h \rightarrow \mu \tau$. We show that this result can be accommodated through a mixing of the Higgs with a flavon, the field responsible for generating…

High Energy Physics - Phenomenology · Physics 2016-04-27 Katri Huitu , Venus Keus , Niko Koivunen , Oleg Lebedev

We briefly review the lepton flavor violating Z-decays at GigaZ as a probe of supersymmetry by focusing on $Z \to \ell_i \overline{\ell}_j$ in two representative supersymmetric models: the minimal supersymmetric model without R-parity and…

High Energy Physics - Phenomenology · Physics 2011-08-19 Jin Min Yang

Run-I results from the CMS collaboration show an excess of events in the decay $h \to \mu \tau_e$ with a local significances of 2.4$\sigma$. This could be the first hint of flavour violation in the Higgs sector. We summarise the bounds on…

High Energy Physics - Phenomenology · Physics 2016-07-19 Shankha Banerjee , Biplob Bhattacherjee , Manimala Mitra , Michael Spannowsky

If neutrino mass and mixing consistent with the neutrino oscillation data are the only source of lepton flavor violation (LFV)in nature, the other LFV decays like the radiative and semileptonic decays would be too small to be observed…

High Energy Physics - Phenomenology · Physics 2007-05-23 Ashok Goyal

In this talk, I will present the status of lepton flavor physics in composite Higgs models with partial compositeness in the light of recent data in the lepton sector. I will consider anarchic flavor setups, scenarios with flavor…

High Energy Physics - Phenomenology · Physics 2021-12-03 Florian Goertz

We study the flavor-changing decay $h\to \tau \mu$ with $\tau=\tau^-+\tau^+$ and $\mu=\mu^-+\mu^+$ of a Higgs boson at future hadron colliders, namely: a) High Luminosity Large Hadron Collider, b) High Energy Large Hadron Collider and c)…

High Energy Physics - Phenomenology · Physics 2020-08-05 M. A. Arroyo-Ureña , T. A. Valencia-Pérez , R. Gaitán , J. H. Montes de Oca Y. , A. Fernández-Téllez

We study the radiative lepton flavor violating l_i -> l_j\gamma decays in the two Higgs doublet model, respecting the Randall Sundrum scenario and estimate the contributions of the KK modes of left (right) handed charged lepton doublets…

High Energy Physics - Phenomenology · Physics 2008-11-26 E. O. Iltan

The existence of charged Higgs boson(s) is inevitable in models with two (or more) Higgs doublets. Hence, their discovery would constitute unambiguous evidence for new physics beyond the Standard Model (SM). Taking into account all relevant…

High Energy Physics - Phenomenology · Physics 2018-03-13 A. Arbey , F. Mahmoudi , O. Stal , T. Stefaniak

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

High Energy Physics - Experiment · Physics 2020-02-04 ATLAS Collaboration

In this article we study the full one-loop SUSY contributions to the lepton flavor violating Higgs decay $h \to \tau \bar \mu $, within the context of the supersymmetric inverse sesaw model. We assume that both the right-handed neutrino…

High Energy Physics - Phenomenology · Physics 2016-03-23 E. Arganda , M. J. Herrero , X. Marcano , C. Weiland

New physics thresholds which can modify the diphoton and dilepton Higgs branching ratios significantly may also provide new sources of CP and lepton flavor violation. We find that limits on electric dipole moments impose strong constraints…

High Energy Physics - Phenomenology · Physics 2015-03-20 David McKeen , Maxim Pospelov , Adam Ritz

We discuss possibility of direct search for lepton flavor violation (LFV) in Yukawa interaction by measuring the branching ratio for the decay of the lightest Higgs boson ($h^0$) into a $\tau$-$\mu$ pair at a linear collider. We study the…

High Energy Physics - Phenomenology · Physics 2009-11-10 Shinya Kanemura , Kouichi Matsuda , Toshihiko Ota , Tetsuo Shindou , Eiichi Takasugi , Koji Tsumura

We study the impact of heavy vector-like leptons on several observables in collider and low-energy physics. These states, present in many well-motivated extensions of the Standard Model, can induce lepton flavour violation and non-standard…

High Energy Physics - Phenomenology · Physics 2015-06-18 Adam Falkowski , David M. Straub , Avelino Vicente

The ATLAS and CMS experiments at the LHC have reported the observation of a possible excess of events corresponding to a new particle $h$ with mass $\sim 125$ GeV that might be the long-sought Higgs boson, or something else. Decyphering the…

High Energy Physics - Phenomenology · Physics 2015-06-04 Gianluca Blankenburg , John Ellis , Gino Isidori

A new process with the lepton flavor violation (LFV) is presented in the setup for LHC. The LFV is induced by the one-loop effect through Higgs bosons in the framework of the type-III two Higgs doublet model. It is demonstrated that the…

High Energy Physics - Phenomenology · Physics 2021-12-14 K. Asai , J. Fujimoto , K. Kaneta , Y. Kurihara , S. Tsuno

Lepton flavor violating processes such as \mu \to 3e and \mu \to e \gamma are investigated with supersymmetric Higgs triplet pair \Delta and \bar \Delta in the light of neutrino masses and experimentally verifiable leptogenesis. The Higgs…

High Energy Physics - Phenomenology · Physics 2009-11-10 Masato Senami , Katsuji Yamamoto

Predictive Higgs-fermion couplings can be obtained when a specific texture for the fermion mass matrices is included in the general two-Higgs doublet model. We derive the form of these couplings in the charged lepton sector using a…

High Energy Physics - Phenomenology · Physics 2009-11-10 J. L. Diaz-Cruz , R. Noriega-Papaqui , A. Rosado