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In supersymmetric see-saw model, the large flavor mixings of sleptons induce the lepton flavor violating (LFV) interactions $\ell_I \bar\ell_J V$ ($V=\gamma, Z$), which give rise to various LFV processes. In this work we examine the induced…

高能物理 - 唯象学 · 物理学 2009-11-10 Junjie Cao , Zhaohua Xiong , Jin Min Yang

We investigate the lepton flavor violation decays, $\tau \to \mu\gamma$, $\tau \to e\gamma$ and $\mu \to e\gamma$, in the framwork of a squential fourth generation model with a heavy fourth neutrino, $\nu'$. Using the recent experimental…

高能物理 - 唯象学 · 物理学 2007-05-23 Wu-Jun Huo , Tai-Fu Feng

The search for lepton-flavor-violation process e^+e^-\to e\mu in the energy region \sqrt{s}=984 - 1060 MeV with SND detector at VEPP-2M e^+e^- collider is reported. The model independent 90% CL upper limits on the e^+e^-\to e\mu cross…

We present the first results from the MEG experiment for the search of the Lepton Flavour Violating decay $\mu^+ \to e^+ \gamma$ . LFV decays are forbidden in the SM and highly suppressed in any minimal SM extension with tiny neutrino…

高能物理 - 实验 · 物理学 2019-08-13 Elisabetta Baracchini

We assess the status of past and future experiments on lepton flavor violating (LFV) muon and tau decays into a light, invisible, axion-like particle (ALP), $a$. We propose a new experimental setup for MEG II, the MEGII-fwd, with a forward…

高能物理 - 唯象学 · 物理学 2022-04-18 Lorenzo Calibbi , Diego Redigolo , Robert Ziegler , Jure Zupan

The Minimal R-symmetric Supersymmetric Standard Model with Seesaw (MRSSMSeesaw) extends the MRSSM by incorporating right-handed neutrinos to generate neutrino masses via the Type-I seesaw mechanism. This work presents a detailed analysis of…

高能物理 - 唯象学 · 物理学 2026-01-06 Hao-Yi Liu , Jin-Lei Yang , Ke-Sheng Sun , Tai-Fu Feng

We examine the parameter space region of the inverse seesaw model that is consistent with neutrino oscillation data. We focus on the correlation between the current limits from the search of the $\mu\to e\gamma$ lepton flavor violating…

高能物理 - 唯象学 · 物理学 2023-08-28 J. C. Garnica , G. Hernández-Tomé , E. Peinado

Starting from the general effective hamiltonian relevant to the $b\to s$ transitions, we derive the expressions for the full angular distributions of the $B \to K^{(\ast )} \ell_1 \ell_2$ decay modes, as well as for ${\cal B}(B_s \to…

高能物理 - 唯象学 · 物理学 2016-09-12 Damir Becirevic , Olcyr Sumensari , Renata Zukanovich Funchal

We study lepton-flavor violating slepton production and decay at a future e^+e^- linear collider in context with the seesaw mechanism in mSUGRA post-LEP benchmark scenarios. The present knowledge in the neutrino sector as well as improved…

高能物理 - 唯象学 · 物理学 2008-11-26 F. Deppisch , H. Päs , A. Redelbach , R. Rückl , Y. Shimizu

We carry out an exhaustive analysis of lepton flavor violating processes within the Simplest Little Higgs model. Its discovery could be expected from either $\mu\to e$ conversion in nuclei, $\mu\to e\gamma$ or $\mu\to3e$ decays. Then, the…

高能物理 - 唯象学 · 物理学 2022-09-26 Enrique Ramirez , Pablo Roig

We consider theories where lepton flavor is violated, in particular concentrating on the four fermion operator consisting of three electrons and a tau. Strong constraints are available from existing searches for tau -> eee, requiring the…

高能物理 - 唯象学 · 物理学 2015-01-14 Brandon Murakami , Tim M. P. Tait

We develop a systematic procedure of constructing lepton mass matrices that satisfy all the experimental constraints in the light lepton sector of the minimal left-right symmetric model with type-I seesaw dominance. This method is unique…

高能物理 - 唯象学 · 物理学 2017-06-08 Chang-Hun Lee

A search for second and third generation scalar and vector leptoquarks produced in ep collisions via the lepton flavour violating processes ep -> mu X and ep -> tau X is performed by the H1 experiment at HERA. The full data sample taken at…

高能物理 - 实验 · 物理学 2015-05-27 H1 Collaboration

Neutrino masses provide evidence of lepton flavour violation, but no violation in the interactions among the charged leptons has been observed yet. Many models of Physics Beyond the Standard Model (BSM) predict Charged Lepton Flavour…

高能物理 - 唯象学 · 物理学 2023-09-15 Marco Ardu , Gianantonio Pezzullo

We investigate the lepton flavor violation (LFV) decays, $\tau\to l\gamma$ ($l=\mu, e$) and $\mu\to e\gamma$, and the newly observed muon $g-2$ anomaly in the framwork of a squential fourth generation model with a heavy fourth neutrino,…

高能物理 - 唯象学 · 物理学 2007-05-23 W. J. Huo , T. F. Feng

We consider supersymmetric (SUSY) models for the muon $g-2$ anomaly without flavor violating masses at the tree-level. The models can avoid LHC constraints and the vacuum stability constraint in the stau-Higgs potential. Although large…

高能物理 - 唯象学 · 物理学 2022-05-20 Ryo Nagai , Norimi Yokozaki

We use the BNL E821 measurement of g - 2, the anomalous magnetic moment of the muon, to normalize, within a supersymmetric GUT framework, constrained MSSM (CMSSM) predictions for processes that violate charged-lepton flavour conservation,…

高能物理 - 唯象学 · 物理学 2009-09-11 D. F. Carvalho , John Ellis , M. E. Gomez , S. Lola

Charged Lepton Flavor Violation (cLFV) processes like $ \mu \rightarrow e \gamma $ are rare decay processes, that are another signature of physics beyond Standard Model (BSM). These processes have been studied in various models, that could…

高能物理 - 唯象学 · 物理学 2015-12-03 Kalpana Bora , Gayatri Ghosh

We study the lepton flavor violating process, $e+ T \to \tau +T'$, at a few GeV. This process can be studied by experiments directing GeV scale electron or positron beams on internal or fixed targets. We study the effects of some low energy…

高能物理 - 唯象学 · 物理学 2016-02-03 Wei Liao , Xiao-Hong Wu

A search for second and third generation scalar and vector leptoquarks produced in ep collisions via the lepton flavour violating processes ep -> mu X and ep -> tau X is performed by the H1 experiment at HERA. The full H1 ep data sample…

高能物理 - 实验 · 物理学 2011-08-05 David M. South