scholarly journals Minimal models of loop-induced lepton flavor violation in Higgs boson decays

2016 ◽  
Vol 94 (7) ◽  
Author(s):  
Carlos Alvarado ◽  
Rodolfo M. Capdevilla ◽  
Antonio Delgado ◽  
Adam Martin
Keyword(s):  
Higgs Boson ◽  
Lepton Flavor Violation ◽  
Minimal Models ◽  
Lepton Flavor ◽  
Flavor Violation

scholarly journals Search for lepton flavor violation in the Higgs boson decay at a linear collider

2004 ◽  
Vol 599 (1-2) ◽  
pp. 83-91 ◽  
Author(s):  
Shinya Kanemura ◽  
Koichi Matsuda ◽  
Toshihiko Ota ◽  
Tetsuo Shindou ◽  
Eiichi Takasugi ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Linear Collider ◽  
Lepton Flavor Violation ◽  
Lepton Flavor ◽  
Flavor Violation

scholarly journals Lepton Flavor Violation in Economical 3-3-1 Model with Neutrino Singlets

2019 ◽  
Vol 29 (1) ◽  
pp. 87
Author(s):  
Le Tho Hue ◽  
Dinh Phan Khoi ◽  
Hoang Hanh Phuong ◽  
Ha Thanh Hung
Keyword(s):  
Higgs Boson ◽  
Decay Rates ◽  
Higgs Bosons ◽  
Boson Mass ◽  
Lepton Flavor Violation ◽  
Lepton Flavor ◽  
Flavor Violation ◽  
Charged Higgs ◽  
Charged Leptons ◽  
O 10

Lepton flavor violating (LFV) decays of charged leptons \(\mu\rightarrow e\gamma\)  and SM-like Higgs boson \(h\rightarrow \mu\tau\) are discussed in the framework of the  economical 3-3-1 model  adding three additional singlets neutrinos (E331\(X_R\)). We will show that the appearance of new neutrinos and charged Higgs bosons in this model can result in interesting regions of the parameter space, which satisfy  the recent experimental bound of \(Br(\mu\rightarrow e\gamma)\)  as well as give large \(Br(h\rightarrow \mu\tau)\geq \mathcal{O}(10^{-7})\) . In these regions,  the charged Higgs boson mass lies within the range of \(2-3\) TeV. Our results show that the LFV decays are important channels to distinguish the E331\(X_R\)  and the original economical (E331) models, which predicts suppressed LFV decay rates.

scholarly journals Minimal 3-loop neutrino mass models and charged lepton flavor violation

2020 ◽  
Vol 2020 (8) ◽  
Author(s):  
Ricardo Cepedello ◽  
Martin Hirsch ◽  
Paulina Rocha-Morán ◽  
Avelino Vicente
Keyword(s):  
Neutrino Mass ◽  
Charged Lepton ◽  
Mass Matrix ◽  
Majorana Neutrino ◽  
Lepton Flavor Violation ◽  
Minimal Models ◽  
Yukawa Couplings ◽  
Lepton Flavor ◽  
Flavor Violation ◽  
Neutrino Mass Models

Abstract We study charged lepton flavor violation for the three most popular 3-loop Majorana neutrino mass models. We call these models “minimal” since their particle content correspond to the minimal sets for which genuine 3-loop models can be constructed. In all the three minimal models the neutrino mass matrix is proportional to some powers of Standard Model lepton masses, providing additional suppression factors on top of the expected loop suppression. To correctly explain neutrino masses, therefore large Yukawa couplings are needed in these models. We calculate charged lepton flavor violating observables and find that the three minimal models survive the current constraints only in very narrow regions of their parameter spaces.

scholarly journals Higgs boson decays with lepton flavor violation in the B−L symmetric SSM

2021 ◽  
Vol 103 (11) ◽  
Author(s):  
Ze-Ning Zhang ◽  
Hai-Bin Zhang ◽  
Jin-Lei Yang ◽  
Shu-Min Zhao ◽  
Tai-Fu Feng
Keyword(s):  
Higgs Boson ◽  
Lepton Flavor Violation ◽  
Lepton Flavor ◽  
Flavor Violation

scholarly journals Charged lepton flavor violation at the EIC

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Vincenzo Cirigliano ◽  
Kaori Fuyuto ◽  
Christopher Lee ◽  
Emanuele Mereghetti ◽  
Bin Yan
Keyword(s):  
Cross Sections ◽  
Charged Lepton ◽  
Hadron Collider ◽  
Effective Field ◽  
Background Suppression ◽  
Lepton Flavor Violation ◽  
Final State ◽  
Lepton Flavor ◽  
Flavor Violation ◽  
Discovery Potential

Abstract We present a comprehensive analysis of the potential sensitivity of the Electron-Ion Collider (EIC) to charged lepton flavor violation (CLFV) in the channel ep→τX, within the model-independent framework of the Standard Model Effective Field Theory (SMEFT). We compute the relevant cross sections to leading order in QCD and electroweak corrections and perform simulations of signal and SM background events in various τ decay channels, suggesting simple cuts to enhance the associated estimated efficiencies. To assess the discovery potential of the EIC in τ-e transitions, we study the sensitivity of other probes of this physics across a broad range of energy scales, from pp→eτX at the Large Hadron Collider to decays of B mesons and τ leptons, such as τ→eγ, τ→eℓ+ℓ−, and crucially the hadronic modes τ→eY with Y∈π, K, ππ, Kπ, …. We find that electroweak dipole and four-fermion semi-leptonic operators involving light quarks are already strongly constrained by τ decays, while operators involving the c and b quarks present more promising discovery potential for the EIC. An analysis of three models of leptoquarks confirms the expectations based on the SMEFT results. We also identify future directions needed to maximize the reach of the EIC in CLFV searches: these include an optimization of the τ tagger in hadronic channels, an exploration of background suppression through tagging b and c jets in the final state, and a global fit by turning on all SMEFT couplings, which will likely reveal new discovery windows for the EIC.

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