Lepton flavor violating Higgs Boson Decays in Supersymmetric High Scale Seesaw Models

Gómez, M. E.; Heinemeyer, S.; Rehman, M.

doi:10.48550/arxiv.1703.02229

Cited by 3 publications

(3 citation statements)

References 35 publications

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“…), leading to flavor violations at low energies [19,20]. This can substantially influence lepton flavor violating decays of the types (l j → l i γ)) or three-body lepton decays l j → 3l i through photon, Z or Higgs penguins and the flavor violating decays of the Higgs scalars (see e.g., [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38]). Other important probes are semileptonic τ -decays, µ − e conversion of nucleus etc.…”

Section: Lijmentioning

confidence: 99%

Probing Lepton Flavor Violating decays in MSSM with Non-Holomorphic Soft Terms

Chattopadhyay,

Das,

Mukherjee

2019

Preprint

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The Minimal Supersymmetric Standard Model (MSSM) can be extended to include non-holomorphic trilinear soft supersymmetry (SUSY) breaking interactions that may have distinct signatures. We consider non-vanishing off-diagonal entries of the coupling matrices associated with holomorphic (of MSSM) and non-holomorphic trilinear terms corresponding to sleptons with elements A l ij and A l ij . We first improve the MSSM charge breaking minima condition of the vacuum to include the off-diagonal entries A l ij (with i = j). We further extend this analysis for non-holomorphic trilinear interactions. No other sources of lepton flavor violation like that from charged slepton matrices are considered. We constrain the interaction terms via the experimental limits of processes like charged leptons decaying with lepton flavor violation (LFV) and Higgs boson decaying to charged leptons with LFV. Apart from the leptonic decays we compute all the three neutral LFV Higgs boson decays of MSSM. We find that an analysis with non-vanishing A eµ involving the first two generations of sleptons receives the dominant constraint from µ → eγ. On the other hand, A eτ or A µτ can be constrained from the CMS 13 TeV analysis giving limits to the respective Yukawa couplings via considering SM Higgs boson decaying into eτ or µτ final states. Contributions from A l ij is too little to have any significance compared to the large effect from A l ij .

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Section: Lijmentioning

confidence: 99%

Probing Lepton Flavor Violating decays in MSSM with Non-Holomorphic Soft Terms

Chattopadhyay,

Das,

Mukherjee

2019

Preprint

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“…Br(h → µe) < 6.1 × 10 −5 Then, there is an adjustment of according to the update in Ref. [11]. On the theoretical side, although LFV processes can generally receive tree and/or loop contributions, the LFV processes we study in this paper originate only from loop diagrams.…”

Section: Introductionmentioning

confidence: 98%

Large signal of h → µτ within the constraints of e _i → e _j γ decays in the 3-3-1 model with neutral leptons*

Dinh²,

Hoang³

2022

Chinese Phys. C

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In the framework of the 3-3-1 model with neutral leptons, we have investigated the lepton-flavor-violating sources based on the Higgs mass spectrum which has two neutral Higgses identitied with corresponding ones in the Two-Higgs-Doublet model (THDM). On the $13~\mathrm{TeV}$ scale of the LHC, we point out the parameter space regions where the experimental limits of $e_i \rightarrow e_j\gamma$ decays are satisfied. These regions depend heavily on the mixing of exotic leptons but are predicted to have large $h^0_1\rightarrow \mu \tau$ signals. We also show that $\mathrm{Br}(h^0_1\rightarrow \mu \tau)$ can reach a value of $10^{-4}$.Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

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“…Furthermore, the LHCb collaboration has also performed similar searches [6]. From the theoretical side, these observables have also been studied very actively, exploring their potential to probe BSM theories such as neutrino mass models [7][8][9][10][11][12][13][14][15], minimal flavor violation [16][17][18][19], supersymmetric models [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38], two Higgs doublet models [39][40][41][42][43], composite Higgs models [44], models with extra dimensions [45][46][47][48],…”

Section: Introductionmentioning

confidence: 99%

Flavor Techniques for LFV Processes: Higgs Decays in a General Seesaw Model

Marcano

Morales

2020

Front. Phys.

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Lepton flavor violating processes are optimal observables to test new physics, since they are forbidden in the Standard Model while they may be generated in new theories. The usual approach to these processes is to perform the computations in the physical basis; nevertheless this may lose track of the dependence on some of the fundamental parameters, in particular on those at the origin of the flavor violation. Consequently, in order to obtain analytical expressions directly in terms of these parameters, flavor techniques are often preferred. In this work, we focus on the mass insertion approximation technique, which works with the interaction states instead of the physical ones, and provides diagrammatic expansions of the observables. After reviewing the basics of this technique with two simple examples, we apply it to the lepton flavor violating Higgs decays in the framework of a general type-I seesaw model with an arbitrary number of right-handed neutrinos. We derive an effective vertex valid to compute these observables when the right-handed neutrino masses are above the electroweak scale and show that we recover previous results obtained for low scale seesaws. Finally, we apply current constraints on the model to conclude on maximum Higgs decay rates, which unfortunately are far from current experimental sensitivities.

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Lepton flavor violating Higgs Boson Decays in Supersymmetric High Scale Seesaw Models

Cited by 3 publications

References 35 publications

Probing Lepton Flavor Violating decays in MSSM with Non-Holomorphic Soft Terms

Probing Lepton Flavor Violating decays in MSSM with Non-Holomorphic Soft Terms

Large signal of h → µτ within the constraints of e _i → e _j γ decays in the 3-3-1 model with neutral leptons*

Flavor Techniques for LFV Processes: Higgs Decays in a General Seesaw Model

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Lepton flavor violating Higgs Boson Decays in Supersymmetric High Scale Seesaw Models

Cited by 3 publications

References 35 publications

Probing Lepton Flavor Violating decays in MSSM with Non-Holomorphic Soft Terms

Probing Lepton Flavor Violating decays in MSSM with Non-Holomorphic Soft Terms

Large signal of h → µτ within the constraints of e i → e j γ decays in the 3-3-1 model with neutral leptons*

Flavor Techniques for LFV Processes: Higgs Decays in a General Seesaw Model

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Large signal of h → µτ within the constraints of e _i → e _j γ decays in the 3-3-1 model with neutral leptons*