SuSeFLAV 1.2: Program for supersymmetric mass spectra with seesaw mechanism and rare lepton flavor violating decays

Unitarity of the [Formula: see text] lepton flavor mixing matrix [Formula: see text] is unavoidably violated in a seesaw mechanism if its new heavy degrees of freedom are slightly mixed with the active neutrino flavors. We propose to use the atomic transition process [Formula: see text] (for [Formula: see text], [Formula: see text]), where [Formula: see text] and [Formula: see text] stand, respectively for the excited and ground levels of an atomic system, to probe or constrain the unitarity-violating effects of [Formula: see text]. We find that the photon spectrum of this transition will be distorted by the effects of [Formula: see text] and [Formula: see text] as compared with the [Formula: see text] case. We locate certain frequencies in the photon spectrum to minimize the degeneracy of effects of the unitarity violation and uncertainties of the flavor mixing parameters themselves. The requirements of a nominal experimental setup to test the unitarity of [Formula: see text] are briefly discussed.

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Calculation of the Branching Ratio of the Process μ→ 3e in the Hung Model

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.490-495.315 ◽

2012 ◽

Vol 490-495 ◽

pp. 315-318

Author(s):

Jian Ping Bu ◽

Bei Jia

Keyword(s):

Neutrino Mass ◽

Neutrino Oscillations ◽

Branching Ratio ◽

Branching Ratios ◽

Electroweak Scale ◽

Seesaw Mechanism ◽

Lepton Flavor ◽

Flavor Structure

Rich phenomenology is generally expected if the heavy neutrinos responsible via the seesaw mechanism for the small neutrino mass observed in neutrino oscillations are not much heavier than the electroweak scale. A model with this feature built in has been suggested recently by Hung. We analyze the lepton flavor structure in gauge interactions and calculate the branching ratios for the decays due to the gauge interactions in this model.

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Effect of Sterile Neutrino on Low-Energy Processes in Minimal Extended Seesaw With Δ(96) Symmetry and TM1 Mixing

Frontiers in Physics ◽

10.3389/fphy.2021.703266 ◽

2021 ◽

Vol 9 ◽

Author(s):

Nayana Gautam ◽

R. Krishnan ◽

Mrinal Kumar Das

Keyword(s):

Sterile Neutrino ◽

New Physics ◽

Double Beta Decay ◽

Tau Leptons ◽

Lepton Flavor Violation ◽

Normal Ordering ◽

Seesaw Mechanism ◽

Lepton Flavor ◽

Mass Matrices ◽

Energy Processes

We study the effect of sterile neutrino on some low-scale processes in the framework of the minimal extended seesaw (MES). MES is the extension of the seesaw mechanism with the addition of sterile neutrino of intermediate mass. The MES model in this work is based on Δ(96) × C2 × C3 flavor symmetry. The structures of mass matrices in the framework lead to TM1 mixing with μ–τ symmetry. The model predicts the maximal value of the Dirac CP phase. We carry out our analysis to study the new physics contributions from the sterile neutrino to different charged lepton flavor violation (cLFV) processes involving muon and tau leptons as well as neutrinoless double beta decay (0νββ). The model predicts normal ordering (NO) of neutrino masses, and we perform the numerical analysis considering normal ordering (NO) only. We find that a heavy sterile neutrino can lead to cLFV processes that are within the reach of current and planned experiments. The sterile neutrino present in our model is consistent with the current limits on the effective neutrino mass set by 0νββ experiments.

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Lepton flavor violatingτdecays in the type-III seesaw mechanism

Physical Review D ◽

10.1103/physrevd.81.113003 ◽

2010 ◽

Vol 81 (11) ◽

Cited By ~ 3

Author(s):

Abdesslam Arhrib ◽

Rachid Benbrik ◽

Chuan-Hung Chen

Keyword(s):

Seesaw Mechanism ◽

Type Iii ◽

Lepton Flavor

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FLAVOR MIXING AND CP VIOLATION OF MASSIVE NEUTRINOS

International Journal of Modern Physics A ◽

10.1142/s0217751x04016969 ◽

2004 ◽

Vol 19 (01) ◽

pp. 1-79 ◽

Cited By ~ 138

Author(s):

ZHI-ZHONG XING

Keyword(s):

Cp Violation ◽

Phenomenological Study ◽

Double Beta Decay ◽

Seesaw Mechanism ◽

Lepton Flavor ◽

Long Baseline ◽

Mixing Parameters ◽

Mass Matrices ◽

Flavor Mixing ◽

Massive Neutrinos

We present an overview of recent progress in the phenomenological study of neutrino masses, lepton flavor mixing and CP violation. We concentrate on the model-independent properties of massive neutrinos, both in vacuum and in matter. Current experimental constraints on the neutrino mass spectrum and the lepton flavor mixing parameters are summarized. The Dirac- and Majorana-like phases of CP violation, which are associated respectively with the long-baseline neutrino oscillations and the neutrinoless double beta decay, are discussed in detail. The seesaw mechanism, the leptogenesis scenario and the strategies to construct lepton mass matrices are briefly described. The features of flavor mixing between one sterile neutrino and three active neutrinos are also explored.

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Supersymmetric type-III seesaw mechanism: Lepton flavor violating decays and dark matter

Physical Review D ◽

10.1103/physrevd.83.013003 ◽

2011 ◽

Vol 83 (1) ◽

Cited By ~ 19

Author(s):

J. N. Esteves ◽

J. C. Romao ◽

M. Hirsch ◽

F. Staub ◽

W. Porod

Keyword(s):

Dark Matter ◽

Seesaw Mechanism ◽

Type Iii ◽

Lepton Flavor

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Calculation of the Branching Ratio of the Process μ→eγ in a Model of Electroweak-Scale Right-Handed Neutrinos

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.490-495.152 ◽

2012 ◽

Vol 490-495 ◽

pp. 152-156

Author(s):

Jian Ping Bu ◽

Bei Jia

Keyword(s):

Neutrino Mass ◽

Rare Decays ◽

Neutrino Oscillations ◽

Branching Ratio ◽

Branching Ratios ◽

Electroweak Scale ◽

Seesaw Mechanism ◽

Lepton Flavor ◽

Flavor Structure

Rich phenomenology is generally expected if the heavy neutrinos responsible via the seesaw mechanism for the small neutrino mass observed in neutrino oscillations are not much heavier than the electroweak scale. A model with this feature built in has been suggested recently by Hung. We analyze the lepton flavor structure in gauge interactions and calculate the branching ratios for the rare decays due to the gauge interactions in this model.

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Supersymmetric U(1)Y′⊗ U(1)B−L extension of the Standard Model

International Journal of Modern Physics A ◽

10.1142/s0217751x17500932 ◽

2017 ◽

Vol 32 (16) ◽

pp. 1750093 ◽

Cited By ~ 2

Author(s):

J. C. Montero ◽

V. Pleitez ◽

B. L. Sánchez-Vega ◽

M. C. Rodriguez

Keyword(s):

Gauge Symmetry ◽

Mass Spectra ◽

Tree Level ◽

Neutrino Masses ◽

Type I ◽

Seesaw Mechanism ◽

Active Neutrino ◽

Supersymmetric Version ◽

Fermion Masses ◽

The Standard Model

We build a supersymmetric version with [Formula: see text] gauge symmetry, where [Formula: see text] is a new charge and [Formula: see text] and [Formula: see text] are the usual baryonic and leptonic numbers. The model has three right-handed neutrinos with identical [Formula: see text] charges, and can accommodate all fermion masses at the tree level. In particular, the type I seesaw mechanism is implemented for the generation of the active neutrino masses. We obtain the mass spectra of all sectors and for the scalar one we also give the flat directions allowed by the model.

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