Neutrino mass and lepton flavor violation in A4-based left–right symmetric model with linear seesaw

Sahu, Purushottam; Patra, Sudhanwa; Pritimita, Prativa

doi:10.1142/s0217751x22500300

Cited by 3 publications

(2 citation statements)

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“…The seesaw scale can be brought down to the TeV range in the case of a linear seesaw and inverse seesaw, some of which are discussed in ref. [54,[65][66][67][68][69][70][71][72][73]. However in case of a linear seesaw and inverse seesaw the light neutrinos are Majorana.…”

Section: Introductionmentioning

confidence: 99%

Neutrinoless double beta decay in Left-Right symmetric model with double seesaw

Patra¹,

Petcov²,

Pritimita³

et al. 2023

Preprint

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We discuss a left-right (L-R) symmetric model with the double seesaw mechanism at the TeV scale generating Majorana masses for the active left-handed (LH) flavour neutrinos ν αL and the heavy right-handed (RH) neutrinos N βR , α, β = e, µ, τ , which in turn mediate lepton number violating processes, including neutrinoless double beta decay. The Higgs sector is composed of two Higgs doublets H L , H R and a bi-doublet Φ. The fermion sector has the usual for the L-R symmetric models quarks and leptons, along with three SU (2) singlet fermion S γL . The choice of bare Majorana mass term for these sterile fermions induces large Majorana masses for the heavy RH neutrinos leading to two sets of heavy Majorana particles N j and S k , j, k = 1, 2, 3, with masses m N j m S k . Working with a specific version of the model in which the ν αL − N βR and the N βR − S γL Dirac mass terms are diagonal, and assuming that m N j ∼ (1 − 1000) GeV and max(m S k ) ∼ (1 − 10) TeV, m N j m S k , we study in detail the new "non-standard" contributions to the 0νββ decay amplitude and half-life arising due to the exchange of virtual N j and S k . We find that in both cases of NO and IO light neutrino mass spectra, these contributions are strongly enhanced and are dominant at relatively small values of the lightest neutrino mass m 1(3) ∼ (10 −4 − 10 −2 ) eV over the light Majorana neutrino exchange contribution. In large part of the parameter space, the predictions of the model for the 0νββ decay generalised effective Majorana mass and half-life are within the sensitivity range of the planned next generation of neutrinoless double beta decay experiments LEGEND-200 (LEGEND-1000), nEXO, KamlAND-Zen-II, CUPID, NEXT-HD.

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Section: Introductionmentioning

confidence: 99%

Neutrinoless double beta decay in Left-Right symmetric model with double seesaw

Patra¹,

Petcov²,

Pritimita³

et al. 2023

Preprint

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“…A natural type-II seesaw dominance allows large light-heavy neutrino mixing leading to many new physics contributions to neutrinoless double beta decay (NDBD) along with constraints on light neutrino mass. In one of the recent work [34] extended LRSM is studied in details considering linear seesaw to show the phenomenological importance of different LFV processes and unitarity violation using flavor symmetry.…”

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confidence: 99%

Neutrinoless double beta decay and sterile neutrino dark matter in extended left right symmetric model

Boruah

Gautam

Das

2024

J. Phys. G: Nucl. Part. Phys.

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We have studied a flavor symmetry-based extended left-right symmetric model(LRSM) with a dominant type-II seesaw mechanism and have explored the associated neutrino phenomenology. The particle content of the model includes usual quarks and leptons along with additional sterile fermion per generation in the fermion sector while the scalar content contains Higgs doublets and scalar bidoublet. This extension of LRSM has been realized by using $A_{4}\times Z_{4}$ discrete symmetries. In this work, we have included the study of sterile neutrino dark matter(DM) phenomenology and neutrinoless double beta decay within the framework.

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