Neutrinos in a left-right model with a horizontal symmetry

Kiers, Ken; Assis, Michael; Simons, David; Petrov, Alexey A.; Soni, Amarjit

doi:10.1103/physrevd.73.033009

Cited by 12 publications

(10 citation statements)

References 63 publications

(130 reference statements)

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“…Let us consider a model that contains a doubly charged Higgs boson [5,6,29]. Such states often appear in the context of left-right models [7,8]. A coupling of the doubly charged Higgs field Δ −− to the lepton fields can be written as…”

Section: Orthomuoniummentioning

confidence: 99%

“…Integrating out the Δ −− field, this Lagrangian leads to the following effective Hamiltonian [5,8]: W and represents the parametrically leading contribution to y. We shall compute this contribution below.…”

Section: Orthomuoniummentioning

confidence: 99%

“…Yet, experimental analyses constantly push the bounds on the CLFV transitions. It might be that in some models of NP, such as a model with the doubly charged Higgs particles [5][6][7][8], the effective ΔL ¼ 2 transitions could occur at a rate that is not far below the sensitivity of currently operating experiments. Alternatively, it might be that no term that changes the lepton flavor by two units is present in a BSM Lagrangian.…”

Section: Introductionmentioning

confidence: 99%

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Muonium-antimuonium oscillations in effective field theory

Conlin

Petrov

2020

Phys. Rev. D

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Flavor violating processes in the lepton sector have highly suppressed branching ratios in the standard model, mainly due to the tiny neutrino mass. This means that observing a lepton flavor violation (LFV) in the next round of experiments would constitute a clear indication of physics beyond the standard model (BSM). We revisit a discussion of one possible way to search for LFV, muonium-antimuonium oscillations. This process violates the muon lepton number by two units and could be sensitive to the types of BSM physics that are not probed by other types of LFV processes. Using techniques of effective field theory, we calculate the mass and width differences of the mass eigenstates of muonium. We argue that its invisible decays give the parametrically leading contribution to the lifetime difference and put constraints on the scales of new physics probed by effective operators in muonium oscillations.

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Section: Orthomuoniummentioning

confidence: 99%

Section: Orthomuoniummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Muonium-antimuonium oscillations in effective field theory

Conlin

Petrov

2020

Phys. Rev. D

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“…This possibility is almost as popular in the literature (see, e.g., [36,24]) as the one we adopted before, even though it does not allow an SO(10) embedding of the minimal LR model. Eqs.…”

Section: Alternative Realization Of the Discrete Left-right Symmetrymentioning

confidence: 92%

“…(5.3), in the non-SUSY case, the structure of y can be different from y e . For a recent realistic model, see [24].…”

Section: Jhep01(2007)043mentioning

confidence: 99%

Interplay of type I and type II seesaw contributions to neutrino mass

Akhmedov

Frigerio

2007

J. High Energy Phys.

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Type I and type II seesaw contributions to the mass matrix of light neutrinos are inherently related if left-right symmetry is realized at high energy scales. We investigate implications of such a relation for the interpretation of neutrino data. We proved recently that the left-right symmetric seesaw equation has eight solutions, related by a duality property, for the mass matrix of right-handed neutrinos M R . In this paper the eight allowed structures of M R are reconstructed analytically and analyzed numerically in a bottom-up approach. We study the dependence of right-handed neutrino masses on the mass spectrum of light neutrinos, mixing angle θ 13 , leptonic CP violation, scale of left-right symmetry breaking and on the hierarchy in neutrino Yukawa couplings. The structure of the seesaw formula in several specific SO(10) models is explored in the light of the duality. The outcome of leptogenesis may depend crucially on the choice among the allowed structures of M R and on the level crossing between right-handed neutrino masses.

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