A model for the three lepton decay mode of the proton

Brahmachari, Biswajoy; O’Donnell, Patrick; Sarkar, Utpal

doi:10.1007/s002880050380

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…In this PS version, quartic terms of the form Σ 2 ∆ 2 R in the scalar potential lead to BNV decays which are distinct from the proton decay modes discussed above (such as p → e + π 0 ) that realize the ∆(B − L) = 0 selection rule. On the contrary, these BNV nucleon decay modes correspond to dimension-9 operators and obey a selection rule ∆(B − L) = −2 [53,[267][268][269][270][271][272][273][274][275]. There are two types of such decays: (i) a single lepton p, n → + mesons (such as p → e − π + π + , e − π + K + , µ − π + K + , νπ + etc.)…”

Section: Pati-salam Partial Unificationmentioning

confidence: 99%

Searches for Baryon Number Violation in Neutrino Experiments: A White Paper

Dev¹,

Koerner²,

Saad³

et al. 2022

Preprint

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Baryon number conservation is not guaranteed by any fundamental symmetry within the Standard Model, and therefore has been a subject of experimental and theoretical scrutiny for decades. So far, no evidence for baryon number violation has been observed. Large underground detectors have long been used for both neutrino detection and searches for baryon number violating processes. The next generation of large neutrino detectors will seek to improve upon the limits set by past and current experiments and will cover a range of lifetimes predicted by several Grand Unified Theories. In this White Paper, we summarize theoretical motivations and experimental aspects of searches for baryon number violation in neutrino experiments.

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Section: Pati-salam Partial Unificationmentioning

confidence: 99%

Searches for Baryon Number Violation in Neutrino Experiments: A White Paper

Dev¹,

Koerner²,

Saad³

et al. 2022

Preprint

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“…operators [74][75][76]. The Feynman diagrams corresponding to nucleon decay processes mediated by d = 10 operators are shown in Fig.…”

Section: Mass Spectrum Of ∆ R Scalar Fieldsmentioning

confidence: 99%

Fermion masses and mixings, Leptogenesis and Baryon number violation in Pati-Salam model

Saad

2019

Nuclear Physics B

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In this work we study a predictive model based on a partially unified theory possessing the gauge symmetry of the Pati-Salam group, SU (2) L × SU (2) R × SU (4) C supplemented by a global Peccei-Quinn symmetry, U (1) P Q . A comprehensive analysis of the Higgs potential is carried out in a minimal set-up. The assumed Peccei-Quinn symmetry along with solving the strong CP problem, can provide axion as the dark matter candidate. This minimal set-up with limited number of Yukawa parameters can successfully incorporate the hierarchies in the charged fermion masses and mixings. The automatic existence of the heavy Majorana neutrinos generate the extremely small light neutrino masses through the seesaw mechanism, which is also responsible for producing the observed cosmological matter-antimatter asymmetry of the universe. We find interesting correlation between the low scale neutrino observables and the baryon asymmetry in this model. Baryon number violating nucleon decay processes mediated by the scalar diquarks and leptoquarks in this framework are found to be, n, p → + m, c + m (m = meson, = lepton, c = antilepton) and n, p → + c + c . For some choice of the parameters of the theory, these decay rates can be within the observable range. Another baryon number violating process, the neutron-antineutron oscillation can also be in the observable range. *

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“…D in the scalar potential lead to BNV decays which are distinct from the proton decay modes discussed above (such as p → e + π 0 ) that realize the Δ(B − L) = 0 selection rule. On the contrary, these BNV nucleon decay modes correspond to dimension-9 operators and obey a selection rule Δ(B − L) = −2[53,[289][290][291][292][293][294][295][296][297]. There are two types of such decays: (i) a single lepton p, n → ℓ + mesons (such as p → e − π + π + , e − π + K + , μ − π + K + , νπ + etc) and (ii) three leptons p n ℓℓℓ , the final state as shown in figure4, where ℓand ℓ are lepton and antilepton, respectively.The difference between the left and the right Feynman diagrams in figure4is: the rightdiagram is obtained from the left-diagram by replacing the di-quark Σ 8 by a leptoquark Σ 3 .…”

mentioning

confidence: 99%