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A Note on Proton Stability in the Standard Model

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arxiv 2204.01741 v2 pith:Y4VZCSPM submitted 2022-04-04 hep-ph hep-th

classification hep-phhep-th
keywords protonsymmetryglobalmodelnotestabilitystandardabsolute
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

In this short note we describe the symmetry responsible for absolute, nonperturbative proton stability in the Standard Model. The SM with $N_c$ colors and ${N_g}$ generations has an exact, anomaly-free, generation-independent, global symmetry group $U(1)_{B-N_c L} \times \mathbb{Z}_{N_g}^L$, which contains a subgroup of baryon plus lepton number of order $2 N_c {N_g}$. This disallows proton decay for ${N_g}>1$. Many well-studied models beyond the SM explicitly break this global symmetry, and the alternative deserves further attention.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Fermion Families and Pontryagin Class: Topological Field Theory via Colour Symmetry Extension

    hep-th 2026-05 unverdicted novelty 6.0 of 10

    From anomaly cancellation plus a stipulated minimality principle, the Standard Model is forced to N_c=N_f=3; the paper proves supporting theorems: H^d(Z_n,U(1)) cocycles split under the Z_n→Z_{n^2} extension, while A_...

  2. About electroweak domain walls in Majoron models

    hep-ph 2025-06 conditional novelty 5.0 of 10

    Electroweak instantons alone do not produce Majoron domain walls; a tiny instanton mass from B+L breaking is cosmologically negligible and can act as a bias or dark energy.

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