Model-independent estimates for loop-induced baryon-number-violating nucleon decays

A bstract Baryon number is an accidental symmetry of the Standard Model (SM) Lagrangian that so far has been measured to be exactly preserved, although it is expected to be violated at higher energies. In this work we compute order-of-magnitude estimates for the matching contributions of generic ult...

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Bibliographic Details
Published in:The journal of high energy physics 2024-06, Vol.2024 (6), p.182-52, Article 182
Main Authors: Gargalionis, John, Herrero-García, Juan, Schmidt, Michael A.
Format: Article
Language:English
Subjects:
Asymmetry
Automation
Baryon/Lepton Number Violation
Baryons
Classical and Quantum Gravitation
Decay
Elementary Particles
Estimates
Leptons
Lower bounds
Neutrinos
Nucleons
Operators
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
SMEFT
String Theory
Symmetry
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Summary:A bstract Baryon number is an accidental symmetry of the Standard Model (SM) Lagrangian that so far has been measured to be exactly preserved, although it is expected to be violated at higher energies. In this work we compute order-of-magnitude estimates for the matching contributions of generic ultraviolet models to effective operators that generate nucleon decay processes. This is done in a systematic and automated way using operators constructed from SM fields up to dimension nine and working in a framework that has proved useful in the study of lepton-number violation. For each of the operators we derive estimates for the rates of different nucleon-decay channels. These allow us to establish model-independent lower bounds on the underlying new-physics scale and identify potential correlations between the various decay modes. The results are most relevant for families of models that generate the considered operator. This analysis is especially timely given the expected future sensitivities in numerous experiments such as Hyper-K, DUNE, JUNO and THEIA.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP06(2024)182