Probing lepton number violation: a comprehensive survey of dimension-7 SMEFT

A bstract Observation of lepton number violation would represent a groundbreaking discovery with profound consequences for fundamental physics and as such, it has motivated an extensive experimental program searching for neutrinoless double beta decay. However, the violation of lepton number can be...

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Bibliographic Details
Published in:The journal of high energy physics 2024-05, Vol.2024 (5), p.154-51, Article 154
Main Authors: Fridell, Kåre, Gráf, Lukáš, Harz, Julia, Hati, Chandan
Format: Article
Language:English
Subjects:
Baryon/Lepton Number Violation
Beta decay
Classical and Quantum Gravitation
Elementary Particles
Energy
Experiments
Field theory
Flavor (particle physics)
Leptons
Neutrino Interactions
Neutrinos
Operators
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
SMEFT
Specific BSM Phenomenology
String Theory
Symmetry
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Summary:A bstract Observation of lepton number violation would represent a groundbreaking discovery with profound consequences for fundamental physics and as such, it has motivated an extensive experimental program searching for neutrinoless double beta decay. However, the violation of lepton number can be also tested by a variety of other observables. We focus on the possibilities of probing this fundamental symmetry within the framework of the Standard Model Effective Field Theory (SMEFT) beyond the minimal dimension-5. Specifically, we study the bounds on ∆ L = 2 dimension-7 effective operators beyond the electron flavor imposed by all relevant low-energy observables and confront them with derived high-energy collider limits. We also discuss how the synergy of the analyzed multi-frontier observables can play a crucial role in distinguishing among different dimension-7 SMEFT operators.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP05(2024)154