Neutrinoless double beta decay via light neutralinos in R-parity violating supersymmetry

• Published in: The journal of high energy physics 2022-03, Vol.2022 (3), p.152-33, Article 152
• Main Authors: Bolton, Patrick D., Deppisch, Frank F., Dev, P. S. Bhupal
• Format: Article
• Language: English
• Subjects: Astronomical models; Baryon/Lepton Number Violation; Beta decay; Big bang cosmology; Classical and Quantum Gravitation; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Conventions; Cosmology; Elementary Particles; Fermions; High energy physics; Interpolation; Non-Standard Neutrino Properties; Nuclear fusion; Nuclei (nuclear physics); Parity; Physics; Physics and Astronomy; Pions; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quarks; Regular Article - Theoretical Physics; Relativity Theory; String Theory; Supersymmetry
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP03(2022)152

A bstract We perform a study of neutrinoless double beta (0 νββ ) decay mediated by the lightest neutralino of arbitrary mass in the minimal supersymmetric Standard Model (MSSM) under the presence of R-parity violating trilinear interactions. In this scenario, the exchange of the lightest neutralino can result in 0 νββ decay of either long-range or short-range behaviour, depending on the neutralino mass. Using nuclear matrix elements calculated in the interacting boson model, we use an interpolation between the long- and short-range behaviours with an approximate formula. The non-observation of 0 νββ decay is then used to place constraints on the supersymmetry parameter space, compatible with constraints from collider experiments. We compare these constraints to bounds from pion decays, CKM unitarity and big bang nucleosynthesis.