Chiral perturbation theory for baryon-number-violating nucleon decay into a vector meson

Abstract

In a recent work [New chiral structures for baryon number violating nucleon decays, arXiv:2504.14855], we identified generic baryon-number-violating (BNV) structures containing triple light quarks and achieved their leading-order chiral realizations involving octet pseudoscalars and baryons. Although many two-body nucleon decays into a vector meson have been experimentally searched for and stringently constrained, a consistent theoretical framework for their calculation is still lacking. In this Letter, we fill the gap by implementing chiral matching of all these triple-quark interactions onto hadronic interactions involving octet vector mesons, baryons, and pseudoscalars. This paves the way for a consistent and comprehensive study of all relevant BNV processes. As an illustration of application, we show how degeneracy in the parameter space of Wilson coefficients can be broken by synthesizing experimental constraints on nucleon decays into a vector or pseudoscalar meson when relevant hadronic low-energy constants can be reasonably determined.

v2: minor revisions, 6 pages + supplemental material, matched the published version as a Letter in PRD

References in corpus (7)

• Search for Nucleon Decay into Charged Anti-lepton plus Meson in Super-Kamiokande I and II
• Search for nucleon decay into charged antilepton plus meson in 0.316 megaton$\cdot$years exposure of the Super-Kamiokande water Cherenkov detector
• An EFT approach to baryon number violation: lower limits on the new physics scale and correlations between nucleon decay modes
• Leading order mesonic and baryonic SU(3) low energy constants from $N_f=3$ lattice QCD
• Bosonic and fermionic Weinberg-Joos (j,0)+ (0,j) states of arbitrary spins as Lorentz-tensors or tensor-spinors and second order theory
• Baryon Number Violation: From Nuclear Matrix Elements to BSM Physics
• Baryon number violating hydrogen decay