Year: 2026
Type: article
Abstract: A bstract The observed baryon asymmetry (BAU) of the universe puts strong constraints on any ( B − L )-violating interaction. An observation of a ( B − L )-violating nucleon decay channel would therefore have profound implications for our understanding of the BAU. Here we point out that the observation of the final state with a kaon and a charged lepton in a future nucleon decay experiment would hint at ( B − L ) violation even if the charge of the lepton is not determined experimentally. In SMEFT, this follows from the fact that n → K + ℓ − arises already at dimension seven, while the ( B − L )-conserving decay n → K − ℓ + requires dimension-ten operators that, in addition, would be accompanied by lower-dimensional ( B + L )-violating decay modes. An observation of n → Kℓ in the absence of other modes such as p → π 0 ℓ + , would then strongly suggest that ( B − L ) is violated.
Source: Journal of High Energy Physics
Institutions: Centro Científico Tecnológico de Valparaíso, Universidad Técnica Federico Santa María, Universidad Técnica Federico Santa María, Millennium Institute for Subatomic Physics at High-Energy Frontier, Saphir, University of La Serena, Universitat de València, Instituto de Física Corpuscular
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Awards: G103507813, G1105844351, G1175115578, G1272900390, G1610934229, G2262748287, G242948613, NEW NEUTRINO EFFECTIVE THEORY IN THE UNIVERSE:EXPLORING THEORIES USING NEUTRINOS AS A WINDOW TO NEW PHYSICS, G300979063, G3157494371, G3480869486, G4014979219, G425668148, G4511208782, G464105488, EXPLORING THE LIFETIME FRONTIER NOVEL SEARCHES FOR NEW PHYSICS IN PARTICLE COLLIDERS, G491712853, G5080475149, G5209569390, G5222023348, G5635532810, G7084143925, G7101642908, G7431399299, PROBING NEW PHYSICS WITH NEUTRINO MODELS AND DARK MATTER, G7805626310, G7863371703, G8497050386, G8672020489, G8715457421
OpenAlex ID: W7212364701