Work

Probing the neutrino mass through semileptonic decays

Year: 2026

Type: preprint

Abstract: We argue that a detailed analysis of semileptonic decays can test the possibility of a massive neutrino. The key observable, related to the forward-backward asymmetry, is exactly zero for a massless neutrino but becomes non-zero if the neutral lepton is heavy and interacts with Standard Model fields via left-handed operators. For right-handed interactions, this quantity differs significantly from zero even for a massless right-handed neutrino. We demonstrate this explicitly using the example of a pseudoscalar meson decaying into another pseudoscalar meson.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.01808

Author: Chevallier, Claire

Institutions: Centre National de la Recherche Scientifique, Université Paris-Saclay, Institut National de Physique Nucléaire et de Physique des Particules

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: European Commission, Javna Agencija za Raziskovalno Dejavnost RS

Awards: Semileptonic probes of b-quark physics at future flavor experiments, Hunting Invisibles: Dark sectors, Dark matter and Neutrinos, Theoretical physics of nuclei, particles and fields, Coloured scalars in physics beyond Standard Model

OpenAlex ID: W7216136101

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