PreprintarXiv licencearXiv
Probing the neutrino mass through semileptonic decays
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.
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BibTeX
@misc{chevallier2026probing,
title = {{Probing the neutrino mass through semileptonic decays}},
author = {Claire Chevallier},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.01808},
eprint = {2610.01808},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.01808},
}
RIS
TY - UNPB
TI - Probing the neutrino mass through semileptonic decays
AU - Claire Chevallier
PY - 2026
DA - 2026/10/01
PB - arXiv
DO - 10.48550/arxiv.2610.01808
UR - https://arxiv.org/abs/2610.01808
AB - 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.
ER -