Electroweak Transitions of Hyperons and Charmed Baryons: Opportunities and Prospects
Abstract
We present a phenomenology-driven overview of opportunities and outstanding challenges in baryon electroweak transitions, focusing on hyperon and charmed-baryon processes for which lattice-QCD results are available, including semileptonic decays and selected radiative, dileptonic, and neutrino-induced channels. We identify semileptonic decays of strange and charmed baryons as a particularly promising domain for synergy between phenomenology, experiment, and lattice QCD. Particular emphasis is placed on the determination of vector and axial form factors, the precision and model-independent extraction of |Vus| from hyperon semileptonic decays including radiative corrections, and on searches for non-standard interactions through lepton-flavor- and CP-violating observables. We examine the momentum dependence of form factors in ground-state transitions, highlight the emerging Ξc → Ξ semileptonic puzzle stemming from tensions between lattice-QCD predictions and experimental measurements, discuss inclusive decay rates, and outline strategies for extending these studies to transitions involving excited baryon states. For completeness, we review also results involving beauty-baryon decays.
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BibTeX
@misc{adlarson2026electroweak,
title = {{Electroweak Transitions of Hyperons and Charmed Baryons: Opportunities and Prospects}},
author = {Patrik Adlarson and Constantia Alexandrou and Simone Bacchio and Varvara Batozskaya and Johan Bijnens and Alexandre Brea Rodriguez and Gernot Eichmann and Andreas Konstantinou Andrzej Kupsc and Stefan Leupold and Piotr Salabura and Christoph Schwanda and Marcin Zieliński},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.03603},
eprint = {2610.03603},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.03603},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Electroweak Transitions of Hyperons and Charmed Baryons: Opportunities and Prospects
AU - Patrik Adlarson
AU - Constantia Alexandrou
AU - Simone Bacchio
AU - Varvara Batozskaya
AU - Johan Bijnens
AU - Alexandre Brea Rodriguez
AU - Gernot Eichmann
AU - Andreas Konstantinou Andrzej Kupsc
AU - Stefan Leupold
AU - Piotr Salabura
AU - Christoph Schwanda
AU - Marcin Zieliński
PY - 2026
DA - 2026/10/02
PB - arXiv
DO - 10.48550/arxiv.2610.03603
UR - https://arxiv.org/abs/2610.03603
AB - We present a phenomenology-driven overview of opportunities and outstanding challenges in baryon electroweak transitions, focusing on hyperon and charmed-baryon processes for which lattice-QCD results are available, including semileptonic decays and selected radiative, dileptonic, and neutrino-induced channels. We identify semileptonic decays of strange and charmed baryons as a particularly promising domain for synergy between phenomenology, experiment, and lattice QCD. Particular emphasis is placed on the determination of vector and axial form factors, the precision and model-independent extraction of |V_us| from hyperon semileptonic decays including radiative corrections, and on searches for non-standard interactions through lepton-flavor- and CP-violating observables. We examine the momentum dependence of form factors in ground-state transitions, highlight the emerging Ξ_c → Ξ semileptonic puzzle stemming from tensions between lattice-QCD predictions and experimental measurements, discuss inclusive decay rates, and outline strategies for extending these studies to transitions involving excited baryon states. For completeness, we review also results involving beauty-baryon decays.
ER -