Year: 2026
Type: preprint
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 $|V_{us}|$ 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 $Ξ_c \to Ξ$ 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.
Source: arXiv (Cornell University)
Institutions: Uppsala University, National Centre for Nuclear Research, Cyprus Institute, University of Cyprus, Institute of High Energy Physics, Lund University, École Polytechnique Fédérale de Lausanne, University of Graz, Nawi Graz, Jagiellonian University, Austrian Academy of Sciences, MBI - Marietta-Blau-Institut für Teilchenphysik
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: Ισχυρές αλληλεπιδράσεις σε ένα χωροχρονικό πλέγμα: Η Κβαντική Χρωμοδυναμική και η υπερσυμμετρική εκδοχή της, G4385058657, Dibaryons with functional methods, Muon HVP and smeared R-ratio from Lattice QCD, G7477642899, Precision nucleon structure from large-scale analyses and simulations in lattice QCD, G9000201163
OpenAlex ID: W7220421685