Year: 2026
Type: preprint
Abstract: This review document summarizes the main outcomes and key theoretical and experimental developments discussed at the workshop ``The Semileptonic $B$ Frontier: LHC, $B$-Factories, Lattice QCD & the Hunt for Precision'', held at Laboratori Nazionali di Frascati on 16--18 February, https://agenda.infn.it/event/49469/. Bringing together experimentalists and theorists, the meeting addressed recent advances and outstanding challenges in both charged-current ($b \to c/u\,\ellν$) and neutral-current ($b \to s\,\ell^+\ell^-$) semileptonic $b$-hadron decays. We synthesize current experimental measurements from Belle, Belle~II, and LHCb with state-of-the-art theoretical inputs---including Lattice QCD determinations, Heavy Quark Expansion (HQE) frameworks, and QED radiative corrections. In addition to reviewing the status of CKM matrix elements, hadronic form factor extractions, and Lepton Flavor Universality (LFU) tests, this report highlights novel observables and fitting techniques designed to maximize the sensitivity of future analyses and guide upcoming data-taking campaigns.
Source: arXiv (Cornell University)
Authors: De Fazio, F., De Simone, P., Fedele, M., Finocchiaro, G., Mescia, F., Rotondo, M., Barone, A., Capdevila, B., De Cian, M., Dreyfus, L., Fael, M., Finauri, G., Gagliardi, G., Gaudino, G., Giusti, D., Gubernari, N., Heyn, A-M., Manganella, F., Minucci, E., Mitreska, B., Manoni, E., Martinov, T., Paolucci, L., Polonsky, Z., Poluektov, A., Palutan, M., Sanfilippo, F., Simula, S., Smecca, A., Tantalo, N., Tinari, A., Vaquero, A., Gomez, R. Vazquez, Valli, M., Vittorio, L., Vobbilisetti, V.
Institutions: Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, Johannes Gutenberg University Mainz, Mainz Institute for Theoretical Physics, Institut de Ciències del Cosmos, Universitat de Barcelona, University of Manchester, Centre National de la Recherche Scientifique, Aix-Marseille Université, Centre de physique des particules de Marseille, Institut National de Physique Nucléaire et de Physique des Particules, University of Padua, Istituto Nazionale di Fisica Nucleare, Istituto Nazionale di Fisica Nucleare, Sezione di Torino, University of Turin, Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Forschungszentrum Jülich, Jülich Supercomputing Centre, University of Regensburg, University of Bonn, University of Rome Tor Vergata, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, University of Zurich, Universidad de Zaragoza, Centro de Astropartículas y Física de Altas Energías, Istituto Nazionale di Fisica Nucleare, Sezione di Roma I, Sapienza University of Rome
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: European Commission
Award: G972786147
OpenAlex ID: W7222104752