The Semileptonic B Frontier: LHC, B-factories, Lattice QCD & the Hunt for Precision
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 → c/u ℓν) and neutral-current (b → s ℓ+ℓ-) 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.
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BibTeX
@misc{fazio2026semileptonic,
title = {{The Semileptonic B Frontier: LHC, B-factories, Lattice QCD & the Hunt for Precision}},
author = {F de Fazio and P de Simone and M Fedele and G Finocchiaro and F Mescia and M Rotondo and A Barone and B Capdevila and M de Cian and L Dreyfus and M Fael and G Finauri and G Gagliardi and G Gaudino and D Giusti and N Gubernari and A-M Heyn and F Manganella and E Minucci and B Mitreska and E Manoni and T Martinov and L Paolucci and Z Polonsky and A Poluektov and M Palutan and F Sanfilippo and S Simula and A Smecca and N Tantalo and A Tinari and A Vaquero and R Vazquez Gomez and M Valli and L Vittorio and V Vobbilisetti},
howpublished = {HAL},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.19917},
eprint = {2610.19917},
archivePrefix = {arXiv},
url = {https://hal.science/hal-05842456v1},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - The Semileptonic B Frontier: LHC, B-factories, Lattice QCD & the Hunt for Precision
AU - F de Fazio
AU - P de Simone
AU - M Fedele
AU - G Finocchiaro
AU - F Mescia
AU - M Rotondo
AU - A Barone
AU - B Capdevila
AU - M de Cian
AU - L Dreyfus
AU - M Fael
AU - G Finauri
AU - G Gagliardi
AU - G Gaudino
AU - D Giusti
AU - N Gubernari
AU - A-M Heyn
AU - F Manganella
AU - E Minucci
AU - B Mitreska
AU - E Manoni
AU - T Martinov
AU - L Paolucci
AU - Z Polonsky
AU - A Poluektov
AU - M Palutan
AU - F Sanfilippo
AU - S Simula
AU - A Smecca
AU - N Tantalo
AU - A Tinari
AU - A Vaquero
AU - R Vazquez Gomez
AU - M Valli
AU - L Vittorio
AU - V Vobbilisetti
PY - 2026
DA - 2026/10/14
PB - HAL
DO - 10.48550/arxiv.2610.19917
UR - https://hal.science/hal-05842456v1
AB - 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 → c/u ℓν) and neutral-current (b → s ℓ^+ℓ^-) 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.
ER -