2025/06/14 by Aritra Biswas, Nico Gubernari, Biswas, Aritra +5 · 1 citation
Physics and Astronomy · #Particle physics theoretical and experimental studies #Cosmology and Gravitation Theories #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2506.12478
We explore the impact of a combined analysis of Bd,s→ K(*) form factors on a set of L-observables. The L-observables are constructed from ratios of branching fractions in Bs→ VV,PP,PV versus Bd → VV,PP,PV decays with P=K0,K0 and V=K*0,K*0, thereby partially reducing their hadronic uncertainties. We show the change of the Standard Model predictions of the L-observables under different determinations of the ratio of the relevant form factors (with correlations) including lattice QCD data and a novel light-cone sum rule analysis. In addition, we provide precise results for all Bd,s → K(*) form factors in machine-readable files. We find that the inclusion of our up-to-date results, as well as the use or omission of lattice QCD data for the form factors, has a significant impact on the L-observables. We also discuss how the New Physics interpretation is affected by the updated form factors and present revised predictions for the mechanism identified in our analysis of B → VP decays, now employing more suitable new experimental observables defined in this paper.