A method to extract fs/fd and similar ratios from exclusive semi-leptonic B decays yields a 7% uncertainty constraint using existing measurements.
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A z=6.64 Little Red Dot host shows an AGN-driven ionised outflow reaching ~5500 km/s FWHM, with low mass-loading and clear LRD spectral signatures in the compact nucleus.
Massive dark fermions modify rate distributions in B to D(*) lepton invisible decays within weak effective theory, affecting |V_cb| extraction.
A combined fit to B to D(*) l nu data yields R^{±0}=1.062(19) as evidence for isospin violation in Υ(4S) decays and branching fractions up to 1.6σ larger than prior averages, addressing inconsistencies in V_cb extractions.
Joint Bayesian fit of lattice form factors and Belle angular data gives |V_cb| = 0.03997(71) in the SM with no resolution of the exclusive-inclusive puzzle and excludes scalar leptoquark NP at 1.0 TeV and vector leptoquark at 2.5 TeV at 68% CL.
Covariant light-front quark model calculations of B to D(1S,2S) and D*(1S,2S) semi-leptonic branching ratios match light-lepton data but underpredict tau modes, yielding R(D)=0.261 and R(D*)=0.228.
citing papers explorer
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Extracting production fractions of $b$ hadrons from exclusive semi-leptonic decays
A method to extract fs/fd and similar ratios from exclusive semi-leptonic B decays yields a 7% uncertainty constraint using existing measurements.
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Probing Higgs and Top Interactions through the Muon Lens at multi-TeV Muon Colliders
A z=6.64 Little Red Dot host shows an AGN-driven ionised outflow reaching ~5500 km/s FWHM, with low mass-loading and clear LRD spectral signatures in the compact nucleus.
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Probing Light Dark Fermions in $B \to D^{(*)}\ell X_{\rm inv}$ via Rate Distributions
Massive dark fermions modify rate distributions in B to D(*) lepton invisible decays within weak effective theory, affecting |V_cb| extraction.
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$\bar B\to D^{(*)}\ell\bar \nu$ Branching Ratios and Evidence for Isospin Breaking in $\Upsilon(4S)$ Decays
A combined fit to B to D(*) l nu data yields R^{±0}=1.062(19) as evidence for isospin violation in Υ(4S) decays and branching fractions up to 1.6σ larger than prior averages, addressing inconsistencies in V_cb extractions.
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Angular Analysis of $B \to D^{*}\ell \bar{\nu}_{\ell}$ from Lattice and Experiment: $|V_{cb}|$ and New Physics Constraints
Joint Bayesian fit of lattice form factors and Belle angular data gives |V_cb| = 0.03997(71) in the SM with no resolution of the exclusive-inclusive puzzle and excludes scalar leptoquark NP at 1.0 TeV and vector leptoquark at 2.5 TeV at 68% CL.
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Semi-leptonic decays $B \to D^{(*)}(1S,2S)\ell \nu_{\ell}$ within the covariant light-front approach
Covariant light-front quark model calculations of B to D(1S,2S) and D*(1S,2S) semi-leptonic branching ratios match light-lepton data but underpredict tau modes, yielding R(D)=0.261 and R(D*)=0.228.