Perturbative QCD calculations find that branching fractions for Ξ_b to Ξ lepton-pair decays lie within LHCb reach and that angular observables plus a specific ratio can constrain Wilson coefficients and extract |V_td/V_ts| independently of mesonic modes.
Test of lepton universality using $B^{+}\rightarrow K^{+}\ell^{+}\ell^{-}$ decays
6 Pith papers cite this work. Polarity classification is still indexing.
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abstract
A measurement of the ratio of the branching fractions of the $B^{+}\rightarrow K^{+}\mu^{+}\mu^{-}$ and $B^{+}\rightarrow K^{+}e^{+}e^{-}$ decays is presented using proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb$^{-1}$, recorded with the LHCb experiment at center-of-mass energies of 7 and 8 $\mathrm{\,Te\kern -0.1em V}$. The value of the ratio of branching fractions for the dilepton invariant mass squared range $1<q^{2}<6\mathrm{\,Ge\kern -0.1em V^2\!/}c^4$ is measured to be $0.745^{+0.090}_{-0.074}\mathrm{\,(stat)}\,\pm0.036\mathrm{\,(syst)}$. This value is the most precise measurement of the ratio of branching fractions to date and is compatible with the SM prediction within $2.6$ standard deviations.
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Introduces a reconstructible angular distribution for B to D* tau nu decays via tau to lepton chain to extract new physics parameters, projecting 5-6% sensitivities from simulation and lattice form factors.
Weak annihilation contributions are sizable in B_c^+ to D^{*+} lepton pair decays and must be included to obtain reliable Standard Model predictions for angular observables.
Silicon tracker PID suppresses backgrounds well for low-momentum b-tagging but requires drift-chamber cluster counting for high-momentum s-jet tagging, with 30 ps timing needed to improve rare b to s decay contamination by an order of magnitude over kinematics alone.
Four models for combined explanation of B anomalies are tested with general couplings, excluding three and constraining the fourth.
Review of the room left for B-decay anomalies inside the minimal low-energy leptoquark gauge model with SU(4)_C ⊗ SU(2)_L ⊗ U(1)_R symmetry.
citing papers explorer
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Semileptonic neutral current decays of $\Xi_b$ with dileptons or dineutrinos in the final state
Perturbative QCD calculations find that branching fractions for Ξ_b to Ξ lepton-pair decays lie within LHCb reach and that angular observables plus a specific ratio can constrain Wilson coefficients and extract |V_td/V_ts| independently of mesonic modes.
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New physics searches via angular distributions of $ \bar{B} \to D^* (\to D \pi) \tau (\to \ell \nu_\tau \bar{\nu}_\ell) \bar{\nu}_\tau$ decays
Introduces a reconstructible angular distribution for B to D* tau nu decays via tau to lepton chain to extract new physics parameters, projecting 5-6% sensitivities from simulation and lattice form factors.
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Weak Annihilation Contribution to Angular Observables in $B_{c}^+\to D^{\ast+}\ell^{+}\ell^{-}$ Decays
Weak annihilation contributions are sizable in B_c^+ to D^{*+} lepton pair decays and must be included to obtain reliable Standard Model predictions for angular observables.
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Flavor-physics benchmarks for tracker-based particle identification at the FCC-ee
Silicon tracker PID suppresses backgrounds well for low-momentum b-tagging but requires drift-chamber cluster counting for high-momentum s-jet tagging, with 30 ps timing needed to improve rare b to s decay contamination by an order of magnitude over kinematics alone.
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Combined explanation of the B-anomalies
Four models for combined explanation of B anomalies are tested with general couplings, excluding three and constraining the fourth.
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Lepton non-universality in $B$-decays in the minimal leptoquark gauge model
Review of the room left for B-decay anomalies inside the minimal low-energy leptoquark gauge model with SU(4)_C ⊗ SU(2)_L ⊗ U(1)_R symmetry.