Heavy+light pseudoscalar meson semileptonic transitions

Abstract

A symmetry-preserving regularisation of a vector$\times$vector contact interaction (SCI) is used to deliver a unified treatment of semileptonic transitions involving $\pi$, $K$, $D_{(s)}$, $B_{(s,c)}$ initial states. The framework is characterised by algebraic simplicity, few parameters, and the ability to simultaneously treat systems from Nambu-Goldstone modes to heavy+heavy mesons. Although the SCI form factors are typically somewhat stiff, the results are comparable with experiment and rigorous theory results. Hence, predictions for the five unmeasured $B_{s,c}$ branching fractions should be a reasonable guide. The analysis provides insights into the effects of Higgs boson couplings via current-quark masses on the transition form factors; and results on $B_{(s)}\to D_{(s)}$ transitions yield a prediction for the Isgur-Wise function in fair agreement with contemporary data.

17 pages, 13 figures, 3 tables

References in corpus (26)

• Baryons as relativistic three-quark bound states
• Electron-Ion Collider in China
• Form Factors from Light-Cone Sum Rules with B-Meson Distribution Amplitudes
• Insights into the Emergence of Mass from Studies of Pion and Kaon Structure
• Abelian anomaly and neutral pion production
• pi- and rho-mesons, and their diquark partners, from a contact interaction
• $B\to \pi \ell \nu$ and $B_s\to K\ell \nu$ form factors and $|V_{ub}|$ from 2+1-flavor lattice QCD with domain-wall light quarks and relativistic heavy quarks
• B-meson decay constants: a more complete picture from full lattice QCD
• $B_{(s)},D_{(s)}\to \pi ,K,\eta ,\rho ,K^{\ast },\omega ,\varphi$ Transition Form Factors and Decay Rates with Extraction of the CKM parameters $|V_{ub}|$, $|V_{cs}|$, $|V_{cd}|$
• Branching fraction and form-factor shape measurements of exclusive charmless semileptonic B decays, and determination of |V_{ub}|
• $B_s\to K\ell \nu$ form factors from lattice QCD
• Revealing the structure of light pseudoscalar mesons at the Electron-Ion Collider
• Heavy-to-light form factors on the light cone
• Empirical Consequences of Emergent Mass
• Masses of Light and Heavy Mesons and Baryons: A Unified Picture
• B- to light-meson transition form factors
• Masses of positive- and negative-parity hadron ground-states, including those with heavy quarks
• Masses and decay constants of D(s)* and B(s)* mesons with Nf = 2 + 1 + 1 twisted mass fermions
• The BESIII Physics Programme
• Study on $B_s\to D_{sJ}(2317,2460)l\bar{\nu }$ Semileptonic Decays in the CQM Model
• Measurement of the $D^0\to {\pi }^{-}{e}^{+}{\nu }_e$ differential decay branching fraction as a function of $q^2$ and study of form factor parameterizations
• Measures of pion and kaon structure from generalised parton distributions
• Improved $V_{cs}$ determination using precise lattice QCD form factors for $D\to K\ell \nu$
• Self-consistent light-front quark model analysis of $B\to D\ell {\nu }_{\ell }$ transition form factors
• Distribution amplitudes of light diquarks
• Symmetry-preserving contact interaction model for heavy-light mesons

Cited by in corpus (6)

• Vector-meson production and vector meson dominance
• Dynamical diquarks in the ${\mathbf{\gamma }}^{(\ast )}\mathbf{p}\to \mathbf{N}(1535){\frac{1}{2}}^{-}$ transition
• Bethe-Salpeter kernel and properties of strange-quark mesons
• A symmetry preserving contact interaction treatment of the kaon
• Heavy + heavy and heavy + light pseudoscalar to vector semileptonic transitions
• Semileptonic transitions: $B_{(s)}\to \pi (K)$; $D_s\to K$; $D\to \pi ,K$; and $K\to \pi$