Semileptonic decays of heavy mesons

Abstract

The semileptonic and leptonic decays of heavy mesons are studied as a phenomenological application and exploration of a heavy-quark limit of Dyson-Schwinger equations. The single form factor, $\xi (w)$, which characterises the semileptonic decay in this limit, is calculated and compares well with recent experimental extractions. We obtain a lower bound of 1/3 on the slope-parameter ${\rho }^2\equiv -{\xi }^{\prime }(1)$, which, in calculations with realistic input, is exceeded by a great deal: agreement with experimental data requiring ${\rho }^2\sim 1.2-1.6$. The flavour and momentum dependence of the light-quark propagators has observable consequences.

11 pages, LaTeX, epsfig.sty, elsart.sty

References in corpus (1)

• The analytic structure of heavy quark propagators

Cited by in corpus (41)

• Collective perspective on advances in Dyson-Schwinger Equation QCD
• Exclusive semileptonic and nonleptonic decays of the Bc meson
• Hadron Properties and Dyson-Schwinger Equations
• Aspects of Hadron Physics
• Survey of heavy-meson observables
• Strong and Radiative Decays of Heavy Flavored Baryons
• The semileptonic decays of the B_c meson
• Chiral susceptibility and the scalar Ward identity
• Exciting flavored bound states
• B- to light-meson transition form factors
• Mind the gap
• Chemical potential and the gap equation
• Charm and Bottom Baryon Decays in the Bethe-Salpeter Approach: Heavy to Heavy Semileptonic Transitions
• Strong D* -> D+pi and B* -> B+pi couplings
• Decay constants of the pseudoscalar mesons in the framework of the coupled Schwinger-Dyson equation and Bethe-Salpeter equation
• Heavy- to light-meson transition form factors
• Effects of a dressed quark-gluon vertex in vector heavy-light mesons and theory average of B(c)* meson mass
• Flavor SU(4) breaking between effective couplings
• The Calculation of Vacuum Properties from the Global Color Symmetry Model
• Effects of a dressed quark-gluon vertex in pseudoscalar heavy-light mesons
• Leptonic and Semileptonic Decays of Pseudoscalar Mesons
• Pion susceptibility of the QCD vacuum from an effective quark-quark interaction
• Couplings between the $\rho$ and $D$- and $D^{\ast }$-mesons
• Mesons as qbar-q Bound States from Euclidean 2-Point Correlators in the Bethe-Salpeter Approach
• The Productions and Strong Decays of $D_q(2S)$ and $B_q(2S)$
• Light-quarkonium spectra and orbital-angular-momentum decomposition in a Bethe-Salpeter-equation approach
• Tensor susceptibility of the QCD vacuum from an effective quark-quark interaction
• Application of Jain and Munczek's bound-state approach to gamma gamma-processes of pi0, eta_c and eta_b
• $V_{cb}$ from the semileptonic decay $B\to D\ell {\bar{\nu }}_{\ell }$ and the properties of the $D$ meson distribution amplitude
• The Strong Decays of X(3940) and X(4160)
• Semi-leptonic decays of $B^{\ast }$, $B_s^{\ast }$, and $B_c^{\ast }$ with the Bethe-Salpeter method
• Insights into the quark-gluon vertex from lattice QCD and meson spectroscopy
• Decay constants of the pseudoscalar charmonium and bottomonium
• Ground state mass spectrum for scalar diquarks with Bethe-Salpeter equation
• Chiral extrapolation of lattice data for B-meson decay constant
• Meson spectroscopy and properties using Dyson-Schwinger equations
• Comment to: "A note on failure of the ladder approximation to QCD" [Phys. Lett. B 640 (2006) 196 ]
• The effect of the ultraviolet part of the gluon propagator on the heavy quark propagator
• U(5) Nambu-Jona-Lasinio model with flavor dependent coupling constants: pseudoscalar and scalar mesons masses
• Electromagnetic structure and weak decay of pseudoscalar mesons in a light-front QCD-inspired model
• Unexpected pattern of transitions to radial excitations by heavy quark current