Models for Light-Cone Meson Distribution Amplitudes

Abstract

Leading-twist distribution amplitudes (DAs) of light mesons like pi,rho etc. describe the leading nonperturbative hadronic contributions to exclusive QCD reactions at large energy transfer, for instance electromagnetic form factors. They also enter B decay amplitudes described in QCD factorisation, in particular nonleptonic two-body decays. Being nonperturbative quantities, DAs cannot be calculated from first principles, but have to be described by models. Most models for DAs rely on a fixed order conformal expansion, which is strictly valid for large factorisation scales, but not always sufficient in phenomenological applications. We derive models for DAs that are valid to all orders in the conformal expansion and characterised by a small number of parameters which are related to experimental observables.

19 pages, 10 figures

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Cited by in corpus (29)

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• |V_td/V_ts| from B-> V gamma
• Modelling light-cone distribution amplitudes from non-relativistic bound states
• B->eta(') Form Factors in QCD
• Two-loop Corrections to the B to pi Form Factor from QCD Sum Rules on the Light-Cone and |V(ub)|
• |V_ub| and Constraints on the Leading-Twist Pion Distribution Amplitude from B->pi l nu
• 5D Attractors with Higher Derivatives
• B-Meson Light-Cone Distribution Amplitude: Perturbative Constraints and Asymptotic Behaviour in Dual Space
• The leading-twist pion and kaon distribution amplitudes from the QCD instanton vacuum
• Testing QCD Sum Rules on the Light-Cone in D->(pi,K) l nu Decays
• Distribution amplitudes of light-quark mesons from lattice QCD
• The pure annihilation type B_c to M_2 M_3 decays in the perturbative QCD approach
• Distribution Amplitudes of Heavy Mesons and Quarkonia on the Light Front
• Leading-twist pion and kaon distribution amplitudes in the gauge-invariant nonlocal chiral quark model from the instanton vacuum
• Flavour Physics and CP Violation
• Improved perturbative QCD formalism for $B_c$ meson decays
• Form factors $f_{+}^{B\to \pi }(0)$ and $f_{+}^{D\to \pi }(0)$ in $QCD$ and determination of $|V_{ub}|$ and $|V_{cd}|$
• ${\bar{B}}_s^0\to K\pi ,KK$ decays and effects of the next-to-leading order contribution
• Systematic Study on QCD Interactions of Heavy Mesons with $\rho$ Meson
• $a_1(1260)$-meson longitudinal twist-2 distribution amplitude and the $D\to a_1(1260){\ell }^{+}{\nu }_{\ell }$ decay processes
• Exclusive processes $e^{+}{e}^{-}\to VP$ in $k_T$ factorization
• Effect of resonance for $CP$ asymmetry of the decay process ${\bar{B}}_s\to P{\pi }^{+}{\pi }^{-}$ in perturbative QCD
• Final-state Polarization in Bs Decays
• Charmless hadronic $B\to (f_1(1285),f_1(1420))P$ decays in the perturbative QCD approach
• |V_td/V_ts| from QCD Sum Rules on the Light-Cone
• Non-leptonic B-decays in and beyond QCD Factorisation