Light cone sum rules forγ*N→Δtransition form factors

, φ Decay Form Factors from Light - Cone Sum Rules Revisited

We present an improved calculation of B → light vector form factors from light-cone sum rules, including one-loop radiative corrections to twist-2 and twist-3 contributions, and leading order twist-4 corrections. The total theoretical uncertainty of our results at zero momentum transfer is typically 10% and can be improved, at least in part, by reducing the uncertainty of hadronic input paramet...

Light-Cone Sum Rules for the Nucleon Form Factors

We argue that soft non-factorisable terms give a significant contribution to the baryon form factors at intermediate momentum transfers and set up a framework for the calculation of such terms in the light-cone sum rule approach. Among them, contributions of three-quark states with different helicity structure compared to the leading twist prove to be the most important. The leading-order sum r...

Improved approach to the heavy - to - light form factors in the light - cone QCD sum rules ∗

A systematic analysis shows that the main uncertainties in the form factors are due to the twist-3 wave functions of the light mesons in the light-cone QCD sum rules. We propose an improved approach, in which the twist-3 wave functions doesn’t make any contribution and therefore the possible pollution by them can be avoided, to re-examine B → π semileptonic form factors. Also, a comparison betw...

Systematic Errors of Transition Form Factors Extracted by Means of Light-cone Sum Rules

This talk presents results of our study of heavy-to-light transition form factors extracted with the help of light-cone sum rules. We employ a model with scalar particles interacting via massless-boson exchange and study the heavy-to-light correlator, relevant for the extraction of the transition form factor. We calculate this correlator in two different ways: by making use of the Bethe–Salpete...

7 Analysis of the Σ − n form - factors with light - cone QCD sum rules