Gravitational transition form factors of N → ∆ via QCD light-cone sum rules

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

5 Light Cone Sum Rules for γ ∗ N → ∆ Transition Form Factors

A theoretical framework is suggested for the calculation of γN → ∆ transition form factors using the light-cone sum rule approach. Leading-order sum rules are derived and compared with the existing experimental data. We find that the transition form factors in a several GeV region are dominated by the “soft” contributions that can be thought of as overlap integrals of the valence components of ...

ΣQΛQ transition magnetic moments in light cone QCD sum rules

Using the general form of ΣQ and ΛQ (Q = b or c) currents, ΣQΛQ transition magnetic moments are calculated in framework of the light cone QCD sum rules method. In this approach nonperturbative effects are described by the photon wave functions and only two–particle photon wave functions are taken into account. Our predictions on transition magnetic moments are μΣcΛc = −(1.5±0.4)μN and μΣbΛb = −...

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...

π with light - cone QCD sum rules

In this article, we take the point of view that the light scalar meson a0(980) is a conventional qq̄ state, and calculate the coupling constants ga0ηπ0 and ga0η′π0 with the light-cone QCD sum rules. The central value of the coupling constant ga0ηπ0 is consistent with the one extracted from the radiative decay φ(1020) → a0(980)γ → ηπ0γ. The central value and lower bound of the decay width Γa0→ηπ0...