Light-cone sum rules for the $N\gamma \Delta$ transitions for real photons

Abstract

We examine the radiative $\Delta \to \gamma N$ transition at the real photon point $Q^2=0$ using the framework of light-cone QCD sum rules. In particular, the sum rules for the transition form factors $G_M(0)$ and $R_{EM}$ are determined up to twist 4. The result for $G_M(0)$ agrees with experiment within 10% accuracy. The agreement for $R_{EM}$ is also reasonable. In addition, we derive new light-cone sum rules for the magnetic moments of nucleons, with a complete account of twist-4 corrections based on a recent reanalysis of photon distribution amplitudes.

34 pages, 9 figures, revised version, published in Phys. Rev. D, one misplaced reference corrected

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Cited by in corpus (10)

• Determination of the magnetic susceptibility of the quark condensate using radiative heavy meson decays
• D-state effects in the electromagnetic N-Delta transition
• A Covariant model for the nucleon and the $\Delta$
• A model for the Delta(1600) resonance and gamma N -> Delta(1600) transition
• The Nucleon Distribution Amplitudes and their application to nucleon form factors and the $N\to \Delta$ transition at intermediate values of $Q^2$
• QCD sum rules analysis of the rare radiative Bc -> D*_s gamma decay
• N to $\Delta$ transition amplitudes from QCD sum rules
• Electromagnetic transition form factors, $E2/M1$ and $C2/M1$ ratios of the baryon decuplet
• Rare Radiative $B_c\to D_{s1}(2460)\gamma$ Transition in QCD
• Rare Radiative Decays of Vector and Axial-Vector $B_c$ Mesons to $(D_s,D_s^{\ast },D_{s1})$ Final States