Zusammenfassung
We examine the radiative Delta ->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 ...
Zusammenfassung
We examine the radiative Delta ->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.
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