5 Light Cone Sum Rules for γ ∗ N → ∆ Transition Form Factors
نویسنده
چکیده
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 the hadron wave functions. The “minus” components of the quark fields contribute significantly to the result, which can be reinterpreted as large contributions of the quark orbital angular momentum. PACS numbers: 12.38.-t, 14.20.Dh, 13.40.Gp
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