Light Cone Sum Rules for gamma* N -> Delta Transition Form Factors

Details Light Cone Sum Rules for gamma* N -> Delta Transition Form Factors Light Cone Sum Rules for gamma* N -> Delta Transition Form Factors

2005-10-18

arxiv.org/abs/hep-ph/0510237v4

Phys.Rev. D73 (2006) 034020

Physics

High Energy Physics

High Energy Physics - Phenomenology

38 pages, 10 figures; some typos fixed and references added, to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.73.034020

A theoretical framework is suggested for the calculation of gamma* N -> Delta 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

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