Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-04-21
Phys.Rev.Lett. 81 (1998) 2646-2649
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 2 figures, ReVTeX
Scientific paper
10.1103/PhysRevLett.81.2646
We show that constraints from perturbative QCD calculations play a role in the nucleon to Delta(1232) electromagnetic transition even at moderate momentum transfer scales. The pQCD constraints, tied to real photoproduction data and unseparated resonance response functions, lead to explicit forms for the helicity amplitudes wherein the E2/M1 ratio remains small at moderately large momentum transfer.
Carlson Carl E.
Mukhopadhyay Nimai C.
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