APPROACH TO PERTURBATIVE RESULTS IN THE N-DELTA TRANSITION

Authors
CARLSON CE MUKHOPADHYAY NC
Citation
Ce. Carlson et Nc. Mukhopadhyay, APPROACH TO PERTURBATIVE RESULTS IN THE N-DELTA TRANSITION, Physical review letters, 81(13), 1998, pp. 2646-2649
Citations number
41
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
81
Issue
13
Year of publication
1998
Pages
2646 - 2649
Database
ISI
SICI code
0031-9007(1998)81:13<2646:ATPRIT>2.0.ZU;2-X
Abstract
We show that constraints from perturbative QCD (PQCD) calculations pla y a role in the nucleon to Delta(1232) electromagnetic transition even at moderate momentum transfer scales. The PQCD constraints, tied to r eal 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. [S0031-9007 (98)07140-3].