CHIRAL-SYMMETRY AND THE REACTION GAMMA-P-]PI(0)P

Authors
BERNARD V KAISER N MEISSNER UG
Citation
V. Bernard et al., CHIRAL-SYMMETRY AND THE REACTION GAMMA-P-]PI(0)P, Physics letters. Section B, 378(1-4), 1996, pp. 337-341
Citations number
31
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
378
Issue
1-4
Year of publication
1996
Pages
337 - 341
Database
ISI
SICI code
0370-2693(1996)378:1-4<337:CATRG>2.0.ZU;2-L
Abstract
We analyze the new threshold data for neutral pion photoproduction off protons in the framework of heavy baryon chiral perturbation theory. We show that large loop corrections are needed to understand the S-wav e multipole E(0+) and that all pertinent low-energy constants can be u nderstood within the framework of resonance exchange saturation. Previ ous inconsistencies in the description of this reaction in the thresho ld region are resolved.