DOUBLE NEUTRAL PION-PHOTOPRODUCTION AT THRESHOLD

Authors
BERNARD V KAISER N MEISSNER UG
Citation
V. Bernard et al., DOUBLE NEUTRAL PION-PHOTOPRODUCTION AT THRESHOLD, Physics letters. Section B, 382(1-2), 1996, pp. 19-23
Citations number
17
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
382
Issue
1-2
Year of publication
1996
Pages
19 - 23
Database
ISI
SICI code
0370-2693(1996)382:1-2<19:DNPAT>2.0.ZU;2-0
Abstract
We consider the chiral expansion of the threshold amplitude for the re action gamma p --> pi(0) pi(0)p to order O(M(pi)(2)). We substantiate a claim that this photoproduction channel is significantly enhanced cl ose to threshold due to pion loops. A precise measurement of the corre sponding cross sections is called for which allows to test chiral pert urbation theory.