Soft-pion theorem for hard near-threshold pion production - art. no. 022001

Authors
Pobylitsa, PV Polyakov, MV Strikman, M
Citation
Pv. Pobylitsa et al., Soft-pion theorem for hard near-threshold pion production - art. no. 022001, PHYS REV L, 8702(2), 2001, pp. 2001-NIL_16
Citations number
31
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
8702
Issue
2
Year of publication
2001
Pages
2001 - NIL_16
Database
ISI
SICI code
0031-9007(20010709)8702:2<2001:STFHNP>2.0.ZU;2-6
Abstract
We prove a new soft-pion theorem for the near-threshold pion production by a hard electromagnetic probe. This theorem relates various near-threshold p ion-production amplitudes to the nucleon distribution amplitudes. The new s oft-pion theorem is in good agreement with the SLAC data for the structure function F-2(p)(W,Q(2)) for W-2 less than or equal to 1.4 GeV2 and 9 less t han or equal to Q(2) less than or equal to 30.7 GeV2.