PION ABSORPTION IN HE-4 ABOVE THE DELTA-RESONANCE

Authors
SMITH LC MINEHART RC BAKER OK DAY DB GIOVANETTI KL LOURIE R MARSHALL RM MILBRATH B RITCHIE BG SEALOCK RM TEDESCHI D THORNTON ST
Citation
Lc. Smith et al., PION ABSORPTION IN HE-4 ABOVE THE DELTA-RESONANCE, Physical review. C. Nuclear physics, 48(2), 1993, pp. 485-490
Citations number
18
Categorie Soggetti
Physics, Nuclear
Journal title
Physical review. C. Nuclear physics → ACNP
ISSN journal
05562813
Volume
48
Issue
2
Year of publication
1993
Pages
485 - 490
Database
ISI
SICI code
0556-2813(1993)48:2<485:PAIHAT>2.0.ZU;2-I
Abstract
The reaction He-4(pi+, pp)pn was measured at T(pi) = 500 MeV. The angu lar distribution of quasifree two-body absorption which was obtained a grees in detail with the free pid --> pp reaction and scales according to the number of T = 0 pn pairs in He-4. Possible evidence for pd fin al-state interactions is discussed. The extrapolated total cross secti on for four-body absorption is 2.5 +/- 0.6 mb, which is substantially less than predicted from a model based on DELTADELTA excitation.