2-NUCLEON KNOCK-OUT INVESTIGATED WITH THE SEMI-EXCLUSIVE C-12(E,E'P)-REACTION

Citation
Ljhm. Kester et al., 2-NUCLEON KNOCK-OUT INVESTIGATED WITH THE SEMI-EXCLUSIVE C-12(E,E'P)-REACTION, Physics letters. Section B, 344(1-4), 1995, pp. 79-84
Citations number
14
Categorie Soggetti
Physics
Journal title
ISSN journal
03702693
Volume
344
Issue
1-4
Year of publication
1995
Pages
79 - 84
Database
ISI
SICI code
0370-2693(1995)344:1-4<79:2KIWTS>2.0.ZU;2-0
Abstract
The C-12(e, e' p) reaction has been studied in the dip region, at an e nergy transfer o = 212 MeV and a three-momentum transfer /q/ = 270 MeV /c. The data cover a missing energy range 0-180 MeV and include missin g momenta up to 750 MeV/c. The cross sections, measured at various ang les between the detected proton and q, show a clear signature for two- nucleon knock-out. At large angles, the measured strength can mainly b e attributed to the coupling of the virtual photon to pion exchange cu rrents and intermediate Delta-excitation. The data at small angles can not be explained by these mechanisms alone. It is suggested that addit ional strength originates from the emission of a correlated nucleon pa ir.