Journal article
Analyzing-power measurement in pn-pp(1S0): Pion absorption by quark clusters?
C Ponting, DA Hutcheon, MA Moinester, PL Walden, DR Gill, RR Johnson, F Duncan, G Sheffer, P Weber, V Sossi, A Feltham, M Hanna, R Olszewski, M Pavan, FM Rozon, M Sevior, D Ashery, RP Trelle, H Hahn, B Mayer
Physical Review Letters | AMER PHYSICAL SOC | Published : 1989
Abstract
We have measured analyzing powers in d(p,-pp)p at a beam energy of 400 MeV and laboratory pion detector angles of 35°and 43°. The - and two of the outgoing protons were detected in coincidence in a geometry which selected the quasifree two-body reaction pn-pp(1S0). The analyzing-power data combined with He3(-,pn)n differential cross sections allow determination of the transition amplitudes. The results indicate a significant contribution from a very short-range part of the nucleon-nucleon interaction. © 1989 The American Physical Society.