Spin-triplet final-state dominance in the pp -> pn pi+ reaction at 492 MeV

Simple item page
dc.creatorAbaev, V.
dc.creatorBuescher, M.
dc.creatorDymov, S.
dc.creatorHartmann, M.
dc.creatorKacharava, A.
dc.creatorKomarov, V. I.
dc.creatorKoptev, V.
dc.creatorKurbatov, V.
dc.creatorMikirtychiants, S.
dc.creatorNekipelov, M.
dc.creatorPetrus, A.
dc.creatorStroeher, H.
dc.creatorUzikov, Yu. N.
dc.creatorWilkin, C.
dc.creatorYaschenko, S.
dc.date2001-05-08
dc.date2001-09-13
dc.date.accessioned2026-07-07T12:03:59Z
dc.date.available2026-07-07T12:03:59Z
dc.descriptionThe near-forward cross section for the pp -> pn pi^+ reaction has been measured at 492 MeV by using the large acceptance ANKE magnetic spectrometer placed at an internal target position of the storage ring COSY-Juelich. Protons and pions emitted near zero degrees were detected in coincidence, and those with theta_pi <= 2 degrees and theta_p <= 2.5degrees were subjected to detailed analysis. Under these conditions, the excitation energy in the np system was below 3 MeV over the measured momentum range. This is the region of the np final-state-interaction peak, which was measured with a resolution of a fraction of an MeV. The shape of the peak allows one to conclude that the fraction of final spin-singlet np pairs is below about 10%. By using the results of scattering theory, this limit is confirmed through a comparison with the cross section for pp -> d pi^+. The smallness of the singlet contribution is consistent with trends seen in lower energy data.
dc.description10 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/nucl-ex/0105002
dc.identifierhttp://arxiv.org/abs/nucl-ex/0105002
dc.identifierPhys.Lett.B521:158-164,2001
dc.identifierdoi:10.1016/S0370-2693(01)01229-1
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/207980
dc.subjectNuclear Experiment
dc.titleSpin-triplet final-state dominance in the pp -> pn pi+ reaction at 492 MeV
dc.typetext

Files

Collections

arXiv