Detailed comparison of the pp to p pn and pp to p d reactions at 951 MeV

Abdel-Bary, M.; Niskanen, J.; Budzanowski, A.; Machner, H.; Kravcikova, M.; Kliczewski, S.; Piskunov, N.; Jha, V.; Kilian, K.; Urban, J.; Roy, B. J.; Maier, R.; Kolev, D.; Hawranek, P.; Sitnik, I.; Kirillov, D.; Magiera, A.; Vankova, G.; Smiechowicz, M.; Martinska, G.; Protic, D.; Tsenov, R.; Hinterberger, F.; Nedev, S.; Lieb, J.; Kutsarova, T.; Lesiak, M.; Ernst, J.; Wilkin, C.; Siudak, R.; Prasuhn, D.; Chatterjee, A.; Ulicny, M.; von Rossen, P.

doi:10.1016/j.physletb.2005.01.100

Journal Article

Detailed comparison of the pp to p pn and pp to p d reactions at 951 MeV

Abdel-Bary, M.FZJ* ; Budzanowski, A. ; Chatterjee, A. ; Ernst, J. ; Hawranek, P. ; Hinterberger, F. ; Jha, V. ; Kilian, K.FZJ* ; Kliczewski, S.FZJ* ; Kirillov, D.FZJ* ; Kolev, D. ; Kravcikova, M. ; Kutsarova, T. ; Lesiak, M.FZJ* ; Lieb, J. ; Machner, H.FZJ* ; Magiera, A. ; Maier, R. ; Martinska, G. ; Nedev, S.FZJ* ; Niskanen, J. ; Piskunov, N. ; Prasuhn, D.FZJ* ; Protic, D.FZJ* ; von Rossen, P.FZJ* ; Roy, B. J. ; Sitnik, I. ; Siudak, R.FZJ* ; Smiechowicz, M.FZJ* ; Tsenov, R. ; Ulicny, M. ; Urban, J. ; Vankova, G.FZJ* ; Wilkin, C.FZJ*

2005
North-Holland Publ. Amsterdam

Physics letters / B 610, 31 (2005) [10.1016/j.physletb.2005.01.100]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10642 doi:10.1016/j.physletb.2005.01.100

Abstract: The positively charged pions produced in proton-proton collisions at a beam momentum of 1640 MeV/c were measured in the forward direction with a high resolution magnetic spectrograph. The missing mass distribution shows the bound state (deuteron) clearly separated from the pn continuum. Despite the very good resolution, there is no evidence for any significant production of the pn system in the spin-singlet state. However, the sigma (pp -> pi(+)pn)/sigma(pp -> pi(+)d) cross section ratio is about twice as large as that predicted from S-wave final-state-interaction theory and it is suggested that this is due to D-state effects in the pn system. (c) 2005 Published by Elsevier B.V.

Keyword(s): p p: exclusive reaction ; pi+: hadroproduction ; production: small-angle ; deuteron: hadroproduction ; mass spectrum: missing-mass ; channel cross section: ratio ; final-state interaction ; partial wave ; magnetic spectrometer: experimental results ; Juelich COSY PS ; p p --> n p pi+ ; p p --> deuteron pi+ ; 1.64 GeV/c ; pion production (auto) ; spin singlet/triplet final state interactions (auto)