Production of the 1S0 diproton in the pp-&gt;pp pi0 reaction at 0.8 GeV

Dymov, S.; Khoukaz, A.; Merzliakov, S.; Kulikov, A.; Gusev, D.; Ströher, H.; Hejny, V.; Kulessa, P.; Mussgiller, A.; Lang, N.; Mikirtytchiants, S.; Mersmann, T.; Hartmann, M.; Uzikov, Yu.; Rathmann, F.; Komarov, V.; Büscher, M.; Macharashvili, G.; Wilkin, C.; Kurbatov, V.; Kacharava, A.; Prasuhn, D.; Yaschenko, S.; Schleichert, R.

doi:10.1016/j.physletb.2006.03.012

Journal Article

Production of the 1S0 diproton in the pp->pp pi0 reaction at 0.8 GeV

Dymov, S. ; Büscher, M.FZJ* ; Gusev, D. ; Hartmann, M.FZJ* ; Hejny, V.FZJ* ; Kacharava, A. ; Khoukaz, A. ; Komarov, V. ; Kulessa, P. ; Kulikov, A. ; Kurbatov, V. ; Lang, N. ; Macharashvili, G. ; Mersmann, T. ; Merzliakov, S. ; Mikirtytchiants, S. ; Mussgiller, A.FZJ* ; Prasuhn, D.FZJ* ; Rathmann, F.FZJ* ; Schleichert, R.FZJ* ; Ströher, H.FZJ* ; Uzikov, Y. ; Wilkin, C. ; Yaschenko, S.

2006
North-Holland Publ. Amsterdam

Physics letters / B 635, 270 - 274 (2006) [10.1016/j.physletb.2006.03.012]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10609 doi:10.1016/j.physletb.2006.03.012

Abstract: The pp -> pp pi(0) differential cross section has been measured with the ANKE spectrometer at COSY-Julich for pion cms angles between 0 degrees and 15.4 degrees at a proton beam energy of 0.8 GeV. The selection of diproton pairs with an excitation energy E-pp < 3 MeV ensures that the final pp system is dominantly in the spin-singlet S-1(0) state. The kinematics are therefore very similar to those of pp -> d pi(+) but with different spin and isospin transitions. The cross sections are over two orders of magnitude smaller than those of pp -> d pi(+) and show a forward dip that is even stronger than that seen at lower energies. The results should provide a crucial extra test of pion production models in nucleon-nucleon collisions. (c) 2006 Elsevier B.V. All rights reserved.

Keyword(s): p p: inelastic scattering ; pi0: hadroproduction ; differential cross section: energy dependence ; differential cross section: dip ; spin: singlet ; magnetic spectrometer: experimental results ; Juelich COSY PS ; p p --> 2p pi0 ; 0.8 GeV ; nuclear reactions H-1(p, pp),pi(0) (auto) ; E=0.8 GeV (auto) ; measured sigma(E,theta) (auto)