TY - JOUR
T1 - Experimental study of the reactions pp-+ and K-K+ between 360 and 760 MeV/c
AU - Tanimori, T.
AU - Ishimoto, S.
AU - Nakamura, K.
AU - Tanaka, K. H.
AU - Sudou, M.
AU - Homma, S.
AU - Sugimoto, Y.
AU - Fujii, T.
AU - Fujii, Y.
AU - Kohno, S.
AU - Morita, Y.
AU - Sumi, Y.
PY - 1990
Y1 - 1990
N2 - The folded differential cross sections dd)+dd(-,), where, is the center-of-mass angle of the negatively charged outgoing particle, have been measured for the reactions p»p-+ and K-K+ at 15 incident beam momenta between 360 and 760 MeV/c with much better statistics than previous experiments. The total cross sections for these reactions, -+ and -+, have also been obtained by integrating the folded differential cross sections. The folded differential cross sections of both reactions show a similar behavior at all measured beam momenta, characterized by a prominent peak at cos=1. The cross section -+ shows a smooth but rapidly decreasing behavior as the beam momentum increases up to 550 MeV/c, whereas -+ shows a smooth and flat momentum dependence. These results are compared with some theoretical calculations based on nonrelativistic quark models. Although the shape of the folded differential cross section of the p»p-+ reaction is rather well reproduced by these models, that of the p»pK-K+ reaction, and, in particular, the prominent peak at cos=1 cannot be explained at all. The information from other experiments indicates that this discrepancy is most pronounced at the backward angles. Moreover, the momentum dependence of both -+ and -+ is not satisfactorily reproduced by these models.
AB - The folded differential cross sections dd)+dd(-,), where, is the center-of-mass angle of the negatively charged outgoing particle, have been measured for the reactions p»p-+ and K-K+ at 15 incident beam momenta between 360 and 760 MeV/c with much better statistics than previous experiments. The total cross sections for these reactions, -+ and -+, have also been obtained by integrating the folded differential cross sections. The folded differential cross sections of both reactions show a similar behavior at all measured beam momenta, characterized by a prominent peak at cos=1. The cross section -+ shows a smooth but rapidly decreasing behavior as the beam momentum increases up to 550 MeV/c, whereas -+ shows a smooth and flat momentum dependence. These results are compared with some theoretical calculations based on nonrelativistic quark models. Although the shape of the folded differential cross section of the p»p-+ reaction is rather well reproduced by these models, that of the p»pK-K+ reaction, and, in particular, the prominent peak at cos=1 cannot be explained at all. The information from other experiments indicates that this discrepancy is most pronounced at the backward angles. Moreover, the momentum dependence of both -+ and -+ is not satisfactorily reproduced by these models.
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U2 - 10.1103/PhysRevD.41.744
DO - 10.1103/PhysRevD.41.744
M3 - Article
AN - SCOPUS:24244466548
VL - 41
SP - 744
EP - 764
JO - Physical review D: Particles and fields
JF - Physical review D: Particles and fields
SN - 0556-2821
IS - 3
ER -