Production of K+K- pairs in proton-proton collisions at 2.83 GeV
Differential and total cross sections for the pp→ppK+K- reaction have been measured at a proton beam energy of 2.83 GeV using the COSY-ANKE magnetic spectrometer. Detailed model descriptions fitted to a variety of one-dimensional distributions permit the separation of the pp→ppφ cross section from that of non-φ production. The differential spectra show that higher partial waves represent the majority of the pp→ppφ total cross section at an excess energy of 76 MeV, whose energy dependence would then seem to require some s-wave φp enhancement near threshold. The non-φ data can be described in terms of the combined effects of two-body final state interactions using the same effective scattering parameters determined from lower energy data.
Ye, QJ; Hartmann, M; Maeda, Y; Barsov, S; Büscher, M; Chiladze, D; Dymov, S; Dzyuba, A; Gao, H; Gebel, R; Hejny, V; Kacharava, A; Keshelashvili, I; Kiselev, YT; Khoukaz, A; Koptev, VP; Kulessa, P; Kulikov, A; Lorentz, B; Mersmann, T; Merzliakov, S; Mikirtytchiants, S; Nekipelov, M; Ohm, H; Paryev, EY; Polyanskiy, A; Serdyuk, V; Stein, HJ; Ströher, H; Trusov, S; Valdau, Y; Wilkin, C; Wüstner, P
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