Exclusive Neutral Strange Particle Production from Double Pomeron Exchange Produced by Proton-Proton Interactions at SQRT.S = 62 GEV

Data are presented for the first time on exclusive Pomeron-Pomeron interactions which produce a neutral strange and neutral antistrange particle pair in a central system X. In this paper, the system, X , is identified as one of the following neutral combinations; K_sp{s}{0}K _sp{s}{0}, K_sp{s }{0}K^+/-pi^mp , Lambda^0|Lambda ^0, Lambda^0| Lambda^{0*}. These data were obtained in proton-proton collisions at sqrt{s} = 62 GeV at the CERN ISR. The triggering systems used to obtain these data are described, followed by a description of the data. The central system mass distributions are presented along with differential mass cross section estimates. A broad enhancement is seen in the K_sp{s}{0}K_sp {s}{0} system at a mass of 1.2 GeV, and is likely to have the quantum numbers J ^{PC} = 0^{++ }. Total cross section estimates of 1.3 +/-.64 mu b in the K _sp{s}{0}K_sp{s} {0} system,.44 +/-.14 mu b in the K_sp{s }{0}K^+/-pi^mp system,.20 +/-.14 mu b in the Lambda^0 |Lambda^0 system, and.13 +/-.06 mu b in the Lambda^0|Lambda^{0 *} system are obtained.