18 research outputs found
VECTOR MESON PRODUCTION BY POLARIZED PHOTONS AT 2.8, 4.7 AND 9.3 GeV
We present results on vector meson photoproduction via +yp-. Vp in the LBL-SLAC 82 â hydrogen bubble chamber exposed to a linearly polarized photon beam at 2.8, 4.7 and 9.3 GeV. We find p â production to have the characteristics of a diffractive process, i.e., a cross section decreasing slowly with energy and a differential cross section with slope of- 6.5 GeV-2. Within errors the p â production amplitudes are entirely due to natural parity exchange. S-channel helicity is conserved to a high degree in the y--+p â transition. We find evidence for small helicity flip amplitudes for 7rr pairs in the,o â region. Photoproduction of w mesons is separated into its natural (aN) and unnatural (vu) parity ex-change contributions. The E-Y and t-dependence and the spin density matrix of the unnatural parity exchange contribution are consistent with an OPE process. The natural parity exchange part has characteristics similar to p â production
Study of charge-dependent behavior of final-state particles in interactions at 205 GeV/c
TOTAL AND PARTIAL yp CROSS SECTIONS AT 9.3 GeV*
We report yp total, topological, and channel cross sections at 9.3 GeV, from a bubble chamber experiment monoenergetic photon beam. using a nearly * Work supported by the U. S. Atomic Energy Commission and Nationa
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THE pO-w INTERFERENCE PARAMETERS IN DIFFRACTIVE PHOTOPRODUCTION OF VECTOR MESONS ON HYDROGEN
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CHARGE ASYMMETRY IN INELASTIC n- p INTERACTIONS AT 205 GeV/c FOR PARTICLES WITH TRANSVERSE MOMENTUM > 1.0 GeV/e
interactions at 205 GeV/c: multiplicities of charged and neutral particles, production of neutral particles
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SEARCH FOR P0MER0N-P0MER0N-2n EVENTS IN 205 GeV/c n-p INTERACTIONS
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