Inclusive ϱ0 production in γp interactions at 2.8, 4.7, and 9.3 GeV |
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| Authors: | E Kogan J Ballam GB Chadwick KC Moffeit P Seyboth IO Skillicorn H Spitzer G Wolf HH Bingham WB Fretter WJ Podolsky MS Rabin AH Rosenfeld G Smadja Y Eisenberg |
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| Institution: | Stanford Linear Accelerator Center, Stanford University, Stanford, California 9435, USA;University of California and Lawrence Berkeley Laboratory, Berkeley, California 94720, USA;Department of Nuclear Physics, Weizmann Institute of Science, Rehovot, Israel |
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| Abstract: | Inclusive ?0 production in γp → ?0 + anything is studied at 2.8, 4.7, and 9.3 GeV, using the SLAC linearly polarized backscattered laser photon beam and the 82 inch hydrogen bubble chamber. Over this energy range the inclusive inelastic ?0 cross section rises from 6.0 μb to 20.5 μb. The multiplicity, i.e. the average number of μ0 mesons per inelastic hadronic event, has an energy dependence consistent with 1n s.The inclusive cross section is studied as a function of Feynman x, c.m. rapidity, and pT2 variables, and is also broken down into exclusive channels. At 9.3 GeV a forward inelastic peak is observed in the x distribution, containing mainly polarized ?0 mesons. The cross section for this inealastic diffractive component is 2.7 ± 0.6 μb. The pT2 distributions are exponential with a slope of 3 ? 4 (GeV/c)?2, similar to that found in inclusive ?0 production in pp and μp reactions. |
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