Exclusive production of pp+- in photon-photon collisions

  • H. Aihara
  • , M. Alston-Garnjost
  • , R. E. Avery
  • , A. Barbaro-Galtieri
  • , A. R. Barker
  • , B. A. Barnett
  • , D. A. Bauer
  • , A. Bay
  • , G. J. Bobbink
  • , C. D. Buchanan
  • , A. Buijs
  • , D. O. Caldwell
  • , H. Y. Chao
  • , S. B. Chun
  • , A. R. Clark
  • , G. D. Cowan
  • , D. A. Crane
  • , O. I. Dahl
  • , M. Daoudi
  • , K. A. Derby
  • J. J. Eastman, P. H. Eberhard, T. K. Edberg, A. M. Eisner, F. C. Erné, K. H. Fairfield, J. M. Hauptman, W. Hofmann, J. Hylen, T. Kamae, H. S. Kaye, R. W. Kenney, S. Khacheryan, R. R. Kofler, W. G.J. Langeveld, J. G. Layter, W. T. Lin, F. L. Linde, S. C. Loken, G. R. Lynch, R. J. Madaras, B. D. Magnuson, G. E. Masek, L. G. Mathis, J. A.J. Matthews, S. J. Maxfield, E. S. Miller, W. Moses, D. R. Nygren, P. J. Oddone, H. P. Paar, S. K. Park, D. E. Pellett, M. Pripstein, M. T. Ronan, R. R. Ross, F. R. Rouse, K. A. Schwitkis, J. C. Sens, G. Shapiro, B. C. Shen, J. R. Smith, J. S. Steinman, R. W. Stephens, M. L. Stevenson, D. H. Stork, M. G. Strauss, M. K. Sullivan, T. Takahashi, S. Toutounchi, R. Van Tyen, W. Vernon, W. Wagner, E. M. Wang, Y. X. Wang, W. A. Wenzel, Z. R. Wolf, H. Yamamoto, S. J. Yellin, C. Zeitlin

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7 Scopus citations

Abstract

We report a measurement of the e+e-e+e-pp+- process with the TPC/Two-Gamma facility at the PEP e+e- storage ring at SLAC. Forty-five pp+- events were identified in data corresponding to an integrated e+e- luminosity of 142 pb-1. The cross section for pp+- is given both as a function of the center-of-mass energy W, with W between 2.5 and 5.5 GeV, and as a function of the in variant mass squared q2 of one of the photons, with -q2<7 GeV2. This cross section falls much less rapidly with W than does the cross section for a similar process, pp. No 00 production is observed, and only a small fraction of the events at low W is consistent with ++- , ++p-, or - p+. In an expanded search through the same data, four events compatible with either (p-) or 0(0) production were found.

Original languageEnglish
Pages (from-to)2772-2776
Number of pages5
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume40
Issue number9
DOIs
StatePublished - 1989

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