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. DerbyJ. 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, Sung Keun 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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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
Issue number9
Publication statusPublished - 1989 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Aihara, H., Alston-Garnjost, M., Avery, R. E., Barbaro-Galtieri, A., Barker, A. R., Barnett, B. A., Bauer, D. A., Bay, A., Bobbink, G. J., Buchanan, C. D., Buijs, A., Caldwell, D. O., Chao, H. Y., Chun, S. B., Clark, A. R., Cowan, G. D., Crane, D. A., Dahl, O. I., Daoudi, M., ... Zeitlin, C. (1989). Exclusive production of pp+- in photon-photon collisions. Physical Review D, 40(9), 2772-2776. https://doi.org/10.1103/PhysRevD.40.2772