Measurement of the total hadronic cross section in tagged reactions

H. Aihara, M. Alston-Garnjost, R. E. Avery, A. R. Barker, D. A. Bauer, A. Bay, R. Belcinski, H. H. Bingham, E. D. Bloom, C. D. Buchanan, 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. EastmanP. H. Eberhard, T. K. Edberg, A. M. Eisner, F. C. Erne, K. H. Fairfield, A. Fridman, G. Godfrey, J. M. Hauptman, C. Ho, W. Hofmann, T. Kamae, R. W. Kenney, S. Khacheryan, R. R. Kofler, D. J. Lambert, W. G.J. Langeveld, J. G. Layter, W. T. Lin, F. L. Linde, S. C. Loken, A. Lu, G. R. Lynch, J. E. Lys, R. J. Madaras, B. D. Magnuson, H. Marsiske, G. E. Masek, L. G. Mathis, S. J. Maxfield, R. R. McNeil, E. S. Miller, N. A. Nicol, D. R. Nygren, P. J. Oddone, H. Oh, Y. T. Oyang, H. P. Paar, A. P.T. Palounek, 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, G. J. Vandalen, R. Van Tyen, W. Vernon, W. Wagner, E. M. Wang, Y. X. Wang, W. A. Wenzel, Z. R. Wolf, H. Yamamoto, S. J. Yellin, G. P. Yost, G. Zapalac, C. Zeitlin

研究成果: 雜誌貢獻期刊論文同行評審

44 引文 斯高帕斯(Scopus)

摘要

We present a measurement of the total cross section for hadrons, with one photon quasireal and the other a spacelike photon of mass squared -Q2. Results are presented as a function of Q2 and the center-of-mass energy W, with the Q2 range extending from 0.2 to 60 GeV2, and W in the range from 2 to 10 GeV. The data were taken with the TPC/Two-Gamma facility at the SLAC e+e- storage ring PEP, which was operated at a beam energy of 14.5 GeV. The cross section exhibits a gentle falloff with increasing W. Its Q2 dependence is shown to be well described by an incoherent sum of vector-meson and pointlike scattering over most of the observed W range. Agreement at high Q2 is improved if a minimum-pT cutoff (motivated by QCD) is imposed on the pointlike contribution.

原文???core.languages.en_GB???
頁(從 - 到)2667-2674
頁數8
期刊Physical Review D - Particles, Fields, Gravitation and Cosmology
41
發行號9
DOIs
出版狀態已出版 - 1990

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