Forward charge asymmetry in 20-GeVgammapreactions
Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields1987Vol. 36(1), pp. 1–7
Citations Over TimeTop 15% of 1987 papers
Vivian O’Dell, P. Rankin, G.P. Yost, M. J. Harwin, K. Abe, R. Armenteros, T. C. Bacon, J. Ballam, H. H. Bingham, J. E. Brau, K. Braune, D. Brick, W. Bugg, J. M. Butler, W. Cameron, H.O. Cohn, D.C. Colley, G. T. Condo, S. Dado, R. N. Diamond, P. Dingus, P.J. Dornan, R. Erickson, R. C. Field, B. Franek, N. Fujiwara, T. Glanzman, Ian Godfrey, Jacques Goldberg, A. T. Goshaw, G. Hall, Edwin R. Hancock, T. Handler, H. J. Hargis, E. L. Hart, K. Hasegawa, R. I. Hulsizer, M. Jobes, T. Kafka, J. Kent, G. Kalmus, D. P. Kelsey, T. Kitagaki, A. Levy, Peter W. Lucas, W. A. Mann, R. Merenyi, R. H. Milburn, C. Milsténe, K. C. Moffeit, A. Napier, S. Noguchi, F. Ochiai, S.W. OʼNeale, A. P. T. Palounek, I. A. Pless, W. J. Robertson, H. Sagawa, Takahiro Sato, J. Schneps, S. J. Sewell, J. T. Shank, A. Shapiro, R. Sugahara, Y. Suzuki, Kazumasa Takahashi, K. Tamai, S. Tanaka, S. Tether, D. A. Waide, W. D. Walker, M. Widgoff, Christina Wilkins, S. Wolbers, C. A. Woods, A. Yamaguchi, R. K. Yamamoto, S. Yamashita, Y. Yoshimura, H. Yuta
Abstract
Fast forward particles photoproduced in 20-GeV interactions on a hydrogen target are shown to be preferentially positive, the asymmetry increasing with transverse momentum and Feynman x. Evidence is given that this effect is not due to forward-going target fragments. A model in which production from the photon of a forward-going spectator u is preferred over a \ifmmode \bar{u}\else \={u}\fi{}, due to a higher probability for interactions of antiquarks with the proton constituents, is shown to be qualitatively consistent with the data.
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