Abstract
We report a study of 20 exclusive reactions measured at the AGS at 5.9 GeV/c incident momentum, 90° center of mass. This experiment confirms the strong quark flow dependence of two-body hadron-hadron scattering at large angle. At 9.9 GeV/c an upper limit had been set for the ratio of cross sections for (pppp)(pppp) at 90°c.m., with the ratio less than 4%. The present experiment was performed at lower energy to gain sensitivity, but was still within the fixed angle scaling region. A ratio R(pppp)140 was measured at 5.9 GeV/c, 90°c.m. in comparison to a ratio near 1.7 for small angle scattering. In addition, many other reactions were measured, often for the first time at 90°c.m. in the scaling region, using beams of , p, and p on a hydrogen target. There are similar large differences in cross sections for other reactions: R(K-p+-K-p-+)112, for example. The relative magnitudes of the different cross sections are consistent with the dominance of quark interchange in these 90° reactions, and indicate that pure gluon exchange and quark-antiquark annihilation diagrams are much less important. The angular dependence of several elastic cross sections and the energy dependence at a fixed angle of many of the reactions are also presented.
Original language | English (US) |
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Pages (from-to) | 58-78 |
Number of pages | 21 |
Journal | Physical Review D |
Volume | 49 |
Issue number | 1 |
DOIs | |
State | Published - 1994 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
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Comparison of 20 exclusive reactions at large t
White, C. (Creator), Appel, R. (Creator), Barton, D. S. (Creator), Bunce, G. (Creator), Carroll, A. S. (Creator), Courant, H. (Creator), Fang, G. (Creator), Gushue, S. (Creator), Heller, K. J. (Creator), Heppelmann, S. (Creator), Johns, K. A. (Creator), Kmit, M. (Creator), Lowenstein, D. I. (Creator), Ma, X. (Creator), Makdisi, Y. I. (Creator), Marshak, M. L. (Creator), Russell, J. J. (Creator) & Shupe, M. (Creator), HEPData, 1994
DOI: 10.17182/hepdata.50306.v1, https://www.hepdata.net/record/ins377535?version=1
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