Comparison of 20 exclusive reactions at large t

C. White, R. Appel, D. S. Barton, G. Bunce, A. S. Carroll, H. Courant, G. Fang, S. Gushue, K. J. Heller, Steven Heppelmann, K. Johns, M. Kmit, D. I. Lowenstein, X. Ma, Y. I. Makdisi, M. L. Marshak, J. J. Russell, M. Shupe

Research output: Contribution to journalArticle

76 Citations (Scopus)

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 languageEnglish (US)
Pages (from-to)58-78
Number of pages21
JournalPhysical Review D
Volume49
Issue number1
DOIs
StatePublished - Jan 1 1994

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cross sections
quarks
scaling
scattering
center of mass
diagrams
momentum
energy
sensitivity
hydrogen

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

White, C., Appel, R., Barton, D. S., Bunce, G., Carroll, A. S., Courant, H., ... Shupe, M. (1994). Comparison of 20 exclusive reactions at large t. Physical Review D, 49(1), 58-78. https://doi.org/10.1103/PhysRevD.49.58
White, C. ; Appel, R. ; Barton, D. S. ; Bunce, G. ; Carroll, A. S. ; Courant, H. ; Fang, G. ; Gushue, S. ; Heller, K. J. ; Heppelmann, Steven ; Johns, K. ; Kmit, M. ; Lowenstein, D. I. ; Ma, X. ; Makdisi, Y. I. ; Marshak, M. L. ; Russell, J. J. ; Shupe, M. / Comparison of 20 exclusive reactions at large t. In: Physical Review D. 1994 ; Vol. 49, No. 1. pp. 58-78.
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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.",
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White, C, Appel, R, Barton, DS, Bunce, G, Carroll, AS, Courant, H, Fang, G, Gushue, S, Heller, KJ, Heppelmann, S, Johns, K, Kmit, M, Lowenstein, DI, Ma, X, Makdisi, YI, Marshak, ML, Russell, JJ & Shupe, M 1994, 'Comparison of 20 exclusive reactions at large t', Physical Review D, vol. 49, no. 1, pp. 58-78. https://doi.org/10.1103/PhysRevD.49.58

Comparison of 20 exclusive reactions at large t. / White, C.; Appel, R.; Barton, D. S.; Bunce, G.; Carroll, A. S.; Courant, H.; Fang, G.; Gushue, S.; Heller, K. J.; Heppelmann, Steven; Johns, K.; Kmit, M.; Lowenstein, D. I.; Ma, X.; Makdisi, Y. I.; Marshak, M. L.; Russell, J. J.; Shupe, M.

In: Physical Review D, Vol. 49, No. 1, 01.01.1994, p. 58-78.

Research output: Contribution to journalArticle

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T1 - Comparison of 20 exclusive reactions at large t

AU - White, C.

AU - Appel, R.

AU - Barton, D. S.

AU - Bunce, G.

AU - Carroll, A. S.

AU - Courant, H.

AU - Fang, G.

AU - Gushue, S.

AU - Heller, K. J.

AU - Heppelmann, Steven

AU - Johns, K.

AU - Kmit, M.

AU - Lowenstein, D. I.

AU - Ma, X.

AU - Makdisi, Y. I.

AU - Marshak, M. L.

AU - Russell, J. J.

AU - Shupe, M.

PY - 1994/1/1

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N2 - 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.

AB - 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.

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White C, Appel R, Barton DS, Bunce G, Carroll AS, Courant H et al. Comparison of 20 exclusive reactions at large t. Physical Review D. 1994 Jan 1;49(1):58-78. https://doi.org/10.1103/PhysRevD.49.58