Leading particles and diffraction dissociation in 150-GeV/c π-p interactions

D. Brick*, D. Fong, M. Heller, A. M. Shapiro, M. Widgoff, F. Bruyant, P. Lucas, D. Bogert, M. Johnson, R. Burnstein, C. Fu, D. Petersen, M. Robertson, H. Rubin, R. Sard, A. Snyder, J. Tortora, E. D. Alyea, C. Y. Chien, A. PevsnerR. Zdanis, F. Barriero, O. Benary, J. F. Brau, J. Grunhaus, E. S. Hafen, R. I. Hulsizer, U. Karshon, V. Kistiakowsky, A. Levy, A. Napier, I. A. Pless, J. P. Silvermann, P. C. Trepagnier, J. Wolfson, R. K. Yamamoto, H. Cohn, P. F. Jacques, T. C. Ou, R. J. Plano, T. L. Watts, E. Brucker, E. Koller, P. Stamer, S. Taylor, W. Bugg, G. Condo, T. Handler, E. Hart, H. Kraybill, D. Ljung, T. Ludlam, H. D. Taft

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Diffraction dissociation of both the beam and target particles has been observed in 150-GeV/c π-p interactions in the Fermilab 30-in.-bubble-chamber- proportional-wire-chamber hybrid spectrometer. The dissociations are observed as recoil systems opposite leading particles, the signals of which are separated from background where appropriate by a variant of the Van Hove sector cut, thus allowing the high-mass portion of the spectrum to be observed. Pion dissociation has a cross section of 1758±105 μb, divided among two-, four-, and six-prong events; some ρ0 production is seen and comes primarily from the π-→2π-π+ channel. The proton dissociation cross section is 1726±100 μb, again divided among two-, four-, and six-prong events. The final state contains a neutron more frequently than a proton in the two-and six-prong events, a proton more frequently in the four-prong events. Production of Δ++ is observed in the p→pπ+π- dissociations.

Original languageEnglish
Pages (from-to)1726-1743
Number of pages18
JournalPhysical review D
Volume21
Issue number7
DOIs
Publication statusPublished - 1 Apr 1980

Funding

We wish to thank the staffs of our several institutions for their work in scanning the film and completing two measurement passes. We also wish to thank the Fermilab neutrino section for aid given us during the setup and running periods. One of us (J.E.B.) would like to thank the Fannie and John Hertz Foundation for financial support and another (P.W.L.) the Johns Hopkins University for support during much of this work and Professor W. D. Walker for many helpful discussions. This effort was supported in part by the United States Department of Energy and the National Science Foundation.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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