Large-angle proton-proton elastic scattering at 201 and 400 GeV/c

Journal Article · Thu Jan 01 04:00:00 EST 1981 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.23.33· OSTI ID:6732567

Faissler, W; Gettner, M; Johnson, J R; Kephart, T; Pothier, E; Potter, D; Tautz, M; Conetti, S; Hojvat, C; Ryan, d G; Shahbazian, K; Stairs, D G; Trischuk, J; Baranov, P; Hartmann, J L; Orear, J; Rusakov, S; Vrieslander, J

Proton-proton elastic scattering using 201- and 400-GeV/c extracted beams at Fermilab has been measured in the region 4.9<-t<14.4 GeV/sup 2/. Contrary to predictions of diffraction models, there is no sign of a second dip or ''break,'' and the slope A in the fit exp(At) is smaller than predicted. It drops from 1.5 to 0.8 GeV/sup -2/ over our t range. The shape of the t distribution can be fitted by the power law dsigma/dtproportionalt/sup -8.4/ which is close to a quantum-chromodynamics (QCD) prediction of t/sup -8/. At fixed t the 201-GeV/c cross sections are about 2.3 times those at 400 GeV/c which is compatible with the QCD and constituent-interchange-model prediction that dsigma/dtproportionals/sup -10/ at fixed t/s.

• Research Organization: Northeastern University, Boston, Massachusetts 02115
• OSTI ID: 6732567
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 23:1; ISSN PRVDA
• Country of Publication: United States
• Language: English

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