Precision measurements of antiproton-proton forward elastic scattering parameters in the 3.7 to 6.2 GeV/c region

T. A. Armstrong*, D. Bettoni, V. Bharadwaj, C. Biino, G. Blanford, G. Borreani, D. Broemmelsiek, A. Buzzo, R. Calabrese, A. Ceccucci, R. Cester, M. Church, P. Dalpiaz, P. F. Dalpiaz, R. Dibenedetto, D. Dimitroyannis, M. Fabbri, J. Fast, A. Gianoli, C. M. GinsburgK. Gollwitzer, G. Govi, A. Hahn, M. A. Hasan, S. Hsueh, R. Lewis, E. Luppi, M. Macrí, A. M. Majewska, M. Mandelkern, F. Marchetto, M. Marinelli, J. Marques, W. Marsh, M. Martini, M. Masuzawa, E. Menichetti, A. Migliori, R. Mussa, S. Palestini, M. Pallavicini, S. Passagio, N. Pastrone, C. Patrignani, T. K. Pedlar, J. Peoples, L. Pesando, F. Petrucci, M. G. Pia, S. Pordes, P. A. Rapidis, R. Ray, J. Reid, G. Rinaudo, E. Robutti, B. Roccuzzo, J. Rosen, A. Santroni, M. Sarmiento, M. Savrié, J. Schultz, K. K. Seth, A. Smith, G. A. Smith, M. Sozzi, S. Trokenheim, M. F. Weber, S. Werkema, Y. Zhang, J. Zhao, G. Zioulas

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Differential cross sections for p̄p elastic scattering have been measured for very small momentum transfers at six different incident antiproton momenta in the range 3.7 to 6.2 GeV/c by the detection of recoil protons at scattering angles close to 90°. Forward scattering parameters σT, b, and ρ have been determined. For the p-parameter, up to an order of magnitude higher level of precision has been achieved compared to that in earlier experiments. It is found that existing dispersion theory predictions are in disagreement with our results for the p-parameter.

Original languageEnglish (US)
Pages (from-to)479-486
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume385
Issue number1-4
DOIs
StatePublished - Sep 26 1996

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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