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    Soft π −p and pp elastic scattering in the energy range 30 to 345 GeV (English)

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    In: Nuclear Physics B ; 217 , 2 ; 285-335  ; 1982
    • ISSN:
      0550-3213
    • Article (Journal)  /  Electronic Resource

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    Abstract Differential cross sections for π −p and pp elastic scattering have been measured at incident momenta ranging from 30 to 345 GeV and in the t range 0.002 (GeV/c)2 ⩽ |t| ⩽ 0.04 (GeV/c)2. From the analysis of the data, the ratio ϱ (t = 0) of the real to the imaginary parts of the forward scattering amplitude was determined together with the logarithmic slope b of the diffraction cone. The results on the real parts confirm the validity of the forward dispersion relations at high energies. Using the dispersion relations, it was shown that the experimental data on ϱ π−p(t = 0) require a continuous rise of the total πp cross sections, at least up to the energy of 2000 GeV, thus revealing a close similarity in high-energy behaviour of πp and pp interactions. The results on the slope parameters from this experiment together with the analysis of the available world data demonstrate that the existing experimental data are consistent with the hypothesis of a universal shrinkage of the hadronic diffraction cone at high energies. The value of the asymptotic shrinkage parameter α p ′ was found to be independent of the kind of the incident hadron and of the momentum transfer in the t range |t| ⩽ 0.2 (GeV/c)2 : 2α p′ = ± 3 (GeV/c)−2.

    Table of contents – Volume 217, Issue 2

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    285
    Soft π −p and pp elastic scattering in the energy range 30 to 345 GeV
    Burq, J.P. / Chemarin, M. / Chevallier, M. / Denisov, A.S. / Doré, C. / Ekelöf, T. / Fay, J. / Grafström, P. / Gustafsson, L. / Hagberg, E. et al. | 1982
    336
    Gauge fields, BRS symmetry and the Casimir effect
    Anbjørn, Jan / Hughes, Richard J. et al. | 1982
    349
    Supersymmetry at finite temperature
    Clark, T.E. / Love, S.T. et al. | 1982
    366
    Supergravity generates hierarchies
    Nilles, H.P. et al. | 1982
    381
    Short-distance perturbation theory for the leading logarithm models
    Adler, Stephen L. et al. | 1982
    395
    Fermionic strings with boundary terms
    Di Vecchia, P. / Durhuus, B. / Olesen, P. / Petersen, J.L. et al. | 1982
    413
    The quantum kinks of two-dimensional theories of the φ 4 type
    Marino, E.C. et al. | 1983
    430
    Superspace, dimensional reduction, and stochastic quantization
    McClain, B. / Niemi, A. / Taylor, C. / Wijewardhana, L.C.R. et al. | 1982
    461
    Detection of master fields near factorization
    Carlson, J. / Halpern, M.B. / Greensite, J. / Sterling, T. et al. | 1982
    465
    Petrov classification of supergravity
    Pilot, Ch. et al. | 1982
    489
    Conformal supergravity in ten dimensions
    Bergshoeff, E. / De Roo, M. / De Wit, B. et al. | 1982
    531
    From N = 1 to N = 4 extended supersymmetric Yang-Mills fields in a covariant Wess-Zumino gauge
    Flume, R. et al. | 1982
    544
    Author index
    | 1983

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