Measurement of np elastic scattering at high energies and very small momentum transfers

Arefiev, A.; Babaev, A.; Bamberger, A.; Brundiers, H.J.; Eliseev, G.P.; Fischer, U.; Friedrich, Daniel; Galaktionov, Yu.; Gorodkov, Yu.; Hartung, R.; Heck, W.; Kamyshkov, Yu.; Lubimov, V.; Maier, Robert R. J.; Plyaskin, V.; Pojidaev, V.; Runge, K.; Schaile, O.; Schevchenko, V.; Thomauske, Bruno; Vlasov, M.K.; Weber, C.

doi:10.1016/0550-3213(84)90034-8

Cited by 12 publications

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References 24 publications

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“…Using a restriction on |t| as in the case of pp scattering (|t| < 0.125 (GeV/c) 2 ) we found only one data set [64] at P lab = 0.924 -1.793 GeV/c containing the necessary points. Since that data set was not sufficient for the fit, we increased the upper limit of |t| to 0.25 (GeV/c) 2 using the data [64] - [71] but were not satisfied by the fit results because they could not allow to determine the momentum dependence of the parameters. Various restrictions on the fit range of t were used in the literature [65,68,66,72,73].…”

Section: Parameterization Of the Np Elastic Scattering Amplitudementioning

confidence: 99%

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Empirical parametrization of the nucleon-nucleon elastic scattering amplitude at high beam momenta for Glauber calculations and Monte Carlo simulations

Uzhinsky¹,

Galoyan²,

Ritman

et al. 2016

Phys. Rev. C

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A parameterization of the nucleon-nucleon elastic scattering amplitude is needed for future experiments with nucleon and nuclear beams in the beam momentum range of 2 -50 GeV/c/nucleon. There are many parameterizations of the amplitude at P lab > 25-50 GeV/c, and at P lab ≤ 5 GeV/c. Our paper is aimed to cover the range between 5 -50 GeV/c.The amplitude is used in Glauber calculations of various cross sections and Monte Carlo simulations of nucleon-nucleon scatterings. Usually, the differential nucleon-nucleon elastic scattering cross sections are described by an exponential expression. Corresponding experimental data on pp interactions at |t| > 0.005 (GeV/c) 2 and |t| ≤ 0.125 (GeV/c) 2 have been fit. We propose formulae to approximate the beam momentum dependence of these parameters in the momentum range considered. The same was done for np interactions at |t| ≤ 0.5 (GeV/c) 2 . Expressions for the momentum dependence of the total and elastic cross sections, and the ratio of real to imaginary parts of the amplitude at zero momentum transfer are also given for pp and np collisions. These results are sufficient for a first approximation of the Glauber calculations. For more exact calculations we fit the data at |t| > 0.005 (GeV/c) 2 without restrictions on the maximum value of |t| using an expression based on two coherent exponential. The parameters of the fits are found for the beam momentum range 2 -50 GeV/c.

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