Neutron-Proton Elastic Scattering from 70 to 400 GeV/c

Abstract

We have measured neutron-proton elastic scattering cross sections for four-momentum transfers .17 ~-t ~ 3.5(Gev/c)2. The logarithmic slope parameter is found to be consistent with existing proton-proton parameterizations. The data also exhibit a dip in the cross section near-t ~ l.4(Gev/c)2 for incident neutron momenta above 200 GeV/c. Differences between n-p and p-p cross sections. 2 are noted in the region .7 ~-t ~ l.4(GeV/c) •

Van der Waals Type Model for Neutron-Proton Elastic Scattering at High Energies

“…Shiohara and Y ano 12 ) tried to improve the same model for obtaining quantitative agreement for differential cross-section data by introducing more parameters, but the new structure as predicted by their model at presently available energies was not consistent with the experimental data. Saleem and Fazal-e-Aleem13l have modified this model and explained the pp differential cross-section results in the domain O<-t:S:12(GeV/c) 2 • In this paper we will show that the Van der Waals type model can also be used to explain the differential cross-section as well as total cross-section data of np elastic scattering as measured by DeHaven et al6), 7) According to Van der Waals type model, differential cross-section for np elastic scattering can be expressed as…”

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

“…Taking into account such uncertainties we have obtained χ 2 /N DF = 4938/979 ∼ 5, which is vastly improved. 2 The worst χ 2 /N DF is observed for the data [70] at P lab ≥ 100 GeV/c. A separate fit of the data gives an acceptable χ 2 /N DF , A 1 and B 1 which deviate from the corresponding approximations in the range by ± 5 %.…”

“…The restricted range of t reflected on the fit results of data [70] at P lab = 100 GeV/c (see Fig. 10f).…”

“…A two exponential fit of Eq. 27 to the data [64,66,67,69,70] using Eq. 28 gives meaningful results only for 22 of 45 sets of data.…”

Neutron-proton differential cross sections in the range 70 to 400 GeV/c

“…We describe here an experiment to measure neutron-proton elastic scattering differential cross sections. A brief report has already been published [1 ]. A more detailed description of the experimental techniques can be found in refs.…”