Correlations of two protons in relativisticdp-collisions

Abstract

Two-proton correlations in the dp--+ppn collisions of relativistic deuterons with protons are considered. These correlations give more information than inclusive proton spectra described in the framework of different deuteron structure function models because of uncertainty in the calculation of secondary interaction contribution (rescattering processes and final state interactions). We present the predictable calculations which show different behaviour of the correlation function for different deuteron structure function models in the kinematic region where contributions of secondary interactions are negligible. PACS: 12.35.Ht; 25.45.De; 17.35.Cs experimental data [6]. An important element of this model is the nucleon momentum distribution G(x,k• inside the deuteron, which defines the probability of finding in relativistic deuteron the nucleon with transverse momentum ka and the fraction x of the deuteron longitudinal momentum. In order to use this reaction for extracting the nucleon momentum distribution in the deuteron one needs correct calculations of secondary interactions (SI) like rescattering, final state interaction [9] etc. Unfortunately, due to an ambiguity of the SI calculations [9][10][11][12] one can use three main variants of the deuteron structure functions ( Fig. 1): i) the phenomenological structure function by Blankenbecler and Schmidt [8]; ii) the structure function obtained from the deuteron nonrelativistic wave function (e.g. for the Paris potential [13]); iii) the

Antiproton production in pp, dp and dd collisions close to threshold

“…(5) - (8) in [13] in line with refs. [16,25]. The result for the Lorentz invariantp cross section in this case is also shown in Fig.…”