Production of K+ mesons in the pp and pA interactions at different energies

Abstract

Abstract,In this paper we analyze the experimental data on the production of K + mesons in the pp collisions and propose a method of the unified description of these data in a broad energy range for primary protons. The production of K + mesons in the collisions of protons with nuclei is discussed. PACS: 13.85.-t; 25.40.-h to find optimum expressions, for the comparison with experiment, in a less thoroughly explored intermediate region and, possibly, will also facilitate its interpretation.In the present study we have undertaken an attempt to make such a description of the production of K § mesons in the pp and pA interactions at different energies, In more detail the results given here are outlined in [16].

Production ofK ?-mesons in proton-proton and proton-nucleus interactions at various energies

“…Thus the results obtained show that the simple analytical formulas proposed (which are analogous to those obtained in [22] for K+-mesons) allow one to calculate satisfactorily the inclusive cross sections for the production of K--mesons at small angles on light nuclei by protons of various energies.…”

“…In the case where ~ ~ s and for the Gaussian distribution of the density of nuclear nucleons (p(r) = (bo/rC) ~/2 exp (-bor2)) we approximately have [22] Iv(A)=A(1 -e-~)/xa, x~ = [#(Po) + #(P~-)] bo/2~. (16) Note that in [22] the integral (14) has been calculated also for the nucleus with the uniform nucleon density and for #(p~)=0 it has been reduced to a more simple form.…”

“…For the description of these data it is natural to choose the parametrization of the invariant inclusive cross section EK-davv~K-x/dpK-in the form used by us in [22] for the analogous cross section for the production of K +-mesons, namely:…”

K?-meson production in proton-nucleus collisions

“…In (6) the parameters ai were adjusted to the available experimental data and the functions F~ were taken from [21]. A disadvantage of the fitting procedures (5) and (6) is related to the fact that most of the available experimental data were obtained at rather high energies.…”

Subthreshold K? production in pion-nucleus reactions

“…The parameter which defines the high-momentum part in n(pt) is 0.06 for 12C and is proportional to A 1/3 for other target nuclei. In the case when f~ ~-fa o and in the case of a nucleus with the uniform density of nucleons* of radius R the integral (7) is calculated exactly to be [19] (21) *Calculations show that in the case of the Gaussian distribution of i2 the density of nuclear nucleons for C target nucleus the integral (7) is increased by a factor of 1.5…”