Experimental Data on Inclusive Cross Section for Cumulative Production of Pions, Kaons, Antiprotons and the Quark-Parton Structure Function of Nuclei

摘要

The paper is a complete presentation of the experimental data on backward pi exp +- , K exp +- and anti p production in pA and dA reactions. The energy and angular dependences of the cross sections are also given in terms of X (generalization of the scaling variable) and psub(perpendicular)sup(2). The X dependence of the cross sections is interpreted in terms of the universal quark-parton structure function of the nucleus G(X). The region X > 1 corresponds to cumulative effect where the nuclear structure functions are considered as independent (irreducible to one-nucleon) objects of hadron physics. The longitudinal distribution of quarks in nuclei G(X) was found to be, to within errors, identical for all the nuclei: G(X) infinity exp(-X/0.14). In the present paper it was studied in the range 0.25 <= X <= 3.4, where the cumulative production cross section varies by 9 orders of magnitude. For large A and X > 1 the dependences reach the asymptotic region sigma approximately A exp 1 . (Atomindex citation 14:757343)