A-dependence of the inclusive distributions of the J/psi particles

We measured the differential cross sections dsigma/dx and dsigma/dp/sup 2/t-italic/sub oftheinclusiveproductionofJ//psi particles by ..pi../sup -/ mesons with momentum 43 GeV/c from the nuclei Be, Cu, and W. The dependence of the cross sections on the atomic weight A of the nucleus was approximated by the function A/sup ..cap alpha../. The exponent ..cap alpha.. increases with increasing p/sub t//sup 2/ and is independent of x within the limits of statistical errors.