Determination of the pattern of nuclear binding
from the data on lepton-nucleus deep inelastic scattering
Joint Institute for Nuclear Research, Dubna, Russia (G.Smirnov@cern.ch)
Received: 28 January 1999 / Revised version: 1 April 1999 / Published online: 3 August 1999
Nucleon structure function ratios measured in the range of atomic masses are analyzed with the aim of determining the pattern of the x and A dependence of F2(x) modifications caused by the nuclear environment. It is found that the x and A dependence of the deviations of the rA(x) from unity can be factorized in the entire range of x. The characteristic feature of the factorization is represented with the three cross-over points xi, i= 1-3 in which rA(x)= 1 independently of A. In the range x > 0.7 the pattern of rA(x) is fixed with .The pattern of the x dependence is compared with theoretical calculations of Burov, Molochkov and Smirnov to demonstrate that the evolution of the nucleon structure as a function of A occurs in two stages: first for and second for A > 4. The long-standing problem of the origin of the EMC effect is understood as a modification of the nucleon structure in the field responsible for the binding forces in a three-nucleon system.