Nuclear EMC effect in a statistical model

A simple statistical model in terms of light-front kinematic variables is used to explain the nuclear EMC effect in the range x is an element of [0.2, 0.7], which was constructed by us previously to calculate the parton distribution functions (PDFs) of the nucleon. Here, we treat the temperature T as a parameter of the atomic number A, and get reasonable results in agreement with the experimental data. Our results show that the larger A, the lower T thus the bigger Volume V, and these features are consistent with other models. Moreover. we give the predictions of the quark distribution ratios, i.e., q(A)(x)/q(D)(x), (q) over bar (A)(x)/(q) over bar (D)(x), and s(A)(x)/s(D)(x), and also the gluon ratio g(A)(x)/g(D)(X) for iron as an example. The predictions are different from those by other models, thus experiments aiming at measuring the parton ratios of anti-quarks. strange quarks, and gluons can provide a discrimination of different models. (C) 2009 Elsevier B.V. All rights reserved,Physics, NuclearSCI(E)10ARTICLE3-4390-40082