MULTIQUARK CLUSTER MODEL AT LARGE BJORKEN SCALING VARIABLE

Nuclear quark distribution functions, obtained in the framework of the multiquark cluster model, show that the Emc effect can be explained b y taking into account the scattering on colourless multiquark configur ations in nuclei. The prediction for the behaviour of the nuclear stru cture function in the kinematical region X > 1, which has not been suf ficiently studied experimentally, is given. The Drell-Yan cross sectio ns for lepton pair production in proton-platinum at 400 GeVc-1 and pio n-tungsten at pion energy 280 GeV interactions were calculated in addi tion to the prediction of the behaviour of cross-section ratios in dif ferent kinematical regions. The predictions show significant nuclear e ffects in these processes.