Cumulative processes and the quark distributions in nuclei

Hypothesis about existence of multiquark (mainly 12q) bags in nuclei is applied to discuss spectra of cumulative nucleons and mesons produced in collisions of high-energy particles with nuclei. It is shown that the exponential quark momentum distribution in 12q-bag esup(-k/ksub(0)) at k >> k0 ( agreeing well with the data on lepton-nucleus scattering at large q2) results in the almost exponential distribution of cumulative particles over the light-cone variable αsub(B)=(Esub(p)-p cos theta)/msub(N) at psub(perpendicular)=0: f(αsub(B), psub(perpendicular)=0)=Esub(p)(dsup(3)σ/dsup(3)p) approximately esup(-aαsub(B)), where a=msub(N)/2ksub(0)=7-8. Dependence of f(αsub(B), psub(perpendicular)) on psub(perpendicular) is also treated. Yields of cumulative resonances as well as effects resulting from possible differences of u- and d-quark distributions in N > Z nuclei are discussed