Nuclear Structure Functions in the Large x Large Q^2 Kinematic Region in Neutrino Deep Inelastic Scattering

Data from the CCFR E770 Neutrino Deep Inelastic Scattering (DIS) experiment at Fermilab contain events with large Bjorken x (x>0.7) and high momentum transfer (Q^2>50 (GeV/c)^2). A comparison of the data with a model based on no nuclear effects at large x, shows a significant excess of events in the data. Addition of Fermi gas motion of the nucleons in the nucleus to the model does not explain the excess. Adding a higher momentum tail due to the formation of ``quasi-deuterons makes some improvement. An exponentially falling F_2 propto e^-s(x-x_0) at large x, predicted by ``multi-quark clusters and ``few-nucleon correlations, can describe the data. A value of s=8.3 pm 0.7(stat.)pm 0.7(sys.) yields the best agreement with the data.