Nuclear structure functions in the large-x large-Q{sup 2} kinematic region in neutrino deep inelastic scattering

Data from the CCFR E770 neutrino deep inelastic scattering experiment at Fermilab contain events with a large Bjorken x (x>0.7) and high momentum transfer [Q{sup 2}>50 (GeV/c){sup 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. The 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{sub 2}{proportional_to}e{sup -s(x-x{sub 0})} at large x, predicted by ''multi-quark clusters'' and ''few-nucleon correlations,'' can describe the data. A value of s=8.3{+-}0.7(stat){+-}0.7(syst) yields the best agreement with the data. (c) 2000 The American Physical Society.