Nuclear structure functions in the large- x large- Q2 kinematic region in neutrino deep inelastic scattering

Le résumé fourni par la source

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 $[{Q}^{2}>50 (\mathrm{GeV}{/c)}^{2}].$ 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. 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 ${F}_{2}\ensuremath{\propto}{e}^{\ensuremath{-}s(x\ensuremath{-}{x}_{0})}$ at large x, predicted by ``multi-quark clusters'' and ``few-nucleon correlations,'' can describe the data. A value of $s=8.3\ifmmode\pm\else\textpm\fi{}0.7(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.7(\mathrm{syst})$ yields the best agreement with the data.

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