Evidence for higher twist effects in fast π- production by antineutrinos in neon

Evidence for a significant higher twist contribution to highz π− production in antineutrino scattering is presented. In events withW>3 GeV andQ2>1 GeV2 in our data, it accounts for (51 ±8)% of all π− withz above 0.5. It is consistent with thez−Q2 correlations of Berger's higher twist prediction. The data are inconclusive concerning the predictedy−z correlation andp T dependence. Thez −Q2 correlation is not adequately described by the Lund Monte-Carlo.