Search for resonant nu production at square root s= 183 to 208 GeV

Searches for resonant nu production in e/sup +/e/sup -/ collisions under the assumption that R-parity is not conserved and that the dominant R-parity violating coupling is lambda /sub 121/or lambda /sub 131/ used data recorded by DELPHI in 1997 to 2000 at centre-of-mass energies of 183 to 208 GeV. No deviation from the standard model was observed. Upper limits are given for the lambda /sub lambda 121/ and lambda /sub 131/ couplings as a function of the sneutrino mass and total width. The limits are especially stringent for sneutrino masses equal to the centre-of-mass energies with the highest integrated luminosities recorded.