Resonant sneutrino production at Tevatron run II

We consider the single chargino production at Tevatron p (p) over bar --> (v) over tilde(i) --> <(chi)over tilde>(1) +/- l(i)double dagger as induced by the resonant sneutrino production via a dominant R-parity violating coupling of type chi(ijk)L(i)D(k)(c). Within a supergravity model, we study the three leptons final state. The comparison with the expected background demonstrate that this signature allows to extend the sensitivity on the supersymmetric mass spectrum beyond the present LEP limits and to probe the relevant R-parity violating coupling down to values one order of magnitude smaller than the most stringent low energy indirect bounds. The trilepton signal offers also the opportunity to reconstruct the neutralino mass in a model independent way with good accuracy. (C) 2000 Elsevier Science B.V. All rights reserved.