  In R-parity-violating supersymmetric models (with a conserved baryon number),
there are no quantum numbers that distinguish the lepton-doublet and down-type
Higgs supermultiplets. As a result, the R-parity-violating parameters depend on
the basis choice for these superfields, although physical observables are
independent of the choice of basis. This paper presents a basis-independent
computation of the sneutrino/antisneutrino squared-mass splitting in terms of
basis-independent quantities. Techniques are developed for an arbitrary number
of sneutrino generations; specific results are provided for the one, two and
three generation cases.
