  Assuming neutrinos to be of the Dirac type, the little group generators for
the one-particle states, created off the vacuum by the field operator, are
obtained, both in terms of the one-particle states themselves and in terms of
creation/annihilation operators. It is shown that these generators act also as
rotation operators in the Hilbert space of the states, providing three types of
transformations: a helicity flip, the standard charge conjugation, and a
combination of the two, up to phases. The transformations' properties are
provided in detail and their physical implications discussed. It is also shown
that one of the transformations continues to hold for chiral fields without
mixing them.
