Overlap formula for the chiral multiplet

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The vacuum overlap formalism is extended to describe the supersymmetric multiplet of a Weyl fermion, a complex scalar boson and an auxiliary field in the case without interaction, based on the fact that supersymmetry can be maintained upto quadratic terms by introducing bosonic species doublers. We also obtain a local action which describes the chiral multiplet and discuss its symmetry structure. It is shown that, besides the manifest supersymmetry, the action possesses a chiral symmetry of the type given by L��scher and analogous bosonic symmetries which may be regarded as independent infinitesimal rotations of complex phases of the scalar and the auxiliary fields. This implies that the $U(1) \times U(1)_R$ symmetry of the chiral multiplet can be exact on the lattice.

16 pages, LaTeX2e, some corrections in the introduction

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