Construction of the Vacuum String Field Theory on a non-BPS Brane
  In the framework of the Sen conjectures a construction of vacuum superstring field theory on a non-BPS brane is discussed. A distinguished feature of this theory is a presence of a ghost kinetic operator mixing GSO+/- sectors. A candidate for such kinetic operator with zero cohomology is discussed. 
I.Ya. Aref'eva, D.M. Belov, A.A. Giryavets