New Vector Field and BRST Charges in 2-form Einstein Gravity
A. Nakamichi, T. Ueno
Abstract
A new vector field is introduced into 2-form Einstein gravity in four dimensions to restore a large symmetry of its topological version. Two different expressions for the BRST charge are given in the system: one of them associated with a set of irreducible symmetries and the other with a set of on-shell reducible symmetries.
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