Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-08-02
J.Math.Phys.49:033515,2008
Physics
High Energy Physics
High Energy Physics - Theory
23 pages, LaTeX. v2: More material added. v3: Reference added. v4: Grant number added. v5: Minor changes. v6: Stylistic change
Scientific paper
10.1063/1.2835485
We consider the possibility of adding a Grassmann-odd function \nu to the odd Laplacian. Requiring the total \Delta operator to be nilpotent leads to a differential condition for \nu, which is integrable. It turns out that the odd function \nu is not an independent geometric object, but is instead completely specified by the antisymplectic structure E and the density \rho. The main impact of introducing the \nu term is that it makes compatibility relations between E and \rho obsolete. We give a geometric interpretation of \nu as (minus 1/8 times) the odd scalar curvature of an arbitrary antisymplectic, torsion-free and \rho-compatible connection. We show that the total \Delta operator is a \rho-dressed version of Khudaverdian's \Delta_E operator, which takes semidensities to semidensities. We also show that the construction generalizes to the situation where \rho is replaced by a non-flat line bundle connection F. This generalization is implemented by breaking the nilpotency of \Delta with an arbitrary Grassmann-even second-order operator source.
Batalin Igor A.
Bering Klaus
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