Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2003-05-17
Class.Quant.Grav. 21 (2004) 1051-1078
Physics
High Energy Physics
High Energy Physics - Theory
1+32 pages, no figures. Accepted for publication on Classical and Quantum Gravity. New title and abstract. Some material has b
Scientific paper
10.1088/0264-9381/21/4/022
In spacetimes admitting Yano tensors the classical theory of the spinning particle possesses enhanced worldline supersymmetry. Quantum mechanically generators of extra supersymmetries correspond to operators that in the classical limit commute with the Dirac operator and generate conserved quantities. We show that the result is preserved in the full quantum theory, that is, Yano symmetries are not anomalous. This was known for Yano tensors of rank two, but our main result is to show that it extends to Yano tensors of arbitrary rank. We also describe the conformal Yano equation and show that is invariant under Hodge duality. There is a natural relationship between Yano tensors and supergravity theories. As the simplest possible example, we show that when the spacetime admits a Killing spinor then this generates Yano and conformal Yano tensors. As an application, we construct Yano tensors on maximally symmetric spaces: they are spanned by tensor products of Killing vectors.
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