Tensionless Strings and Killing(-Yano) Tensors

TL;DR

This paper develops invariants for tensionless strings in specific backgrounds using their relation to point particles, with applications to Minkowski and Kerr-Newman spacetimes.

Contribution

It introduces a method to construct invariants for tensionless strings in backgrounds with Killing and Killing-Yano tensors, extending the understanding of their symmetries.

Findings

Constructed invariants for tensionless strings in Minkowski and Kerr-Newman backgrounds.

Linked tensionless strings to point particles to facilitate invariant construction.

Enhanced understanding of string symmetries in complex spacetime geometries.

Abstract

We construct invariants for bosonic and spinning tensionless (null) strings in backgrounds that carry Killing tensors or Killing-Yano tensors of mixed type. This is facilitated by the close relation of these strings to point particles. We apply the construction to the Minkowski and to the Kerr-Newman backgrounds.