Old Dualities and New Anomalies

Aug 14, 2020
26 pages
Published in:
  • Phys.Rev.D 102 (2020) 12, 126002
  • Published: Dec 2, 2020
e-Print:

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Abstract: (arXiv)
We revisit the question whether the worldsheet theory of a string admits a global O(d,d) symmetry. We consider the truncation of the target space theory in which fields are independent of d coordinates, which is O(d,d,R) invariant. The worldsheet theory is not O(d,d,R) invariant, unless it is truncated by setting winding and center-of-mass momenta to zero. We prove consistency of this truncation and give a manifestly O(d,d,R) invariant action, generalizing a formulation due to Tseytlin by including all external and internal target space fields. It is shown that, due to chiral bosons, this symmetry is anomalous. The anomaly is cancelled by a Green-Schwarz mechanism that utilizes the external B-field.
Note:
  • 42 pages, references added
  • String theory, quantum gravity, gauge/gravity duality
  • anomaly: Green-Schwarz
  • target: internal
  • boson: chiral
  • duality
  • string model
  • torus
  • Hamiltonian formalism
  • Kaluza-Klein
  • O(N,N)