Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-10-07
Nucl.Phys.B827:545-564,2010
Physics
High Energy Physics
High Energy Physics - Theory
V2: reference added, version to appear in Nucl. Phys. B
Scientific paper
10.1016/j.nuclphysb.2009.11.001
We study general two-dimensional sigma-models which do not possess manifest Lorentz invariance. We show how demanding that Lorentz invariance is recovered as an emergent on-shell symmetry constrains these sigma-models. The resulting actions have an underlying group-theoretic structure and resemble Poisson-Lie T-duality invariant actions. We consider the one-loop renormalization of these models and show that the quantum Lorentz anomaly is absent. We calculate the running of the couplings in general and show, with certain non-trivial examples, that this agrees with that of the T-dual models obtained classically from the duality invariant action. Hence, in these cases solving constraints before and after quantization are commuting operations.
Sfetsos Konstadinos
Siampos Konstadinos
Thompson Daniel C.
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