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arXiv 0910.1345hep-th
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Lorentz非不变作用量的重正化和T对偶性

Renormalization of Lorentz non-invariant actions and manifest T-duality

K. Sfetsos, K. Siampos, Daniel C. Thompson

摘要:

我们研究了一般的二维σ模型,它不具有明显的洛伦兹不变性。我们展示了如何要求洛伦兹不变性恢复作为一个新兴的壳对称约束这些西格玛模型。由此产生的行动有一个潜在的群论结构,并类似于泊松李T-对偶不变的行动。我们考虑这些模型的单圈重整化,并表明量子洛伦兹反常是不存在的。我们计算运行的耦合一般,并显示,与某些非平凡的例子,这同意的T-对偶模型从对偶不变的经典行动。因此,在这些情况下,在量化之前和之后求解约束是交换操作。

英文摘要:

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.

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