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arXiv · 1807.11432

The Decoupling of $\bar\Omega$ in String Theory

K. S. Narain·A. Zein Assi
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Abstract

In this note, we study the deformation of the topological string by $\bar\Omega$. Namely, adopting the perturbative string amplitudes approach, we identify the $\bar\Omega$-deformation in terms of a physical state in the sting spectrum. We calculate the topological amplitudes $F_g$ in heterotic string theory in the presence of the latter. In particular, we show that it is crucial to include quadratic terms in the effective action in order for $\bar\Omega$ to decouple. It turns out that this decoupling happens at the full string level, suggesting that this holds non-perturbatively.

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K. S. Narain, A. Zein Assi. 2018-07-30. The Decoupling of $\bar\Omega$ in String Theory. https://arxiv.org/abs/1807.11432

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