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O(9,9) symmetry of NS-NS couplings at order α'^3

By Mohammad Garousi
Recently, imposing the O(1,1) symmetry on the circle reduction of the classical effective action of string theory, we have found all NS-NS couplings of type II superstring theories at order \alpha'^3. In this paper we use the cosmological reduction on the couplings and show that, up to field redefinitions and... Show more
May 17, 2021
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$O(9,9)$ symmetry of NS-NS couplings at order $α'^3$
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