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Effective action of bosonic string theory at order α'²

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arxiv 1907.06500 v3 pith:E27F42PK submitted 2019-07-15 hep-th

Effective action of bosonic string theory at order α'²

classification hep-th
keywords couplingsalphabeenorderstringtheoryactionbosonic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Recently, it has been shown that the gauge invariance requires the minimum number of independent couplings for $B$-field, metric and dilaton at order $\alpha'^2$ to be 60. In this paper we fix the corresponding 60 parameters in string theory by requiring the couplings to be invariant under the global T-duality transformations. The Riemann cubed terms are exactly the same as the couplings that have been found by the S-matrix calculations.

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Cited by 1 Pith paper

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  1. $\alpha'$-Bootstrap

    hep-th 2026-07 conditional novelty 6.5

    An infinite-dimensional algebraic structure on a megaspace yields recursive, T-duality-covariant NS-NS α' and α'^{2} corrections matching known bosonic and heterotic results up to field redefinitions.