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Effective action of bosonic string theory at order $ \alpha'^2 $

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

classification hep-th
keywords couplingsalphabeenorderstringtheoryactionbosonic
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

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 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. $\alpha'$-Bootstrap

    hep-th 2026-07 conditional novelty 6.5 of 10

    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.

  2. Tachyon couplings from S-matrix elements in bosonic string theory

    hep-th 2026-08 conditional novelty 6.0 of 10

    The paper argues that bosonic string effective actions contain only even numbers of tachyon fields and extracts D-brane tachyon couplings that match type 0 theory.

  3. Exploring types I and IIA effective actions through T-duality

    hep-th 2024-12 conditional novelty 5.0 of 10

    T-duality between type I on S^1 and type I' on S^1/Z2 determines all leading two-derivative couplings in the untwisted sectors, reproducing standard type I and type IIA actions except the IIA Chern-Simons term.

  4. T-duality constraint on R-R couplings

    hep-th 2019-08 conditional novelty 5.0 of 10

    T-duality invariance forces the nine Ramond-Ramond coupling constants in the leading-order effective action to be equal, yielding the democratic form of type II supergravity.

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