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Completing R4 using O(d, d)
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DOI：10.1007/JHEP08(2022)187.png)
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Abstract
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The tree-level string effective action is known to contain quartic Riemann terms with coefficient zeta(3)alpha '(3). In the case of the type II string this is the first alpha ' correction. We use the requirement that the action reduced on a d-torus should have an O(d, d) symmetry to find the B-field couplings up to fifth order in fields. The answer turns out to have a surprisingly intricate structure.
Keywords:
Bosonic Strings
String Duality
Superstrings and Heterotic Strings
Journal
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5.5
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3.9W
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13.7W