Doubled α′-geometry

Olaf Hohm

doi:10.1007/JHEP02(2014)065

Doubled α′-geometry

2014-02-17

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DOI：10.1007/JHEP02(2014)065

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Abstract

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We develop doubled-coordinate field theory to determine the alpha' corrections to the massless sector of oriented bosonic closed string theory. Our key tool is a string current algebra of free left-handed bosons that makes O(D, D) T-duality manifest. While T-dualities are unchanged, diffeomorphisms and b-field gauge transformations receive corrections, with a gauge algebra given by an alpha'-deformation of the duality-covariantized Courant bracket. The action is cubic in a double metric field, an unconstrained extension of the generalized metric that encodes the gravitational fields. Our approach provides a consistent truncation of string theory to massless fields with corrections that close at finite order in alpha'.

Keywords:

Gauge Symmetry

Bosonic Strings

Conformal Field Models in String Theory

String Duality

Doubled α′-geometry

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