Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 2, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP02(2015)079
Keywords
Superstrings and Heterotic Strings; Supergravity Models; Global Symmetries; String Duality
Categories
Funding
- DFG Heisenberg fellowship
- DAE [12-RD-HRI-5.02-0303]
- Department of Science and Technology, India
- U.S. Department of Energy (DoE) [DE-FG02-05ER41360]
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The dimensional reduction of heterotic supergravity with gauge fields truncated to the Cartan subalgebra exhibits a continuous O (d, d + 16; R) global symmetry, related to the O (d, d + 16; Z) T-duality of heterotic strings on a d-torus. The O (d, d + 16; R) symmetry is not present, however, if the supergravity reduction is done including the full set of E-8 x E-8 or SO (32) gauge fields. We analyze which duality symmetries are realized to all orders in alpha' in the proper effective field theories for the massless string states. We find a universal O (d, d; R) symmetry, also predicted by double field theory. We confirm this by giving a novel formulation of the dimensionally reduced supergravity in terms of O (d, d) multiplets, and we discuss cases of symmetry enhancement.
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