Gravitation,torsion, and string theory |
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Authors: | Richard T. Hammond |
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Affiliation: | (1) Physics Department, North Dakota State University, 58105 Fargo, North Dakota, USA |
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Abstract: | The low energy effective Lagrangian of string theory presents us with not only gravity, but the dilaton and the antisymmetric field as well. It is shown that a Brans-Dicke generalization of a metric theory of gravity with torsion that is derived as the exterior derivative of a potential is equivalent to the low energy string theory Lagrangian. This gives all of the fields a physical interpretation in four dimensions and provides an indication that the dilaton representssmall corrections to general relativity at large distances. |
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