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Low -energy dynamics of gravitation

Tibor Torma, University of Massachusetts - Amherst

Abstract

The present status of theories of quantum gravity are reviewed from the low energy point of view. String theory relates classical black-hole type solutions of Einstein-like equations (e.g. axidilaton gravity) to the string vacuum. Several such solutions are proposed and their properties are investigated, including their behavior under supersymmetry transformations.^ A general feature of all possible quantum theories of gravitation is that they lead to a field theory description at low (as compared to the Planck mass) energies. The theoretical consistency, uniqueness and consequences of such an effective theory are investigated. I show that a power counting theorem allows for the momentum expansion that defines the effective theory even in the presence of large masses. I also show that graviton-graviton scattering is free of potential infrared and collinear divergencies that plague perturbative discussions of Yang-Mills theories. ^

Subject Area

Physics, Elementary Particles and High Energy

Recommended Citation

Tibor Torma, "Low -energy dynamics of gravitation" (January 1, 1997). Doctoral Dissertations Available from Proquest. Paper AAI9823783.
http://scholarworks.umass.edu/dissertations/AAI9823783

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