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A note on gauge theories coupled to gravity

Tom Banks1,2,3, Matt Johnson2 and Assaf Shomer1

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We analyze the bound on gauge couplings em/mp, suggested by Arkani-Hamed et.al. We show this bound can be derived from simple semi-classical considerations and holds in spacetime dimensions greater than or equal to four. Non abelian gauge symmetries seem to satisfy the bound in a trivial manner. We comment on the case of discrete symmetries and close by performing some checks for the bound in higher dimensions in the context of string theory.

Keywords

Black Holes

D-branes

Global Symmetries

 

E-print Number: hep-th/0606277

Cited: by |

Refers: to

PACS

11.15.Kc Classical and semiclassical techniques

11.25.Uv D branes

04.60.-m Quantum gravity

04.70.Dy Quantum aspects of black holes, evaporation, thermodynamics

11.30.Er Charge conjugation, parity, time reversal, and other discrete symmetries

Subjects

Gravitation and cosmology

Particle physics and field theory

Dates

Issue 09 (September 2006)

Received 22 July 2006, accepted for publication 18 August 2006

Published 20 September 2006



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