Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9861225 | Physics Letters B | 2005 | 6 Pages |
Abstract
In the effective field theory of quantum gravitation coupled to Ns scalars, Nf fermions, and NV vectors, tree unitarity is violated at an energy squared of ECM2=20(GNN)â1, where Nâ¡23Ns+Nf+4NV and GN is Newton's constant. This is related to radiative corrections proportional to GNNE2 (where E is the typical energy), due to loops of such particles. New physics must enter before ECMâ6Ã1018GeV in the standard model, and 4Ã1018GeV in the minimal supersymmetric standard model.
Related Topics
Physical Sciences and Engineering
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Nuclear and High Energy Physics
Authors
Tao Han, Scott Willenbrock,