https://doi.org/10.1140/epjp/i2012-12146-3
Regular Article
The S-matrix and graviton self-energy in quantum Yang-Mills gravity
Department of Physics, University of Massachusetts Dartmouth, 02747-2300, North Dartmouth, MA, USA
* e-mail: jhsu@umassd.edu
Received:
8
June
2012
Revised:
8
August
2012
Accepted:
16
October
2012
Published online:
3
December
2012
The S-matrix, its unitarity and the graviton self-energy at the one-loop level are discussed on the basis of quantum Yang-Mills gravity with the translational gauge symmetry in flat space-time. The unitarity and gauge invariance of the S -matrix in a class of gauge conditions is preserved by massless ghost vector particles, called “Feynman-DeWitt-Mandelstam” (FDM) ghosts, in quantum Yang-Mills gravity. Using dimensional regularization, the graviton self-energy is explicitly calculated with a general gauge condition. The resultant divergence of graviton self-energy at the one-loop level resembles that in quantum electrodynamics.
© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg, 2012
