Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2008-01-06
Phys.Rev.D77:065009,2008
Physics
High Energy Physics
High Energy Physics - Theory
REVTeX4, 17 pages, 1 figure
Scientific paper
10.1103/PhysRevD.77.065009
We study compactified pure gauge/gravitational theories with gauge-fixing terms and show that these theories possess quantum mechanical SUSY-like symmetries between unphysical degrees of freedom. These residual symmetries are global symmetries and generated by quantum mechanical N=2 supercharges. Also, we establish new one-parameter family of gauge choices for higher-dimensional gravity, and calculate as a check of its validity one graviton exchange amplitude in the lowest tree-level approximation. We confirm that the result is indeed $\xi$-independent and the cancellation of the $\xi$-dependence is ensured by the residual symmetries. We also give a simple interpretation of the vDVZ-discontinuity, which arises in the lowest tree-level approximation, from the supersymmetric point of view.
Lim Chu S.
Nagasawa Tomoaki
Ohya Satoshi
Sakamoto Kazuki
Sakamoto Makoto
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