Randall-Sundrum with Kalb-Ramond field: return of the hierarchy problem?
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We show that when the antisymmetric Kalb-Ramond field is included in the Randall-Sundrum scenario, although the hierarchy problem can be solved, it requires an extreme fine tuning of the Kalb-Ramond field (about 1 part in $10^{62}$). We interpret this as the return of the problem in disguise. Further, we show that the Kalb-Ramond field induces a small negative cosmological constant on the visible brane.
8 pages, latex, 4 figures. Contributed talk at `Recent Developments in Gravity' (NEB XII), Nafplion, Greece, 29 June 2006
8 pages, latex, 4 figures. Contributed talk at `Recent Developments in Gravity' (NEB XII), Nafplion, Greece, 29 June 2006