Relaxing the Constraint on Compact Extradimension

Figure 1

The region, in the plot showing brane tension vs. compactification scale, disallowed by the and LEP searches is depicted in red (or ) and the allowed parameter space of the model is shown in green (or ). We have kept the mass of branon a variable such that the dark matter relic density is always satisfied for a given brane tension. The figures correspond to the cutoff scales  TeV,  TeV, and  TeV, respectively.

(a)

(b)

(c)