Collider Tests of Compact Space Dimensions Using Weak Gauge Bosons

Abstract

We present collider tests of the recent proposal for weak-scale quantum gravity due to new large compact space dimensions in which only the graviton ($\text{G}$) propagates. We show that the existing high precision LEP-I $Z$-pole data can impose non-trivial constraints on the scale of the new dimensions, via the decay mode $Z\to f\bar{f}+\text{G}$ ($f=q,\ell$). These bounds are comparable to those obtained at high energy colliders and provide the first sensitive probe of the scalar graviton. We also study $W(Z)+\text{G}$ production and the anomalous $WW(ZZ)$ signal from virtual $\text{G}$-states at the Fermilab Tevatron, and compare them with the LEP-I bound and those from LEP-II and future linear colliders.

Comments: 4 pages, 1 postscript figure included