Intersecting D-brane theories motivate the existence of exotic U(1) gauge
bosons that only interact with the Standard Model through kinetic mixing with
hypercharge. We analyze an effective field theory description of this effect
and describe the implications of these exotic gauge bosons on precision
electroweak, LHC and ILC observables.Comment: 6 pages, 4 figures, RevTex, PRD, v3: expanded discussions, ref
