Signature of Strange-Beauty Squark in Bs Mixing and Collider Search

摘要

In the framework of Abelian horizontal symmetries, large strange-beauty mixing appears naturally in the right-handed sector. Adding SUSY, one in general would have a light strange-beauty squark that carries both strange and beauty flavor. Other squarks, gluinos and charginos are all at TeV scale when the constraints from K~0-K-bar~0 and D~0-D-bar~0 mixing are taken into account, but the neutralino may be light without violating the b → sγ constraint. B_s-B-bar_s mixing could be at present experimental limit or higher, but would in general carry a CP violating phase. Collider signatures of the strange beauty squark differ from standard bottom squarks with relative abundance of strange quarks in the final state.