Flavor Violation in Warped Extra Dimensions and CP Asymmetries in B Decays

Abstract

We show that CP asymmetries in $b\to s$ hadronic decays are potentially affected by the presence of massive color-octet particles strongly coupled to the third generation quarks. Theories with warped extra dimensions provide natural candidates in the Kaluza-Klein excitations of gluons in scenarios where flavor-breaking by bulk fermion masses results in the localization of fermion wave-functions. Topcolor models, in which a new gauge interaction leads to top-condensation and a large top mass, also result in the presence of these color-octet states with TeV masses . We find that large effects are possible in modes such as $B\to \varphi K_s$, $B\to {\eta }^{\prime }{K}_s$ and $B\to {\pi }^0{K}_s$ among others.

Comments: Version to appear in Physics Letters B