title: Bs-->K(*)0 K(*)0 CP asymmetries: golden channels for new physics searches.
abstract: We point out that time-dependent CP asymmetries in B_(s)-->K(*0) K[over](*0) decays probe the presence of new physics in b-->s transitions with an unprecedented theoretical accuracy. We show that, contrary to the case of B_(d)-->phiK_(S), it is possible to obtain a model-independent prediction for the coefficient S(B_(s)-->K(*0) K[over](*0)) in the standard model. We give an estimate of the experimental precision achievable with the next generation of B physics experiments. We also discuss how this approach can be extended to the case of B_(s)-->K[over](*0) K(0), B_(s)-->K(*0) K[over](0), and B_(s)-->K(0) K[over](0) decays and the different experimental challenges for these channels.
authors.affiliation: Dipartimento di Fisica, Università di Roma Tre and INFN, Sezione di Roma Tre, Via della Vasca Navale 84, Rome, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Ciuchini
authors.forename: M
authors.initials: M
authors.lastname: Pierini
authors.forename: L
authors.initials: L
authors.lastname: Silvestrini