A solution to the flavor problem in warped extra dimensions

Models with warped extra dimensions (Randall Sundrum models) can explain the hierarchy in the quark masses and mixings based on the geometry of the fifth dimension. Furthermore can the same geometry arrange for a suppression of dangerous flavor changing neutral currents, without the need of additional assumptions such as minimal flavor violation. This so called RS-GIM mechanism has proven to be extremely successful, apart from one observable: The CP-violating quantity in K- anti K mixing, εK, which requires significant fine-tuning in order to agree with a new physics scale in the TeV range. This is known as the RS flavor problem. We have found that an extension of the strong interaction gauge group can solve the RS flavor problem without suppressing interesting effects in other flavor sectors.