K0-anti-K0 mixing in the 1/Nc expansion

Abstract

We present the result for the invariant B_K factor of K0-anti-K0 mixing in the chiral limit and to next-to-leading order in the 1/Nc expansion. We explicitly demonstrate the cancellation of the renormalization scale and scheme dependences between short- and long-distance contributions in the final expression. Numerical estimates are then given, by taking into account increasingly refined short- and long-distance constraints of the underlying QCD Green's function which governs the B_K factor.

10 pages, LateX, 2 figures. New hadronic function with triple poles. Improved interpolation between short and long distances. Discussion changed accordingly. Slight changes in final numerical result

References in corpus (1)

• Light Hadron Weak Matrix Elements

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