B0 - anti-B0 mixing beyond factorization

Details B0 - anti-B0 mixing beyond factorization B0 - anti-B0 mixing beyond factorization

2003-06-03

arxiv.org/abs/hep-ph/0306032v1

Phys.Rev.Lett. 91 (2003) 192002

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures, LaTeX2e

Scientific paper

10.1103/PhysRevLett.91.192002

We present a calculation of the B0 - anti-B0 mixing matrix element in the framework of QCD sum rules for three-point functions. We compute alpha_s corrections to a three-point function at the three-loop level in QCD perturbation theory, which allows one to extract the matrix element with next-to-leading order (NLO) accuracy. This calculation is imperative for a consistent evaluation of experimentally-measured mixing parameters since the coefficient functions of the effective Hamiltonian for B0 - anti-B0 mixing are known at NLO. We find that radiative corrections violate factorization at NLO; this violation is under full control and amounts to 10%.

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