Long distance chiral corrections in B meson amplitudes

Abstract

We discuss the chiral corrections to f_B and B_B with particular emphasis on determining the portion of the correction that arises from long distance physics. For very small pion and kaon masses all of the usual corrections are truly long distance, while for larger masses the long distance portion decreases. These chiral corrections have been used to extrapolate lattice calculations towards the physical region of lighter masses. We show in particular that the chiral extrapolation is better behaved if only the long distance portion of the correction is used.

14 pages, 4 figures

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• Lattice calculation of SU(3) flavor breaking ratios in B - anti-B mixing
• Searching for chiral logs in the static-light decay constant
• QCD Down Under: Building Bridges
• Phenomenology of static-light mesons from unquenched lattice QCD calculations