17-24 July 2013
KTH and Stockholm University Campus
Europe/Stockholm timezone

Mass of the b-quark from QCD sum rules for fB and fBs

18 Jul 2013, 09:15
D1 (KTH Campus)


KTH Campus

Talk presentation Flavour Physics and Fundamental Symmetries Flavour Physics and fundamental symmetries


Dmitri Melikhov (M. V. Lomonosov State University)


We demonstrate that Borel QCD sum rules for heavy-light currents yield a very strong correlation between the b-quark mass and the resulting decay constant of the B-meson. This opens the possibility of an accurate determination of the b-quark mass from the sum rule using the values of fB and fBs as inputs. Combining recent accurate lattice QCD determinations of fB and fBs with our sum-rule analysis based on the three-loop heavy-light correlation function leads to an accurate value $\overline{m}_b(\overline{m}_b)=4.245\pm 0.025$ GeV.

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