gBBπ-coupling in the static heavy quark limit

gBBπ-coupling in the static heavy quark limit

By means of QCD simulations on the lattice, we compute the coupling of the heavy–light mesons to a soft pion in the static heavy quark limit. The gauge field configurations used in this calculations include the effect of Nf=2 dynamical Wilson quarks, while for the static quark propagator we use its...

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Veröffentlicht in:Physics letters. B 2009-08, Vol.679 (3), p.231-236
Hauptverfasser: Bećirević, Damir, Blossier, Benoit, Chang, Emmanuel, Haas, Benjamin
Format: Artikel
Sprache:eng
Schlagworte:
Exact sciences and technology
Nuclear physics
Physics
The physics of elementary particles and fields
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Zusammenfassung:By means of QCD simulations on the lattice, we compute the coupling of the heavy–light mesons to a soft pion in the static heavy quark limit. The gauge field configurations used in this calculations include the effect of Nf=2 dynamical Wilson quarks, while for the static quark propagator we use its improved form (so-called HYP). On the basis of our results we obtain that the coupling gˆ=0.44±0.03−0.00+0.07, where the second error is flat (not Gaussian).
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2009.07.031