g(B*Bpi)-coupling in the static heavy quark limit

Details g(B*Bpi)-coupling in the static heavy quark limit g(B*Bpi)-coupling in the static heavy quark limit

2009-05-20

arxiv.org/abs/0905.3355v3

Phys.Lett.B679:231-236,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 3 figs (published version)

Scientific paper

10.1016/j.physletb.2009.07.031

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 N_f=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 g=0.44 +/- 0.03 (+0.07/-0.00), where the second error is flat (not gaussian).

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