Lattice measurement of the couplings g_infinity and g_Bstar_B_pi

Details Lattice measurement of the couplings g_infinity and g_Bstar_B_pi Lattice measurement of the couplings g_infinity and g_Bstar_B_pi

2003-10-21

arxiv.org/abs/hep-lat/0310050v2

JHEP 0402:016,2004

Physics

High Energy Physics

High Energy Physics - Lattice

20 pages, 10 figures

Scientific paper

10.1088/1126-6708/2004/02/016

We present the results of a quenched lattice QCD study of the coupling g_hat, in the static heavy quark limit. After combining this with our previous results obtained by using propagating heavy quarks with a mass around the physical charm quark, we are able to interpolate to the b-quark sector. Our results are g_hat_infinity = 0.48 +/- 0.03 +/- 0.11, g_hat_b = 0.58 +/- 0.06 +/- 0.10, and g_Bstar_ B_p = 47 +/- 5 +/- 8.

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