arXiv:hep-lat/0310050·v2·High Energy Physics — Lattice
Lattice measurement of the couplings g_infinity and g_Bstar_B_pi
A. Abada (1)🇫🇷 · D. Becirevic (1)🇫🇷 · Ph. Boucaud (1)🇫🇷 · G. Herdoiza (1 and 2)🇫🇷 · J.P. Leroy (1)🇫🇷 · A. Le Yaouanc (1)🇫🇷 · O. Pène (1) ((1) LPT Orsay, (2) Physics Dpt Swansea)🇫🇷
Abstract
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.
Comments: 20 pages, 10 figures