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### A high statistics lattice calculation of using the clover action / N. Cabibbo, F. Marzano, F. Rapuano, A. Vladikas, G. Salina, S. Cabasino, G. Martinelli, G.M. Todesco, W. Tross, V. Lubicz, M. Crisafulli, C. Battista, P.S. Paolucci, J. Pech, R. Sarno, M. Torelli, P. Vicini, A. Bartoloni, Chris Allton

Physics Letters B, Volume: 326, Issue: 3-4, Pages: 295 - 302

Swansea University Author:

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DOI (Published version): 10.1016/0370-2693(94)91325-0

Abstract

We present a calculation of $f_B$ in the static limit, obtained by numerical simulation of quenched QCD, at $\beta=6.2$ on a $18~3 \times 64$ lattice, using the SW-Clover quark action. The decay constant has been extracted by studying heavy(static)-light correlation functions of different smeared op...

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Published in: Physics Letters B 03702693 1994 https://cronfa.swan.ac.uk/Record/cronfa28496 No Tags, Be the first to tag this record!
Abstract: We present a calculation of $f_B$ in the static limit, obtained by numerical simulation of quenched QCD, at $\beta=6.2$ on a $18~3 \times 64$ lattice, using the SW-Clover quark action. The decay constant has been extracted by studying heavy(static)-light correlation functions of different smeared operators, on a sample of 220 gauge field configurations. We have obtained $f_B~{static}=(290 \pm 15 \pm 45)$ MeV, where the first error comes from the uncertainty in the determination of the matrix element and the second comes from the uncertainty in the lattice spacing. We also obtain $M_{B_s}-M_{B_d}= (70 \pm 10)$ MeV and $f~{stat}_{B_s}/f~{stat}_{B_d}=1.11(3)$. A comparison of our results with other calculations of the same quantity is made. College of Science 3-4 295 302