B mixing on the lattice: fB, fBs and related quantities
Abstract
The MILC collaboration computation of heavy-light decay constants is described. Results for fB, fBs, fD, fDs and their ratios are presented. These results are still preliminary, but the analysis is very close to being completed. Sources of systematic error, both within the quenched approximation and from quenching itself, are estimated, although the latter estimate is rather crude. At present, the largest source of error comes from the extrapolation to the continuum. The chiral extrapolation errors are almost as large in a few cases. A sample of our results is: fB=153+/-10-13 -0+36 +13 MeV, fBs/fB=1.10+/-0.02-0.03 0.02+0.05 +0.03, and fB/fDs=0.76+/-0.03-0.04 -0.01+0.07 +0.02, where the errors are statistical, systematic (within the quenched approximation), and systematic (of quenching), respectively.
- Publication:
-
Twenty Beautiful Years of Bottom Physics
- Pub Date:
- February 1998
- DOI:
- arXiv:
- arXiv:hep-ph/9709328
- Bibcode:
- 1998AIPC..424..227B
- Keywords:
-
- 14.40.Gx;
- 12.38.Gc;
- Mesons with S=C=B=0 mass>2.5 GeV;
- Lattice QCD calculations;
- High Energy Physics - Phenomenology;
- High Energy Physics - Lattice
- E-Print:
- 9 pages, 3 included postscript figures, uses aipproc.sty and epsfig. Invited talk presented by C. Bernard at "b20: Twenty Beautiful Years of Bottom Physics," Illinois Institute of Technology, June 29-July 2, 1997