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A precise determination of the decay constant of the Ds-meson in quenched QCD

✍ Scribed by Andreas Jüttner; Juri Rolf

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
292 KB
Volume
129-130
Category
Article
ISSN
0920-5632

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✦ Synopsis

We present a precise determination of the leptonic decay constant FD, of the D,-meson in quenched lattice &CD. This work is particularly focused on the analysis and discussion of all sources of systematic errors. We simulate directly at the physical quark masses for five different lattice spacings between 0.1 fm and 0.03 fm using O(a)-improvement.

The finest lattice is still work in progress. After taking the continuum limit and setting the scale with the Kaon decay constant FK = 160 MeV we arrive at a value of FD, = 252(9) MeV. Setting the scale with the nucleon mass instead leads to a decrease of about 20 MeV of FD,.

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Precise determination of the Grinstein r
Precise determination of the Grinstein ratio of heavy-light decay constant in unquenched QCD
✍ T. Onogi; M. Fukugita; S. Hashimoto; K-I. Ishikawa; N. Ishizuka; Y. Iwasaki; K. 📂 Article 📅 2003 🏛 Elsevier Science 🌐 English ⚖ 261 KB

We study the chiral behavior of the ratio of heavy-light decay constants on unquenched lattices with two flavor dynamical quarks using the plaquette gauge action and the nonperturbatively O(a)-improved Wilson fermion action at ,0 = 5.2. The heavy quarks are described by the clover action and the NRQ