Browsing by Author "Jegerlehner, F."
Now showing items 1-15 of 15
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B-meson properties from lattice QCD
Alexandrou, Constantia; Jegerlehner, F.; Güsken, S.; Schilling, K.; Sommer, R. (1991)A high statistics computation of the decay constant f{hook}B is presented to study scaling and finite size effects. Smooth wave functions for the B-meson allow to suppress excited state contributions effectively. We observe ...
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Article
Beautiful baryons from lattice QCD
Alexandrou, Constantia; Borrelli, A.; Güsken, S.; Jegerlehner, F.; Schilling, K.; Siegert, G.; Sommer, R. (1994)We perform a lattice study of heavy baryons, containing one (Λb) or two b-quarks Ξb. Using the quenched approximation we obtain for the mass of Λb, MΛb = 5.728 ± 0.144 ± 0.018 GeV. The mass splitting between the λb and the ...
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Article
Bounds on |B from lattice QCD
Alexandrou, Constantia; Güsken, S.; Jegerlehner, F.; Schiling, K.; Sommer, R. (1992)We present a study of finite-a effects in the leptonic decay constant |P of heavy pseudoscalar mesons. Exploiting results on three lattices - with inverse lattice spacing a-1 = 3.35, 2.3 and 1.53 GeV - to extrapolate |P ...
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Article
Deconfinement phase transition in one-flavor QCD
Alexandrou, Constantia; Boriçi, A.; Feo, A.; De Forcrand, P.; Galli, A.; Jegerlehner, F.; Takaishi, T. (1999)We present a study of the deconfinement phase transition of one-flavor QCD using the multiboson algorithm. The mass of the Wilson fermions relevant for this study is moderately large and the non-Hermitian multiboson method ...
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Article
Full QCD with the Lüscher local bosonic action
Alexandrou, Constantia; Borrelli, A.; de Forcrand, Ph; Galli, A.; Jegerlehner, F. (1995)We investigate Lüscher's method of including dynamical Wilson fermions in a lattice simulation of QCD with two quark flavours. We measure the accuracy of the approximation by comparing it with Hybrid Monte Carlo results ...
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Article
Heavy-light baryonic mass splittings from the lattice
Alexandrou, Constantia; Borrelli, A.; Güsken, S.; Jegerlehner, F.; Schilling, K.; Siegert, G.; Sommer, R. (1995)We present here lattice estimates of the heavy-light baryon Λb, obtained using propagating heavy quarks. Our result is: MΛstaggeredb = 5.728 ± 0.144 ± 0.018 Gev, after extrapolation to the continuum limit and in the quenched ...
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Article
The leptonic decay constants of {Mathematical expression} mesons and the lattice resolution
Alexandrou, Constantia; Güsken, S.; Jegerlehner, F.; Schilling, K.; Siegert, G.; Sommer, R. (1994)We present a high statistics study of the leptonic decay constant fP of heavy pseudoscalar mesons using propagating heavy Wilson quarks within the quenched approximation, on lattices covering sizes from about 0.7 fm to 2 ...
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Article
One-flavour QCD at finite temperature
Alexandrou, Constantia; Boriçi, A.; Feo, A.; De Forcrand, P.; Galli, A.; Jegerlehner, F.; Takaishi, T. (1998)We present results, for heavy to moderate quark masses, of a study of thermodynamic properties of 1-flavour QCD, using the multiboson algorithm. Finite-size scaling behaviour is studied on lattices of size 83 × 4, 123 × 4 ...
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Article
Phase structure of one-flavour QCD
Alexandrou, Constantia; Boriçi, A.; Feo, A.; de Forcrand, Ph; Galli, A.; Jegerlehner, F.; Takaishi, T. (1999)We present a study of the deconfinement phase transition of one-flavour QCD, using the multiboson algorithm. The mass of the Wilson fermions relevant for this study is moderately large and the non-Hermitian multiboson ...
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Article
Results in the static approximation
Alexandrou, Constantia; Güsken, S.; Jegerlehner, F.; Schilling, K.; Sommer, R. (1993)We present a comprehensive study of finite volume and lattice spacing effects on observables calculated in the static approximation. Ground state projection using smearing techniques is studied at β = 6.26. We give high ...
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Article
A scaling analysis of heavy-light-meson properties
Sommer, R.; Alexandrou, Constantia; Jegerlehner, F.; Güsken, S.; Schilling, K. (1992)Within the quenched approximation, we study the lattice spacing dependence of various observables of heavy-light-mesons in the mass range 1 GeV to mB and in the static approximation. Large corrections to the leading order ...
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Article
Scaling behavior and volume dependence of B-meson properties
Sommer, R.; Alexandrou, Constantia; Jegerlehner, F.; Güsken, S.; Schilling, K. (1991)A high statistics computation of the decay constant fB is presented to study scaling and finite size effects. Smooth wave functions for the B-meson allow to suppress excited state contributions effectively. We observe the ...
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Article
Scaling study of the leptonic decay constants of heavy-light mesons: a consumers report on improvement factors
Güsken, S.; Alexandrou, Constantia; Jegerlehner, F.; Schilling, K.; Siegert, G.; Sommer, R. (1994)A high statistics calculation, performed at β = 5.74, 6.00 and 6.26, enables us to study the variation of the leptonic decay constant fP of heavy pseudoscalar mesons with the lattice spacing a. We observe only a weak a ...
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Article
The static approximation of heavy-light quark systems. A detailed lattice study
Alexandrou, Constantia; Güsken, S.; Jegerlehner, F.; Schilling, K.; Sommer, R. (1994)We present a study of finite a and volume effects of the leptonic decay constant f{hook} of heavy pseudoscalar mesons in the static approximation. This study is performed on a number of lattices at β = 5.74, 6.0 and 6.26 ...
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Thermodynamics of 1-flavor QCD
Alexandrou, Constantia; Boriçi, A.; Feo, A.; De Forcrand, P.; Galli, A.; Jegerlehner, F.; Takaishi, T. (1997)We present first results, for heavy to moderate quark masses, of a study of thermodynamic properties of 1-flavor QCD, using the multiboson algorithm.