Browsing Τμήμα Φυσικής / Department of Physics by Author "Güsken, S."

Article

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...