Zobrazeno 1 - 10
of 127
pro vyhledávání: '"Guesken, S."'
Autor:
Struckmann, T., Schilling, K., Bali, G., Eicker, N., Guesken, S., Lippert, Th., Neff, H., Orth, B., Schroers, W., Viehoff, J., Ueberholz, P.
Publikováno v:
Phys.Rev. D63 (2001) 074503
We perform a lattice mass analysis in the flavour singlet pseudoscalar channel on the SESAM and TXL full QCD vacuum configurations, with 2 active flavours of dynamical Wilson fermions at beta = 5.6. At our inverse lattice spacing, a^-1 = 2.3 GeV, we
Externí odkaz:
http://arxiv.org/abs/hep-lat/0010005
Autor:
Struckmann, T., Schilling, K., Ueberholz, P., Eicker, N., Guesken, S., Lippert, Th., Neff, H., Orth, B., Viehoff, J.
We present a study on the direct determination of the $\eta '$ mass on the full set of SESAM and T$\chi$L QCD vacuum configurations with 2 active flavours of Wilson fermions, at $\beta = 5.6$. We observe a definite dependency of the two-loop correlat
Externí odkaz:
http://arxiv.org/abs/hep-lat/0006012
Autor:
Güsken, S.
Flavor singlet combinations of quark operators ${\cal{O}}_S^{\Gamma} = \bar{u}\Gamma u + \bar{d}\Gamma d + \bar{s}\Gamma s$ contribute to many important physical observables in the low energy region of QCD. Experimentally one finds the values of some
Externí odkaz:
http://arxiv.org/abs/hep-lat/9906034
Autor:
Güsken, S.
The calculation of physical quantities by lattice QCD simulations requires in some important cases the determination of the inverse of a very large matrix. In this article we describe how stochastic estimator methods can be applied to this problem, a
Externí odkaz:
http://arxiv.org/abs/hep-lat/9906035
Autor:
SESAM Collaboration, Spitz, A., Hoeber, H., Eicker, N., Guesken, S., Lippert, Th., Schilling, K., Struckmann, T., Ueberholz, P., Viehoff, J.
Publikováno v:
Phys.Rev. D60 (1999) 074502
We estimate the QCD coupling constant from a lattice calculation of the bottomonium spectrum. The second order perturbative expansion of the plaquette expectation value is employed to determine alpha_S at a scale set by the 2S-1S and 1P-1S level spli
Externí odkaz:
http://arxiv.org/abs/hep-lat/9906009
Autor:
Güsken, S., Ueberholz, P., Viehoff, J., Eicker, N., Lippert, T., Schilling, K., Spitz, A., Struckmann, T.
We present the results of a full QCD lattice calculation of the flavor singlet axial vector coupling $G_A^1$ of the proton. The simulation has been carried out on a $16^3\times 32$ lattice at $\beta=5.6$ with $n_f=2$ dynamical Wilson fermions. It tur
Externí odkaz:
http://arxiv.org/abs/hep-lat/9901009
Autor:
SESAM Collaboration, Spitz, A., Eicker, N., Guesken, S., Hoeber, H., Lacock, P., Lippert, T., Schilling, K., Struckmann, T., Ueberholz, P., Viehoff, J.
Publikováno v:
Nucl.Phys.Proc.Suppl. 73 (1999) 327-329
We estimate the strong coupling constant from the perturbative expansion of the plaquette. The scale is set by the 2S-1S and 1P-1S splittings in bottomonium which are computed in NRQCD on dynamical gauge configurations with nf=2 degenerate Wilson qua
Externí odkaz:
http://arxiv.org/abs/hep-lat/9809130
Autor:
SESAM-Collaboration, Güsken, S., Ueberholz, P., Viehoff, J., Eicker, N., Lacock, P., Lippert, T., Schilling, K., Spitz, A., Struckmann, Th.
Publikováno v:
Phys.Rev.D59:054504,1999
We calculate connected and disconnected contributions to the flavour singlet scalar density amplitude of the nucleon in a full QCD lattice simulation with $n_f=2$ dynamical Wilson fermions at $\beta=5.6$ on a $16^3 \times 32$ lattice. We find that bo
Externí odkaz:
http://arxiv.org/abs/hep-lat/9809066
Autor:
Lippert, Th., Alles, B., Bali, G., D'Elia, M., Di Giacomo, A., Eicker, N., Guesken, S., Schilling, K., Spitz, A., Struckmann, T., Ueberholz, P., Viehoff, J.
Publikováno v:
Nucl.Phys.Proc.Suppl.73:521-523,1999
The investigation of the decorrelation efficiency of the HMC algorithm with respect to vacuum topology is a prerequisite for trustworthy full QCD simulations, in particular for the computation of topology sensitive quantities. We demonstrate that for
Externí odkaz:
http://arxiv.org/abs/hep-lat/9809034
Autor:
Eicker, N., Glässner, U., Güsken, S., Hoeber, H., Lacock, P., Lippert, Th., Schilling, K., Spitz, A., Struckmann, Th., Ueberholz, P., Viehoff, J.
Publikováno v:
Phys. Rev. D 59, 014509 (1998)
We present the final analysis of the light and strange hadron spectra from a full QCD lattice simulation with two degenerate dynamical sea quark flavours at $\beta = 5.6$ on a $16^3 \times 32$ lattice. Four sets of sea quark masses corresponding to t
Externí odkaz:
http://arxiv.org/abs/hep-lat/9806027