7 papers
Super-heavy Quarkonia and the Gluon Condensate
Jochen Fingberg
The early idea that a non-perturbative gluon condensate affects the spectrum of heavy quarks is revisited in the light of modern simulation techniques. We evaluate the low lying sp…
Improved Upsilon Spectrum with Dynamical Wilson Fermions
N. Eicker, J. Fingberg, S. Güsken +5
We present results for the b \bar b spectrum obtained using an O(M_bv^6)-correct non-relativistic lattice QCD action, where M_b denotes the bare b-quark mass and v^2 is the mean sq…
Heavy Quarkonia at High Temperature
Jochen Fingberg
We present a new method to study the properties of heavy quarks at finite temperature. It combines non-relativistic QCD with an improved gluonic action on anisotropic lattices. The…
Super-heavy Quarkonia as a probe of the QCD Vacuum
J. Fingberg
We investigate the effect of a non-perturbative gluon condensate on the spectrum of bound states of extremely heavy quarks using Non-Relativistic-QCD (NRQCD). Simulations are done…
Anti-Ferromagnetic Condensate in Yang-Mills Theory
Jochen Fingberg, Janos Polonyi
SU(2) gauge theory with competing interactions is shown to possess a rich phase structure with anti-ferromagnetic vacua. It is argued that the phase boundaries persist in the weak…
Universality, Scaling and Topology with a Modified Lattice Action
J. Fingberg
We examined the effect of a complete suppression of a lattice artifact, the negative plaquettes, on physical quantities, such as the critical temperature, the string tension, the t…