Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Rothe, H. J."'
Autor:
Frewer, M., Rothe, H. J.
Publikováno v:
Phys.Rev. D63 (2001) 054506
We prove that lattice QCD generates the axial anomaly in the continuum limit under very general conditions on the lattice action, which includes the case of Ginsparg-Wilson fermions. The ingredients going into the proof are gauge invariance, locality
Externí odkaz:
http://arxiv.org/abs/hep-lat/0004005
Autor:
Reisz, T., Rothe, H. J.
Publikováno v:
Phys.Rev. D62 (2000) 014504
Lattice gauge theories with Wilson fermions break chiral symmetry. In the U(1) axial vector current this manifests itself in the anomaly. On the other hand it is generally expected that the axial vector flavour mixing current is non-anomalous. We giv
Externí odkaz:
http://arxiv.org/abs/hep-lat/0003003
Publikováno v:
J.Phys.A33:2059-2068,2000
We obtain, for a subclass of structure functions characterizing a first class Hamiltonian system, recursive relations from which the general form of the local symmetry transformations can be constructed in terms of the independent gauge parameters. W
Externí odkaz:
http://arxiv.org/abs/hep-th/9909039
Autor:
Reisz, T., Rothe, H. J.
Publikováno v:
Nucl.Phys. B575 (2000) 255-266
Using functional techniques, we prove, to all orders of perturbation theory, that lattice vector gauge theories with Ginsparg Wilson fermions are renormalizable. For two or more massless fermions, they satisfy a flavour mixing axial vector Ward ident
Externí odkaz:
http://arxiv.org/abs/hep-lat/9908013
Autor:
Reisz, T., Rothe, H. J.
Publikováno v:
Nucl.Phys.Proc.Suppl. 83 (2000) 965-967
We give a perturbative proof that U(1) lattice gauge theories generate the axial anomaly in the continuum limit under very general conditions on the lattice Dirac operator. These conditions are locality, gauge covariance and the absense of species do
Externí odkaz:
http://arxiv.org/abs/hep-lat/9908014
Publikováno v:
Phys.Lett. B479 (2000) 429-434
Using purely Hamiltonian methods we derive a simple differential equation for the generator of the most general local symmetry transformation of a Lagrangian. The restrictions on the gauge parameters found by earlier approaches are easily reproduced
Externí odkaz:
http://arxiv.org/abs/hep-th/9907217
Publikováno v:
Phys.Lett. B463 (1999) 248-251
We reconsider the problem of finding all local symmetries of a Lagrangian. Our approach is completely Hamiltonian without any reference to the associated action. We present a simple algorithm for obtaining the restrictions on the gauge parameters ent
Externí odkaz:
http://arxiv.org/abs/hep-th/9906072
Autor:
Reisz, T., Rothe, H. J.
Publikováno v:
Phys.Lett. B455 (1999) 246-250
We give a perturbative proof that U(1) lattice gauge theories generate the axial anomaly in the continuum limit under very general conditions on the lattice Dirac operator. These conditions are locality, gauge covariance and the absense of species do
Externí odkaz:
http://arxiv.org/abs/hep-lat/9903003
Autor:
Rothe, H. J., Sadooghi, Neda
Publikováno v:
Phys.Rev. D58 (1998) 074502
By carrying out a systematic expansion of Feynman integrals in the lattice spacing, we show that the axial anomaly in the U(1) lattice gauge theory with Wilson fermions, as determined in one-loop order from an irrelevant lattice operator in the Ward
Externí odkaz:
http://arxiv.org/abs/hep-lat/9803026
Autor:
Kaste, P., Rothe, H. J.
Publikováno v:
Phys.Rev.D56:6804-6815,1997
We compute the electric screening mass in lattice QCD with Wilson fermions at finite temperature and chemical potential to one-loop order, and show that lattice artefacts arising from a finite lattice spacing result in an enhancement of the screening
Externí odkaz:
http://arxiv.org/abs/hep-lat/9704014