Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR1.8k papers
- Deutsches Elektronen-Synchrotron DESYDE1.7k papers
- Lawrence Berkeley National LaboratoryUS1.7k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR1.7k papers
- TU Dortmund UniversityDE1.6k papers
- Heidelberg UniversityDE1.6k papers
- The Ohio State UniversityUS1.6k papers
- Stockholm UniversitySE1.6k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.5k papers
- University of California, IrvineUS1.5k papers
- Johannes Gutenberg University MainzDE1.5k papers
- Laboratoire de Physique Nucléaire et de Hautes ÉnergiesFR1.5k papers
30 papers · 1 filter
To the problem of 1/Nc approximation in the Nambu-Jona-Lasinio model
D. Ebert, M. Nagy. M. K. Volkov
In this article, the gap equation for the constituent quark mass in the U(2)*U(2) Nambu-Jona-Lasinio model for the 1/Nc approximation is investigated. It is shown that taking into…
Geometrical Properties of Conformal Field Theories Coupled to Two-Dimensional Quantum Gravity
S. Braune, HU Berlin
In this work we discuss an approach due to F. David to the geometry of world sheets of non-critical strings in quasiclassical approximation. The gravitational dressed conformal dim…
Towards a Lattice Calculation of the Nucleon Structure Functions
M. Goeckeler, R. Horsley, M. Ilgenfritz +4
We have initiated a programme to compute the lower moments of the unpolarised and polarised deep inelastic structure functions of the nucleon in the quenched approximation. We revi…
Gaugino Condensation in the Chiral and Linear Representation of the Dilaton
Ingo Gaido, Dieter Lust
String effective theories with N=1 supersymmetry in four dimensions are subject of the discussion. Gaugino condensation in the chiral representation of the dilaton is reviewed in t…
Combining Vector-- and Heavy Quark Symmetry
Thorsten Feldmann, Thomas Mannel
Assuming that the chiral symmetry of the light degrees of freedom is realized as the vector symmetry proposed by Georgi, we write down a chiral Lagrangian for heavy mesons which in…
New algorithm for gauge fixing in SU(2) lattice gauge theory
G. S. Bali, V. Bornyakov, M. Müller-Preussker +1
An overrelaxed variant of simulated annealing is applied to the problem of maximally abelian gauge fixing. The superiority of this algorithm over the commonly used relaxation proce…
On dependence of the static potential in a finite volume
G. ~Cella, V. K. ~Mitrjushkin, A. ~Viceré
We study the dependence on of the static potential defined from Wilson loops and from Polyakov loop correlators on a finite lattice. For this study we employ a…
Pseudoscalar correlators and the problem of the chiral limit in the compact lattice QED with Wilson fermions
A. Hoferichter, V. K. Mitrjushkin, M. Müller-Preussker
The phase diagram for the compact lattice QED with Wilson fermions is shown. We discuss different methods for the calculation of the 'pion' mass near the chiral transition po…
Polyakov loop and spin correlators on finite lattices A study beyond the mass gap
J. ~Engels, V. K. ~Mitrjushkin, T. ~Neuhaus
We derive an analytic expression for point-to-point correlation functions of the Polyakov loop based on the transfer matrix formalism. For the Ising model we show that the res…
On the Relation of Four-Dimensional N=2,4 -- Supersymmetric String Backgrounds to Integrable Models
Gabriel Lopes Cardoso, Dieter Lüst
In this letter we discuss the relation of four-dimensional, supersymmetric string backgrounds to integrable models. In particular we show that non-Kählerian gravitational bac…
A new simulation algorithm for lattice QCD with dynamical quarks
B. Bunk, K. Jansen, B. Jegerlehner +3
A previously introduced multi-boson technique for the simulation of QCD with dynamical quarks is described and some results of first test runs on a lattice with Wilso…
Universality and the approach to the continuum limit in lattice gauge theory
G. de Divitiis, R. Frezzotti, M. Guagnelli +5
The universality of the continuum limit and the applicability of renormalized perturbation theory are tested in the SU(2) lattice gauge theory by computing two different non-pertur…
Two-loop computation of a finite volume running coupling on the lattice
Ulli Wolff
In pure SU(2) gauge theory we compute the two-loop coefficient in the relation between the lattice bare coupling and the running coupling defined through the Schroedinger functiona…
Moduli Dependent Non-Holomorphic Contributions of Massive States to Gravitational Couplings and -Terms in -Orbifold Compactifications
Gabriel Lopes Cardoso, Dieter Lüst, Burt A. Ovrut
It is pointed out that massive states in D=4, N=1 supergravity-matter theories can, in general, at the 1-loop level contribute non-holomorphic terms to quadratic gravitational coup…
Spectrum of the Dirac Operator and Inversion Algorithms with Dynamical Staggered Fermions
Thomas Kalkreuter
Complete spectra of the staggered Dirac operator $\Dirac$ are determined in four-dimensional gauge fields with and without dynamical fermions. An attempt is made to relate…
On gravitational dressing of renormalization group beta-functions beyond lowest order of perturbation theory
H. Dorn
Based on considerations in conformal gauge I derive up to nextleading order a relation between the coefficients of beta-functions in 2D renormalizable field theories before and aft…
Duality Symmetries and Supersymmetry Breaking in String Compactifications
G. Lopes Cardoso, D. Lust, Thomas Mohaupt
We discuss the spontaneous supersymetry breaking within the low-energy effective supergravity action of four-dimensional superstrings. In particular, we emphasize the non-universal…
Multigrid Methods for Propagators in Lattice Gauge Theories
Thomas Kalkreuter
Multigrid methods were invented for the solution of discretized partial differential equations in ordered systems. The slowness of traditional algorithms is overcome by updates on…
Compact lattice QED with Wilson fermions
A. Hoferichter, V. K. Mitrjushkin, M. Müller-Preussker +2
We study the phase structure and the chiral limit of compact lattice QED with Wilson fermions (both dynamical and quenched). We use the standard Wilson gauge action and also a…
Spectrum of the Dirac Operator and Multigrid Algorithm with Dynamical Staggered Fermions
Thomas Kalkreuter
Complete spectra of the staggered Dirac operator $\Dirac$ are determined in quenched four-dimensional gauge fields, and also in the presence of dynamical fermions. Periodic…
Scaling in the Positive Plaquette Model and Universality in SU(2) Lattice Gauge Theory
J. Fingberg, U. M. Heller, V. Mitrjushkin
We investigate universality, scaling, the beta-function and the topological charge in the positive plaquette model for SU(2) lattice gauge theory. Comparing physical quantities, li…
Compact Lattice QED with Staggered Fermions and Chiral Symmetry Breaking
A. Hoferichter, V. K. Mitrjushkin, M. Müller-Preussker
Different formulations of the compact lattice QED with staggered fermions (standard Wilson and modified by suppression of lattice artifacts) are investigated by Monte Carlo si…
Effective Meson Lagrangian with Chiral and Heavy Quark Symmetries from Quark Flavor Dynamics
D. Ebert, T. Feldmann, R. Friedrich +1
By bosonization of an extended NJL model we derive an effective meson theory which describes the interplay between chiral symmetry and heavy quark dynamics. This effective theory i…
Infinitesimal Deformations and Obstructions for Toric Singularities
Klaus Altmann
The obstruction space T^2 and the cup product T^1 x T^1 -> T^2 are computed for toric singularities.