Showing 2010 · hep-phShow all

21 papers · 2 filters

hep-ph2010★ 74 cited

Strong versus weak wave-turbulence in relativistic field theory

J. Berges, D. Sexty

Nonthermal scaling phenomena can exhibit a characteristic dependence on the dimensionality d of space. For d=3 and 4 we simulate a relativistic scalar field theory on a lattice and…

hep-ph2010★ 4 cited

Universal Aspects of Deconfinement in 2+1 Dimensions

Lorenz von Smekal, Sam R Edwards, Nils Strodthoff

The 2+1 dimensional pure SU(N) gauge theories with N <= 4 are candidates for applying the powerful tools of scaling and universality to their deconfinement transitions at finite te…

hep-ph2010★ 31 cited

Baryon Asymmetry of the Universe without Boltzmann or Kadanoff-Baym

J. -S. Gagnon, M. Shaposhnikov

We present a formalism that allows the computation of the baryon asymmetry of the universe from first principles of statistical physics and quantum field theory that is applicable…

hep-ph2010★ 76 cited

Quantum theory of fermion production after inflation

J. Berges, D. Gelfand, J. Pruschke

We show that quantum effects dramatically enhance the production of fermions following preheating after inflation in the early Universe in the presence of high excitations of boson…

hep-ph2010★ 64 cited

Hadronic light-by-light scattering in the muon g-2: a Dyson-Schwinger equation approach

Tobias Goecke, Christian S. Fischer, Richard Williams

We determine the hadronic light-by-light scattering contribution to the anomalous magnetic moment of the muon using the framework of Dyson-Schwinger and Bethe-Salpeter equations of…

hep-ph2010★ 19 cited

Topological defect formation from 2PI effective action techniques

J. Berges, S. Roth

We propose a quantum approach to nonequilibrium dynamics which combines the successful aspects of classical-statistical simulations on a lattice with the ability to take into accou…

hep-ph2010★ 82 cited

Nonlocal PNJL model beyond mean field and the QCD phase transition

A. E. Radzhabov, D. Blaschke, M. Buballa +1

A nonlocal chiral quark model is consistently extended beyond mean field using a strict 1/Nc expansion scheme. The parameters of the nonlocal model are refitted so that the physica…

hep-ph2010★ 3 cited

Hadronic contribution to the muon g-2 from a Dyson-Schwinger perspective

Tobias Goecke, Christian S. Fischer, Richard Williams

A novel approach towards the hadronic contributions to the anomalous magnetic moment of the muon is presented, namely the Dyson-Schwinger equations of QCD. It has the advanta…

hep-ph2010★ 7 cited

Scaling, decoupling and transversality of the gluon propagator

Christian S. Fischer, Lorenz von Smekal

In this note we discuss a couple of technical issues relevant to solving the Dyson-Schwinger equation for the gluon propagator in Landau gauge Yang-Mills theory. In the deep infrar…

hep-ph2010★ 4 cited

On the Infrared Behaviour of Landau Gauge Yang-Mills Theory with Differently Charged Scalar Fields

Reinhard Alkofer, Leonard Fister, Axel Maas +1

Recently it has been argued that infrared singularities of the quark-gluon vertex of Landau gauge QCD can confine static quarks via a linear potential. It is demonstrated that the…

hep-ph2010★ 3 cited

Baryons in and beyond the quark-diquark model

G. Eichmann, R. Alkofer, C. S. Fischer +2

We examine the nucleon's electromagnetic form factors in a Poincare-covariant Faddeev framework. The three-quark core contributions to the form factors are obtained by employing a…

hep-ph2010★ 53 cited

Quark spectral properties above Tc from Dyson-Schwinger equations

Jens A. Mueller, Christian S. Fischer, Dominik Nickel

We report on an analysis of the quark spectral representation at finite temperatures based on the quark propagator determined from its Dyson-Schwinger equation in Landau gauge. In…

hep-ph2010★ 20 cited

A fresh look at hadronic light-by-light scattering in the muon g-2 with the Dyson-Schwinger approach

Christian S. Fischer, Tobias Goecke, Richard Williams

We present first results for the hadronic light-by-light scattering contribution to the anomalous magnetic moment of the muon a_μ in the framework of Dyson-Schwinger and Bethe-Salp…

hep-ph2010★ 65 cited

Towards finite density QCD with Taylor expansions

Frithjof Karsch, Bernd-Jochen Schaefer, Mathias Wagner +1

Convergence properties of Taylor expansions of observables, which are also used in lattice QCD calculations at non-zero chemical potential, are analyzed in an effective N_f = 2+1 f…

hep-ph2010★ 13 cited

Delta properties in the rainbow-ladder truncation of Dyson-Schwinger equations

D. Nicmorus, G. Eichmann, A. Krassnigg +1

We present a calculation of the three-quark core contribution to nucleon and Delta-baryon masses and Delta electromagnetic form factors in a Poincare-covariant Faddeev approach. A…

hep-ph2010★ 54 cited

Delta and Omega electromagnetic form factors in a Dyson-Schwinger/Bethe-Salpeter approach

Diana Nicmorus, Gernot Eichmann, Reinhard Alkofer

We investigate the electromagnetic form factors of the Delta and the Omega baryons within the Poincare-covariant framework of Dyson-Schwinger and Bethe-Salpeter equations. The thre…

hep-ph2010★ 152 cited

Influence of vector interaction and Polyakov loop dynamics on inhomogeneous chiral symmetry breaking phases

Stefano Carignano, Dominik Nickel, Michael Buballa

We investigate the role of the isoscalar vector interaction and the dynamics of the Polyakov loop on inhomogeneous phases in the phase diagram of the two-flavor Nambu-Jona--Lasinio…

hep-ph2010★ 29 cited

Role of two-flavor color superconductor pairing in a three-flavor Nambu--Jona-Lasinio model with axial anomaly

Hannes Basler, Michael Buballa

The phase diagram of strongly interacting matter is studied within a three-flavor Nambu--Jona-Lasinio model, which contains the coupling between chiral and diquark condensates thro…

hep-ph2010★ 188 cited

Neutrinoless double beta decay in seesaw models

Mattias Blennow, Enrique Fernandez-Martinez, Jacobo Lopez-Pavon +1

We study the general phenomenology of neutrinoless double beta decay in seesaw models. In particular, we focus on the dependence of the neutrinoless double beta decay rate on the m…

hep-ph2010★ 108 cited

Chiral and deconfinement transition from correlation functions: SU(2) vs. SU(3)

Christian S. Fischer, Axel Maas, Jens A. Mueller

We study a gauge invariant order parameter for deconfinement and the chiral condensate in SU(2) and SU(3) Yang-Mills theory in the vicinity of the deconfinement phase transition us…

hep-ph2010★ 26 cited

The Quark Propagator in the NJL Model in a self-consistent 1/Nc Expansion

Daniel Müller, Michael Buballa, Jochen Wambach

The quark propagator is calculated in the Nambu-Jona-Lasinio (NJL) model in a self-consistent 1/Nc-expansion at next-to-leading order. The calculations are carried out iteratively…