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What the Infrared Behavior of QCD . . .
"... In this talk I review aspects of confinement in the covariant and local description of QCD and discuss to what extend our present knowledge about the infrared behavior of QCD Green functions can support this description. Emphasized are in particular: the positivity violations of transverse gluon ..."
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In this talk I review aspects of confinement in the covariant and local description of QCD and discuss to what extend our present knowledge about the infrared behavior of QCD Green functions can support this description. Emphasized are in particular: the positivity violations of transverse gluon
Infrared behavior of threepoint . . .
, 2008
"... The threegluon and ghostgluon vertices of Landau gauge YangMills theory are investigated in the low momentum regime. Due to ghost dominance in the infrared we can use the known power law behavior for the propagators to determine analytically the complete momentum dependence of the dressing functi ..."
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The threegluon and ghostgluon vertices of Landau gauge YangMills theory are investigated in the low momentum regime. Due to ghost dominance in the infrared we can use the known power law behavior for the propagators to determine analytically the complete momentum dependence of the dressing
Computer Vision
, 1982
"... Driver inattention is one of the main causes of traffic accidents. Monitoring a driver to detect inattention is a complex problem that involves physiological and behavioral elements. Different approaches have been made, and among them Computer Vision has the potential of monitoring the person behind ..."
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Cited by 1041 (11 self)
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Driver inattention is one of the main causes of traffic accidents. Monitoring a driver to detect inattention is a complex problem that involves physiological and behavioral elements. Different approaches have been made, and among them Computer Vision has the potential of monitoring the person
The Infrared Behavior of QCD Propagators in Landau Gauge ∗
, 2000
"... Some features of the solutions to the truncated DysonSchwinger equations(DSEs) for the propagators of QCD in Landau gauge are summarized. In particular, the KugoOjima confinement criterion is realized, and positivity of transverse gluons is manifestly violated in these solutions. In Landau gauge, ..."
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to escape the cluster decomposition of colored clusters. The gluon and ghost propagators, and the nonperturbative running coupling, are compared to recent lattice simulations. A significant deviation of the running coupling from the infrared behavior extracted in simulations of 3point functions
Infrared behavior of gravitongraviton scattering
, 2008
"... The quantum effective theory of general relativity, independent of the eventual full theory at high energy, expresses gravitongraviton scattering at one loop order O ( E4) with only one parameter, Newton’s constant. Dunbar and Norridge have calculated the one loop amplitude using string based techn ..."
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Cited by 12 (0 self)
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techniques. We complete the calculation by showing that the 1 d−4 divergence which remains in their result comes from the infrared sector and that the cross section is finite and model independent when the usual bremsstrahlung diagrams are included. 1
The role of zero modes for the infrared behavior of QCD
, 1994
"... We analyse the mechanism in which zero modes lead to an elimination of fermionic color non–singlet states in 1+1 dimensions. Using a hamiltonian lattice formulation we clarify the physical meaning of the zero modes but we do not find support for speculations on the crucial importance of lower dimens ..."
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dimensional fields (zero modes in 1+1 dimension) for the infrared behavior of QCD in 2+1 or higher dimensions. 1
The Infrared Behavior of QCD Propagators in Landau Gauge
, 2000
"... Some features of the solutions to the truncated DysonSchwinger equations(DSEs) for the propagators of QCD in Landau gauge are summarized. In particular, the KugoOjima confinement criterion is realized, and positivity of transverse gluons is manifestly violated in these solutions. In Landau gauge, ..."
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Cited by 1 (0 self)
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to escape the cluster decomposition of colored clusters. The gluon and ghost propagators, and the nonperturbative running coupling, are compared to recent lattice simulations. A significant deviation of the running coupling from the infrared behavior extracted in simulations of 3point functions
Topological charge screening and the infrared behavior of the instanton density
, 2006
"... A new mechanism for suppression of the instanton density in the infrared is considered. This mechanism is based on the phenomenon of topological charge screening, which leads to an effective cutoff in the contribution of large instantons. 1 ..."
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A new mechanism for suppression of the instanton density in the infrared is considered. This mechanism is based on the phenomenon of topological charge screening, which leads to an effective cutoff in the contribution of large instantons. 1
Infrared behavior of QCD from the DysonSchwinger formalism
, 2008
"... We discuss the properties of two different types of infrared solutions of Landau gauge YangMills theory and argue for one of these (the ’scaling solution’). We furthermore clarify the status of previously obtained results from DSEs on a fourtorus. Including quarks we discuss a relation between con ..."
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We discuss the properties of two different types of infrared solutions of Landau gauge YangMills theory and argue for one of these (the ’scaling solution’). We furthermore clarify the status of previously obtained results from DSEs on a fourtorus. Including quarks we discuss a relation between
Infrared Behavior of the Gluon Propagator in Lattice Landau Gauge
, 1997
"... We evaluate numerically the fourmomentumspace gluon propagator in lattice Landau gauge, for pure SU(2) lattice gauge theory with periodic boundary conditions. Simulations are done in the strongcoupling regime, namely at β = 0,0.8,1.2 and 1.6, and for lattice sizes up to 30 4,16 4, 20 4 and 24 4 r ..."
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respectively. In the limit of large lattice volume, we observe in all cases a gluon propagator decreasing as the momentum goes to zero. This counterintuitive result has a straightforward interpretation as resulting from the proximity of the socalled first Gribov horizon in infrared directions.
Results 1  10
of
1,588