1,721,142 research outputs found
Chromoelectric flux tubes in QCD
No full textCardaci MS, Cea P, Cosmai L, Falcone R, Papa A. Chromoelectric flux tubes in QCD. Physical Review D. 2011;83(1): 014502.We analyze the distribution of the chromoelectric field generated by a static quark-antiquark pair in the SU(3) vacuum and revisit previous results for SU(2). We find that the transverse profile of the flux tube resembles the dual version of the Abrikosov vortex field distribution. We give an estimate of the London penetration length of the chromoelectric field in the confined vacuum. We also speculate on the value of the ratio between the penetration lengths for SU(2) and SU(3) gauge theories
Gauge invariant study of the monopole condensation in non-Abelian lattice gauge theories
No full textWe investigate the Abelian monopole condensation in finite temperature SU(2) and SU(3) pure lattice gauge theories. To this end we introduce a gauge invariant disorder parameter built up in terms of the lattice Schrodinger functional. Our numerical results show that the disorder parameter is different from zero and Abelian monopoles condense in the confined phase. On the other hand, our numerical data suggest that the disorder parameter tends to zero, in the thermodynamic limit, when the gauge coupling constant approaches the critical deconfinement value. In the case of SU(3) we also compare the different kinds of Abelian monopoles which can be defined according to the choice of the Abelian subgroups
Abelian monopole and vortex condensation in lattice gauge theories
No full textWe study abelian monopole and vortex condensation in lattice pure gauge theories. Condensation is detected by means of a disorder parameter defined in terms of a gauge-invariant effective action introduced using the lattice Schrodinger functional. Dirac monopoles condense in the confined phase of U(1) lattice gauge theory. Abelian monopoles and abelian vortices condense in the confined phase of SU(2) and SU(3) lattice gauge theories
DUAL MEISSNER EFFECT AND STRING TENSION IN SU(2) LATTICE GAUGE-THEORY
No full textWe study the distribution of the color fields due to a static quark-antiquark pair in SU(2) lattice gauge theory. We find that the London penetration length measured after Abelian projection in the Abelian Covariant gauge (Maximal Abelian gauge) agrees with the one obtained without gauge fixing. We put out a simple relation between the penetration length and the string tension
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