Flux Tube Profiles at High Temperature

摘要

In this work we have studied gluon field distributions around a static q pair at high temperature by means of lattice simulations of Quantum Chromodynamics in the quenched approximation. Measuring the electric and magnetic components of the gluon field at temperatures close to the critical temperature of the phase transition from the confined to the deconfined phase of QCD, we were able to see how longitudinal and transverse profiles of the flux tube between the static qq pair change with temperature. The parallel electric field component turned out to be larger than the other three field components, which are approximately equal, at all a fixed constant separation and temperatures. This tells us that, as at zero temq perature, the force that comes from the field strength that is oriented along the axis connecting the pair and trying to bind aq quark and an antiquark together is chromo-electric. By exploring the temperature dependence of the longitudinal profiles we were able to show that the field strength distribution approaches the one of a single isolated quark when the rising temperature approaches the critical temperature. From the transverse profiles at various temperatures we further have found that the physical width of the flux tube decreases when the temperature increases.