Heavy quark potential and jet quenching parameter in a D-instanton background

Abstract

Using the AdS/CFT correspondence, we study the heavy quark potential and the jet quenching parameter in the near horizon limit of D3-D(-1) background. The results are compared with those of conformal cases. It is shown that the presence of instantons tends to suppress the heavy quark potential and enhance the jet quenching parameter.

Effect of gluon condensate on jet quenching parameter and drag force

“…In other words, the inclusion of the gluon condensation enhances the jet quenching parameter. Interestingly, it was argued [29] that the D-instanton density (closely related to the chiral condensation and the gluon condensation) also enhances the jet quenching parameter.…”

“…Also, this parameter has been addressed in some AdS/QCD models [20,21]. For related results, see [22][23][24][25][26][27][28][29][30].…”

Imaginary potential of moving quarkonia in a D-instanton background

“…Thus, one expects that the results obtained from this theory should shed qualitative insights into analogous questions in QCD. Due to this characteristic, many quantities have been studied in the D-instanton background, such as phase transitions [32], flavor quark [33], heavy quark potential and jet quenching parameter [34].…”

Drag force in a D-instanton background

“…It is shown that the presence of the D-instanton density tends to increase the drag force and decrease the diffusion coefficient, reverse to the effects of the velocity and the temperature. Interestingly, it was argued that [29] the D-instanton density enhances the jet quenching parameter. Thus, one concludes that the effects of D-instanton density on the drag force and the jet quenching parameter are consistent.…”