Speaker
Description
The recently developed renormalization group improved optimized perturbation theory (RGOPT) is applied to QCD at zero temperatures and finite densities. The pressure for cold and dense quark matter is calculated as a first application of this technique to QCD in the presence of a control parameter. At leading order a non-perturbative and completely scale invariant result is found. At next-to leading order the RGOPT shows a very good agreement with the state of the art higher order perturbative results. Also, at this two loop order the RGOPT results are less sensitive to the variations of the renormalization scale than the ones obtained with perturbative QCD. Our results indicate that this non perturbative approximation is a robust alternative to treat QCD in the regime of high baryonic densities, which is currently unavailable to lattice simulations.
| Topic | Fundamental Interactions |
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