ハドロン物理セミナーでは、気鋭の研究者に最近の研究のお話をしていただきます。

We invite spirited researchers as speakers of the Hadron Physics Seminar.

*  以下の時間は、UTC + 9である日本標準時（JST）です。

*  The schedule below is in terms of Japan Standard Time (JST), namely UTC +9.

Tue. April 23th

Quantitative precision in functional QCD and the prediction of its critical endpoint

Franz R. Sattler  (Heidelberg University)
Room 907 (16:00-18:00)

Abstract: I introduce work towards a prediction of the location of the conjectured critical endpoint of QCD by using the functional renormalization group.

This first-principles, non-perturbative method allows to access the high-density region of the QCD phase diagram, as it does not suffer from the sign problem of lattice QCD.

A short introduction to the functional renormalization group is given. Then, I systematically identify and explain how to include all relevant physical degrees of freedom within a truncation of the system.

I discuss both quantitative results in the vacuum as well as the extension to the phase diagram up to intermediate densities.

In particular, we obtain access to fully momentum-dependent quantities such as the euclidean propagators, which allows us e.g. to determine the pole mass of the pion and gives us access to the pion decay constant.

The quantitative reliablity of the calculation can be systematically investigated and systematic error estimates extracted.

Finally, for calculations at even higher densities, I discuss future extensions of our setup, such as other potentially relevant composite particles.