Speaker
Markus Huber
(Giessen University)
Description
The last two decades have seen much progress in the calculation of quark and gluon correlation functions using functional methods and in their application to the calculation of hadronic observables. A tantalizing question is that of the systematic error inherent in such methods which is closely related to the stability of the employed truncations with respect to extensions. In this contribution, I will discuss this for the spectrum of glueballs in pure gauge theory calculated from the 3PI effective action. First, its equations of motion are discussed with respect to extensions and in comparison to other methods. Second, I show results for the impact of different truncations of the bound state equations on the masses of several glueballs.
Author
Markus Huber
(Giessen University)
