Speaker
Juan S. Cruz
(Technical University Munich)
Description
We derive correlation functions for massive fermions with a complex mass in the presence of a general vacuum angle. For this purpose, we first build the Green’s functions in the one-instanton background and then sum over the configurations of background instantons. The quantization of topological sectors follows for saddle points of finite Euclidean action in an infinite spacetime volume and the fluctuations about these. For the resulting correlation functions, we therefore take the infinite-volume limit before summing over topological sectors. In contrast to the opposite order of limits, the chiral phases from the mass terms and from the instanton effects come out to be aligned.
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Primary authors
Juan S. Cruz
(Technical University Munich)
Carlos Tamarit
(Technische Universität München)
Prof.
Björn Garbrecht
(TUM)
Dr
Wen-yuan Ai
( Université catholique de Louvain )
