Author(s): Alireza Behtash, Gerald V. Dunne, Thomas Schäfer, Tin Sulejmanpasic, and Mithat Ünsal
The fields and parameters in a path integral should be considered as complex quantities, even though they are real at the Lagrangian level, according to new calculations.
[Phys. Rev. Lett. 116, 011601] Published Wed Jan 06, 2016