Practical approach to the sign problem at finite theta-vacuum angle

Takahiro Sasaki, Hiroaki Kouno, Masanobu Yahiro

Research output: Contribution to journalConference articlepeer-review


We investigate a way of circumventing the sign problem in lattice QCD simulations with a thetavacuum term, using the Polyakov-loop extended Nambu-Jona-Lasinio (PNJL) model. We consider the reweighting method for the QCD Lagrangian after the UA(1) transformation. In the Lagrangian, the P-odd mass term as a cause of the sign problem is minimized. In order to find a good reference system in the reweighting method, we estimate the average reweighting factor by using the two-flavor PNJL model and eventually find a good reference system.

Original languageEnglish
Article number137
JournalProceedings of Science
Publication statusPublished - 2013
Event31st International Symposium on Lattice Field Theory, LATTICE 2013 - Mainz, Germany
Duration: Jul 29 2013Aug 3 2013

All Science Journal Classification (ASJC) codes

  • General


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