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.
|Journal||Proceedings of Science|
|Publication status||Published - Jan 1 2013|
|Event||31st International Symposium on Lattice Field Theory, LATTICE 2013 - Mainz, Germany|
Duration: Jul 29 2013 → Aug 3 2013
All Science Journal Classification (ASJC) codes