TY - JOUR

T1 - Practical approach to the sign problem at finite theta-vacuum angle

AU - Sasaki, Takahiro

AU - Kouno, Hiroaki

AU - Yahiro, Masanobu

N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant No. 23-2790.

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

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M3 - Conference article

AN - SCOPUS:84976277172

VL - 29-July-2013

JO - Proceedings of Science

JF - Proceedings of Science

SN - 1824-8039

M1 - 137

T2 - 31st International Symposium on Lattice Field Theory, LATTICE 2013

Y2 - 29 July 2013 through 3 August 2013

ER -