### Abstract

We investigate a way of circumventing the sign problem in lattice QCD simulations with a theta-vacuum term, using the Polyakov-loop extended Nambu-Jona-Lasinio model. We consider the reweighting method for the QCD Lagrangian after the U_{A}(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 Polyakov-loop extended Nambu-Jona-Lasinio model and eventually find a good reference system.

Original language | English |
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Article number | 056003 |

Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |

Volume | 87 |

Issue number | 5 |

DOIs | |

Publication status | Published - Mar 8 2013 |

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### All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)

### Cite this

*Physical Review D - Particles, Fields, Gravitation and Cosmology*,

*87*(5), [056003]. https://doi.org/10.1103/PhysRevD.87.056003

**Practical approach to the sign problem at finite theta-vacuum angle.** / Sasaki, Takahiro; Kouno, Hiroaki; Yahiro, Masanobu.

Research output: Contribution to journal › Article

*Physical Review D - Particles, Fields, Gravitation and Cosmology*, vol. 87, no. 5, 056003. https://doi.org/10.1103/PhysRevD.87.056003

}

TY - JOUR

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

AU - Sasaki, Takahiro

AU - Kouno, Hiroaki

AU - Yahiro, Masanobu

PY - 2013/3/8

Y1 - 2013/3/8

N2 - We investigate a way of circumventing the sign problem in lattice QCD simulations with a theta-vacuum term, using the Polyakov-loop extended Nambu-Jona-Lasinio 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 Polyakov-loop extended Nambu-Jona-Lasinio model and eventually find a good reference system.

AB - We investigate a way of circumventing the sign problem in lattice QCD simulations with a theta-vacuum term, using the Polyakov-loop extended Nambu-Jona-Lasinio 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 Polyakov-loop extended Nambu-Jona-Lasinio model and eventually find a good reference system.

UR - http://www.scopus.com/inward/record.url?scp=84875153421&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84875153421&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.87.056003

DO - 10.1103/PhysRevD.87.056003

M3 - Article

VL - 87

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 5

M1 - 056003

ER -