### 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 |
---|---|

Article number | 056003 |

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

Volume | 87 |

Issue number | 5 |

DOIs | |

Publication status | Published - Mar 8 2013 |

### All Science Journal Classification (ASJC) codes

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

## Fingerprint Dive into the research topics of 'Practical approach to the sign problem at finite theta-vacuum angle'. Together they form a unique fingerprint.

## Cite this

Sasaki, T., Kouno, H., & Yahiro, M. (2013). Practical approach to the sign problem at finite theta-vacuum angle.

*Physical Review D - Particles, Fields, Gravitation and Cosmology*,*87*(5), [056003]. https://doi.org/10.1103/PhysRevD.87.056003