Meson mass and the sign problem at finite theta

Takahiro Sasaki, Hiroaki Kouno, Masanobu Yahiro

Research output: Contribution to journalConference articlepeer-review


We propose a practical way of circumventing the sign problem in lattice QCD simulations with the theta-vacuum term. This method is the reweighting method for 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 out a good reference system in the reweighting method, we estimate the average reweighting factor by using the two-flavor NJL model and eventually find a good reference system.

Original languageEnglish
Article number012031
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2013
Event10th Extreme QCD 2012, xQCD 2012 - Washington, DC, United States
Duration: Aug 21 2012Aug 23 2012

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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