A practical solution to the sign problem at finite theta-vacuum angle
High Energy Physics - Phenomenology
2013-03-14 v1 High Energy Physics - Lattice
Nuclear Theory
Abstract
We propose a practical way of circumventing the sign problem in lattice QCD simulations with a theta-vacuum term. This method is 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 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.
Keywords
Cite
@article{arxiv.1208.0375,
title = {A practical solution to the sign problem at finite theta-vacuum angle},
author = {Takahiro Sasaki and Hiroaki Kouno and Masanobu Yahiro},
journal= {arXiv preprint arXiv:1208.0375},
year = {2013}
}
Comments
5 pages, 6 figures