Meson mass and the sign problem at finite theta

Takahiro Sasaki; Hiroaki Kouno; Masanobu Yahiro

doi:10.1088/1742-6596/432/1/012031

Meson mass and the sign problem at finite theta

Takahiro Sasaki, Hiroaki Kouno, Masanobu Yahiro

Experimental Particle Physics

Research output: Contribution to journal › Conference article › peer-review

Abstract

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 language	English
Article number	012031
Journal	Journal of Physics: Conference Series
Volume	432
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/432/1/012031
Publication status	Published - 2013
Event	10th Extreme QCD 2012, xQCD 2012 - Washington, DC, United States Duration: Aug 21 2012 → Aug 23 2012

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1088/1742-6596/432/1/012031

Cite this

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title = "Meson mass and the sign problem at finite theta",

abstract = "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.",

author = "Takahiro Sasaki and Hiroaki Kouno and Masanobu Yahiro",

year = "2013",

doi = "10.1088/1742-6596/432/1/012031",

language = "English",

volume = "432",

journal = "Journal of Physics: Conference Series",

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number = "1",

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T1 - Meson mass and the sign problem at finite theta

AU - Sasaki, Takahiro

AU - Kouno, Hiroaki

AU - Yahiro, Masanobu

PY - 2013

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N2 - 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.

AB - 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.

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U2 - 10.1088/1742-6596/432/1/012031

DO - 10.1088/1742-6596/432/1/012031

M3 - Conference article

AN - SCOPUS:84879996511

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VL - 432

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - 1

M1 - 012031

T2 - 10th Extreme QCD 2012, xQCD 2012

Y2 - 21 August 2012 through 23 August 2012

ER -

Meson mass and the sign problem at finite theta

Abstract

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