24-30 July 2016
Highfield Campus, University of Southampton
Europe/London timezone

O(4) scaling analysis in two-flavor QCD at finite temperature and density with improved Wilson quarks

26 Jul 2016, 20:00
1h
Highfield Campus, University of Southampton

Highfield Campus, University of Southampton

Highfield Campus, Southampton SO17 1BJ, UK
Poster Nonzero Temperature and Density Poster

Speaker

Dr Takashi UMEDA (Hiroshima Univ.)

Description

We study scaling behavior of a chiral order parameter in the low density region, performing a simulation of two-flavor lattice QCD with improved Wilson quarks. It have been confirmed that the scaling behavior of the chiral order parameter defined by a Ward-Takahashi identity agrees with the scaling function of the three-dimensional O(4) spin model at zero chemical potential. We discuss the scaling properties of the chiral phase transition at finite density, applying the reweighting method and calculating derivatives of the chiral order parameter with respect to the chemical potential. In the comparison between the scaling functions of the O(4) spin model and QCD at low density, there is a fit parameter which can be interpreted as the curvature of the chiral phase transition curve in the QCD phase diagram with respect to temperature and chemical potential. We determine the curvature of the phase boundary by the fitting. The physical scale is set by the gradient flow.

Primary author

Dr Takashi UMEDA (Hiroshima Univ.)

Co-authors

Mr Atsushi Uji (Niigata University) Dr Hiroshi Ohno (University of Tsukuba) Prof. Kazuyuki Kanaya (CiRfSE, Univ. Tsukuba) Mr Naoki Wakabayashi (Niigata University) Mr Ryo Iwami (Niigata University) Dr Shinji Ejiri (Niigata University) Dr Shinsuke Yoshida (Central China Normal Univ.)

Presentation Materials

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