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SUMMARY:O(4) scaling analysis in two-flavor QCD at finite temperature and
density with improved Wilson quarks
DTSTART;VALUE=DATE-TIME:20160726T190000Z
DTEND;VALUE=DATE-TIME:20160726T200000Z
DTSTAMP;VALUE=DATE-TIME:20190825T045318Z
UID:indico-contribution-2342@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Takashi UMEDA (Hiroshima Univ.)\nWe study scaling be
havior of a chiral order parameter in the low density\nregion\, performing
a simulation of two-flavor lattice QCD with improved\nWilson quarks. It h
ave been confirmed that the scaling behavior of the\nchiral order paramete
r defined by a Ward-Takahashi identity agrees with\nthe scaling function o
f the three-dimensional O(4) spin model at zero\nchemical potential. We di
scuss the scaling properties of the chiral\nphase transition at finite den
sity\, applying the reweighting method and\ncalculating derivatives of the
chiral order parameter with respect to\nthe chemical potential. In the co
mparison between the scaling functions\nof the O(4) spin model and QCD at
low density\, there is a fit parameter\nwhich can be interpreted as the cu
rvature of the chiral phase transition\ncurve in the QCD phase diagram wit
h respect to temperature and chemical\npotential. We determine the curvatu
re of the phase boundary by the\nfitting. The physical scale is set by the
gradient flow.\n\nhttps://conference.ippp.dur.ac.uk/event/470/contributio
ns/2342/
LOCATION:Highfield Campus\, University of Southampton
URL:https://conference.ippp.dur.ac.uk/event/470/contributions/2342/
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