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SUMMARY:Extruction of nontrivial correlation between chiral and deconfinem
ent transitions from two-color QCD at imaginary chemical potential
DTSTART;VALUE=DATE-TIME:20120816T200000Z
DTEND;VALUE=DATE-TIME:20120816T220000Z
DTSTAMP;VALUE=DATE-TIME:20200408T190659Z
UID:indico-contribution-308389@indico.cern.ch
DESCRIPTION:Speakers: Kouji Kashiwa (RIKEN BNL Research Center)\nWe invest
igate the nontrivial correlation between the chiral and deconfinement tran
sition in the two-color QCD.\nTo extract the information\, the imaginary
chemical potential is taken into account.\nAt $\\theta = \\pi/2$ where $\\
theta$ is the imaginary chemical potential divided by the temperature\, th
ere is the exact nontrivial center symmetry which is the $Z_2$ symmetry an
d this symmetry can be spontaneously broken.\nThis behavior is quite diffe
rent form the three-color QCD because the nontrivial center symmetry is al
ways broken by the quark degree of freedom\nin the three-color QCD.\nThis
means that we can investigate the nontrivial correlation between the chira
l and deconfinement transitions in the two-color system clearly than that
in the three-color system.\nSuch nontrivial correlation is very important
to construct the effective model of QCD and thus we can expect that severa
l important model constraints are obtained from the two-color QCD analysis
.\nIn this study\, we mainly pay attention to the behavior of the Roberge-
Weiss (RW) endpoint which appears at $\\theta=\\pi/2$ in the tho-color sys
tem.\nWe show that the RW endpoint is second-order if the nontrivial corre
lation is weak\, but it turn into first-order when the nontrivial correlat
ion is sufficiently strong.\n\nhttps://indico.cern.ch/event/181055/contrib
utions/308389/
LOCATION: Regency 1/3 and Ambassador
URL:https://indico.cern.ch/event/181055/contributions/308389/
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