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SUMMARY:Universality driven analytic structure of QCD crossover
DTSTART;VALUE=DATE-TIME:20201111T153000Z
DTEND;VALUE=DATE-TIME:20201111T160000Z
DTSTAMP;VALUE=DATE-TIME:20230601T201216Z
UID:indico-contribution-232@indico.ihep.su
DESCRIPTION:Speakers: Vladimir Skokov (North Carolina State University / R
BRC BNL)\, Gregory Johnson ()\nRecent lattice QCD calculations show strong
indications that the chiral crossover of QCD at zero baryon chemical pote
ntial \\mu_B is a remnant of the second-order chiral phase transition. Fur
thermore\, the non-universal parameters needed to map temperature T and \\
mu_B to the universal properties of the second-order chiral phase transiti
on have been determined recently. Motivated by these observations\, first\
, we determine the analytic structure of the partition function -- the so-
called Yang-Lee edge singularity -- in the QCD crossover regime\, solely b
ased on universal properties. Next\, utilizing the lattice QCD results for
non-universal parameters we map this singularity to the real T and comple
x \\mu_B plane\, leading to the determination of the radius of convergence
in \\mu_B in the QCD crossover regime. These universality- and QCD-based
results provide tight constraints on the range of validity of the lattice
QCD calculations at \\mu_B>0. The implication of this result on the locati
on of the conjectured QCD critical point is discussed.\n\nhttps://indico.i
hep.su/event/563/contributions/232/
LOCATION:
URL:https://indico.ihep.su/event/563/contributions/232/
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