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SUMMARY:QCD Chiral Crossover Line from Lee--Yang Edge Singularities
DTSTART;VALUE=DATE-TIME:20261010T090000Z
DTEND;VALUE=DATE-TIME:20261010T091500Z
DTSTAMP;VALUE=DATE-TIME:20261005T092223Z
UID:indico-contribution-2841@indico.itp.ac.cn
DESCRIPTION:Speakers: 凯帆 叶 (Central China Normal University\, Instit
 ute of Particle Physics)\nWe propose a universality-based reconstruction o
 f the QCD chiral crossover line from Lee--Yang edge singularities in the c
 omplex baryon chemical potential plane[1]. The framework maps lattice-extr
 acted complex Lee--Yang-zero estimates\, treated as proxies for edge singu
 larities\, to the universal chiral Lee--Yang edge and thereby determines t
 he $\\mu_B$ dependence of both the chiral critical line in the light-quark
  chiral limit and the pseudo-critical crossover line at physical quark mas
 ses. As an illustration\, we apply the framework to Lee--Yang-zero estimat
 es recently obtained by the Wuppertal--Budapest collaboration from high-st
 atistics lattice QCD simulations. Without imposing the previously determin
 ed small-$\\mu_B$ expansion of the crossover line as input\, the reconstru
 cted curvature is consistent with existing continuum lattice-QCD results a
 t small $\\mu_B$. The fitted chiral-limit transition temperature is also c
 ompatible with existing chiral-scaling analyses. These results demonstrate
  that lattice information on Lee--Yang singularities\, combined with unive
 rsal chiral scaling\, provides a quantitatively consistent constraint on t
 he QCD crossover line within the present temperature window and establishe
 s a framework that can be systematically improved with future Lee--Yang-ze
 ro determinations.\n\n[1] H.-T. Ding\, S. Mukherjee\, P. Petreczky\, and K
 .-F. Ye\, QCD Chiral Crossover Line from Lee-Yang Edge Singularities\, arX
 iv:2608.05752 [hep-lat] (2026).\n\nhttps://indico.itp.ac.cn/event/437/cont
 ributions/2841/
LOCATION:会议楼2 CXII102
URL:https://indico.itp.ac.cn/event/437/contributions/2841/
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