We report updated results on the determination of Lee-Yang edge (LYE) singularities in Nf = 2+1 QCD using highly improved staggered quarks (HISQ) with physical masses on Nτ = 4, 6, 8 lattices. The singularity structure of QCD in the complex μB plane is probed using conserved charges calculated at imaginary μB. The location of the singularities is determined by studying the (uncancelled) poles of multi-point Padé approximants. We show that close to the Roberge-Weiss (RW) transition, the location of the LYE singularities scales according to the 3-d Z(2) universality class. By combining the new Nτ = 6 data with the Nτ = 4 data from our previous analysis we extract a rough estimate for the RW temperature in the continuum limit. We also discuss some preliminary results for the singularities close to the chiral phase transition obtained from simulations on Nτ = 6, 8 lattices.
Determination of Lee-Yang edge singularities in QCD by rational approximations / Zambello, K.; Clarke, D. A.; Dimopoulos, P.; Di Renzo, F.; Goswami, J.; Nicotra, G.; Schmidt, C.; Singh, S.. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - 430:(2023), pp. 164.164-1-164.164-10. (Intervento presentato al convegno 39th International Symposium on Lattice Field Theory, LATTICE 2022 tenutosi a Bonn (D) nel 8-13 agosto 2022) [10.22323/1.430.0164].
Determination of Lee-Yang edge singularities in QCD by rational approximations
Zambello K.;Dimopoulos P.;Di Renzo F.;Singh S.
2023-01-01
Abstract
We report updated results on the determination of Lee-Yang edge (LYE) singularities in Nf = 2+1 QCD using highly improved staggered quarks (HISQ) with physical masses on Nτ = 4, 6, 8 lattices. The singularity structure of QCD in the complex μB plane is probed using conserved charges calculated at imaginary μB. The location of the singularities is determined by studying the (uncancelled) poles of multi-point Padé approximants. We show that close to the Roberge-Weiss (RW) transition, the location of the LYE singularities scales according to the 3-d Z(2) universality class. By combining the new Nτ = 6 data with the Nτ = 4 data from our previous analysis we extract a rough estimate for the RW temperature in the continuum limit. We also discuss some preliminary results for the singularities close to the chiral phase transition obtained from simulations on Nτ = 6, 8 lattices.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
