8–13 Aug 2022
Hörsaalzentrum Poppelsdorf
Europe/Berlin timezone

Determination of Lee-Yang edge singularities in QCD by rational approximations

8 Aug 2022, 14:20
20m
CP1-HSZ/0.011 (CP1-HSZ) - HS1 (CP1-HSZ)

CP1-HSZ/0.011 (CP1-HSZ) - HS1

CP1-HSZ

450
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Oral Presentation QCD at Non-zero Density Non-zero Density

Speaker

Kevin Zambello (University of Pisa and INFN - Sezione di Pisa)

Description

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 Z2 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.

Primary authors

Kevin Zambello (University of Pisa and INFN - Sezione di Pisa) David Anthony Clarke (Bielefeld University) Jishnu Goswami (RIKEN Center for Computational Science) Guido Nicotra (University of Bielefeld) Christian Schmidt (Bielefeld University) Petros Dimopoulos (University of Parma & INFN) Francesco Di Renzo (Università di Parma and INFN) Simran Singh (University of Parma & INFN)

Presentation materials