Lee-Yang edge singularities in 2+1 flavor QCD with imaginary chemical potential. - INSPIRE

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Lee-Yang edge singularities in 2+1 flavor QCD with imaginary chemical potential.

Nov 10, 2021

8 pages

Published in:

PoS LATTICE2021 (2022) 260

Contribution to:

- Lattice 2021
, 260
,
- Lattice 2021

Published: May 16, 2022

e-Print:

2111.05630 [hep-lat]

DOI:

10.22323/1.396.0260

View in:

ADS Abstract Service

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Abstract: (SISSA)

We present results of the location of the closest singularities in the complex chemical potential plane using a novel method. These results are obtained with (2+1)-flavor of highly improved staggered quarks (HISQ) on lattices with temporal extent of Nt=4,6. We show that the scaling is consistent with the expected scaling of the Lee-Yang edge singularities in the vicinity of the Roberge-Weiss (RW) transition. We determine various non-universal parameters using 3D Ising model scaling functions that map QCD in the scaling region of the RW transition. Furthermore, as a preliminary result we discuss how the Lee-Yang edge singularity can be used to probe the chiral phase transition in QCD. The singularity obtained close to the chiral phase transition temperature Tc seems to be in agreement with the expected scaling of the Lee-Yang edge singularity. As an outlook, we discuss the scaling of the Lee-Yang edge singularity in the vicinity of a possible critical end point in QCD, at even lower temperatures. In the future, such a scaling analysis might hint on the existence and the location of the critical end point. The work presented here is a part of an ongoing project of Bielefeld Parma joint collaboration.

Note:

8 pages and 6 figures. Contribution to the 38th international Lattice conference 2021, 26-30 July 2021, online Zoom/Gather @ MIT, USA

potential: chemical
critical phenomena: chiral
flavor: 3
critical phenomena: temperature
quark: staggered
scaling
singularity
quantum chromodynamics
lattice
Ising model

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