Investigation of the $U_A(1)$ in high temperature QCD on the lattice - INSPIRE

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Investigation of the $U_A(1)$ in high temperature QCD on the lattice

Sayantan Sharma
(
- Bielefeld U.
)
,
Viktor Dick
(
- Bielefeld U.
)
,
Frithjof Karsch
(
- Bielefeld U. and
- Brookhaven
)
,
Edwin Laermann
(
- Bielefeld U.
)
,
Swagato Mukherjee
(
- Brookhaven
)

Nov 15, 2013

7 pages

Part of Proceedings, 31st International Symposium on Lattice Field Theory (Lattice 2013) : Mainz, Germany, July 29-August 3, 2013, 164

Published in:

PoS LATTICE2013 (2014) 164

Contribution to:

- Lattice 2013
, 164

Published: 2014

e-Print:

1311.3943 [hep-lat]

DOI:

10.22323/1.187.0164

View in:

ADS Abstract Service

reference search16 citations

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Abstract: (arXiv)

In this project we study the effect of the

U_A(1)

anomaly for (2+1)-flavour QCD at high temperature. We apply the overlap operator as a tool to probe the topological properties of gauge field configurations which have been generated within the Highly Improved Staggered Quark (HISQ) discretization scheme on lattices of size

32^3\times 8

with

m_l/m_s=1/20

, commonly used for the study of QCD thermodynamics. Although we have at present, only results for one value of the quark masses and thus cannot monitor the change of the eigenvalue distributions with the light quark mass, the distribution of the low-lying eigenvalues of the overlap operator suggests that the

U_A(1)

is not restored effectively even at 1.5 times the pseudo critical temperature. The corresponding low-lying eigenmodes show localization properties.

Note:

Presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), 29 July - 3 August 2013, Mainz, Germany

temperature: high
operator: overlap
quantum chromodynamics: thermodynamics
quark: staggered
quark: flavor: 3
quantum chromodynamics: lattice
anomaly: U(1)
anomaly: axial
critical phenomena
gauge field theory: SU(3)

References(18)

Figures(10)

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