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

Sharma S, Dick V, Karsch F, Laermann E, Mukherjee S (2014)
Presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), Mainz, Germany.

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Abstract
In this project we study the effect of the UA(1) anomaly for (2+1)-flavourQCD at high temperature. We apply the overlap operator as a tool to probe thetopological properties of gauge field configurations which have been generatedwithin the Highly Improved Staggered Quark (HISQ) discretization scheme onlattices of size $32^3\times 8$ with $m_l/m_s=1/20$, commonly used for thestudy of QCD thermodynamics. Although we have at present, only results for onevalue of the quark masses and thus cannot monitor the change of the eigenvaluedistributions with the light quark mass, the distribution of the low-lyingeigenvalues of the overlap operator suggests that the $U_A(1)$ is not restoredeffectively even at 1.5 times the pseudo critical temperature. Thecorresponding low-lying eigenmodes show localization properties.
Publishing Year
Conference
31st International Symposium on Lattice Field Theory (Lattice 2013)
Location
Mainz, Germany
Conference Date
2013-07-29 – 2013-08-03
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Sharma S, Dick V, Karsch F, Laermann E, Mukherjee S. Investigation of the UA(1) in high temperature QCD on the lattice. Presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), Mainz, Germany.
Sharma, S., Dick, V., Karsch, F., Laermann, E., & Mukherjee, S. (2014). Investigation of the UA(1) in high temperature QCD on the lattice. Presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), Mainz, Germany
Sharma, S., Dick, V., Karsch, F., Laermann, E., and Mukherjee, S. (2014).“Investigation of the UA(1) in high temperature QCD on the lattice”. Presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), Mainz, Germany.
Sharma, S., et al., 2014. Investigation of the UA(1) in high temperature QCD on the lattice. Presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), Mainz, Germany.
S. Sharma, et al., “Investigation of the UA(1) in high temperature QCD on the lattice”, Presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), Mainz, Germany, 2014.
Sharma, S., Dick, V., Karsch, F., Laermann, E., Mukherjee, S.: Investigation of the UA(1) in high temperature QCD on the lattice. Presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), Mainz, Germany (2014).
Sharma, Sayantan, Dick, Viktor, Karsch, Frithjof, Laermann, Edwin, and Mukherjee, Swagato. “Investigation of the UA(1) in high temperature QCD on the lattice”. Presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), Mainz, Germany, 2014.
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