QCD transition at the physical point, and its scaling window from twisted mass Wilson fermions

We study the scaling properties of the finite temperature QCD phase transition, for light quark masses ranging from the heavy quark regime to their physical values. The lattice results are obtained in the fixed scale approach from simulations of Nf=2+1+1 flavours of Wilson fermions at maximal twist....

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Autores principales:	Andrey Yu. Kotov, Maria Paola Lombardo, Anton Trunin
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/a134da967e9045c88d63ff3db2c3b681
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spelling	oai:doaj.org-article:a134da967e9045c88d63ff3db2c3b6812021-12-04T04:32:33ZQCD transition at the physical point, and its scaling window from twisted mass Wilson fermions0370-269310.1016/j.physletb.2021.136749https://doaj.org/article/a134da967e9045c88d63ff3db2c3b6812021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0370269321006894https://doaj.org/toc/0370-2693We study the scaling properties of the finite temperature QCD phase transition, for light quark masses ranging from the heavy quark regime to their physical values. The lattice results are obtained in the fixed scale approach from simulations of Nf=2+1+1 flavours of Wilson fermions at maximal twist. We identify an order parameter free from the linear contributions in mass due to additive renormalization and regular terms in the Equation of State, which proves useful for the assessment of the hypothesized universal behaviour. We find compatibility with the 3D O(4) universality class for the physical pion mass and temperatures 120 MeV ≲T≲300 MeV. We discuss violation of scaling at larger masses and a possible cross-over to mean field behaviour. The chiral extrapolation T0=134−4+6 MeV of the pseudocritical temperature is robust against predictions of different universality classes and consistent with its estimate from the O(4) Equation of State for the physical pion mass.Andrey Yu. KotovMaria Paola LombardoAnton TruninElsevierarticlePhysicsQC1-999ENPhysics Letters B, Vol 823, Iss , Pp 136749- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Andrey Yu. Kotov Maria Paola Lombardo Anton Trunin QCD transition at the physical point, and its scaling window from twisted mass Wilson fermions
description	We study the scaling properties of the finite temperature QCD phase transition, for light quark masses ranging from the heavy quark regime to their physical values. The lattice results are obtained in the fixed scale approach from simulations of Nf=2+1+1 flavours of Wilson fermions at maximal twist. We identify an order parameter free from the linear contributions in mass due to additive renormalization and regular terms in the Equation of State, which proves useful for the assessment of the hypothesized universal behaviour. We find compatibility with the 3D O(4) universality class for the physical pion mass and temperatures 120 MeV ≲T≲300 MeV. We discuss violation of scaling at larger masses and a possible cross-over to mean field behaviour. The chiral extrapolation T0=134−4+6 MeV of the pseudocritical temperature is robust against predictions of different universality classes and consistent with its estimate from the O(4) Equation of State for the physical pion mass.
format	article
author	Andrey Yu. Kotov Maria Paola Lombardo Anton Trunin
author_facet	Andrey Yu. Kotov Maria Paola Lombardo Anton Trunin
author_sort	Andrey Yu. Kotov
title	QCD transition at the physical point, and its scaling window from twisted mass Wilson fermions
title_short	QCD transition at the physical point, and its scaling window from twisted mass Wilson fermions
title_full	QCD transition at the physical point, and its scaling window from twisted mass Wilson fermions
title_fullStr	QCD transition at the physical point, and its scaling window from twisted mass Wilson fermions
title_full_unstemmed	QCD transition at the physical point, and its scaling window from twisted mass Wilson fermions
title_sort	qcd transition at the physical point, and its scaling window from twisted mass wilson fermions
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/a134da967e9045c88d63ff3db2c3b681
work_keys_str_mv	AT andreyyukotov qcdtransitionatthephysicalpointanditsscalingwindowfromtwistedmasswilsonfermions AT mariapaolalombardo qcdtransitionatthephysicalpointanditsscalingwindowfromtwistedmasswilsonfermions AT antontrunin qcdtransitionatthephysicalpointanditsscalingwindowfromtwistedmasswilsonfermions
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QCD transition at the physical point, and its scaling window from twisted mass Wilson fermions

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