S. D. Katz
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View article: Continuum-extrapolated high-order baryon fluctuations
Continuum-extrapolated high-order baryon fluctuations Open
Fluctuations play a key role in the study of QCD phases. Lattice QCD is a valuable tool to calculate them, but going to high orders is challenging. Up to the fourth order, continuum results have been available since 2015. We present the fi…
View article: Can rooted staggered fermions describe nonzero baryon density at low temperatures?
Can rooted staggered fermions describe nonzero baryon density at low temperatures? Open
Research on the quantum chromodynamics (QCD) phase diagram with lattice field theory methods is dominated by the use of rooted staggered fermions, as they are the computationally cheapest discretization available. We show that rooted stagg…
View article: The crossover line in the $(T, μ)$-phase diagram of QCD
The crossover line in the $(T, μ)$-phase diagram of QCD Open
An efficient way to study the QCD phase diagram at small finite density is to extrapolate thermodynamical observables from imaginary chemical potential. The phase diagram features a crossover line starting from the transition temperature a…
View article: Equation of state of a hot-and-dense quark gluon plasma: Lattice simulations at real <i>μ<sub>B</sub></i> vs. extrapolations
Equation of state of a hot-and-dense quark gluon plasma: Lattice simulations at real <i>μ<sub>B</sub></i> vs. extrapolations Open
The equation of state of the quark gluon plasma is a key ingredient of heavy ion phenomenology. In addition to the traditional Taylor method, several novel approximation schemes have been proposed with the aim of calculating it at finite b…
View article: Staggered rooting and unphysical phases at finite baryon density
Staggered rooting and unphysical phases at finite baryon density Open
Research on the QCD phase diagram with lattice field theory methods is dominated by the use of rooted staggered fermions, as they are the computationally cheapest discretization available. We show that rooted staggered fermions at a nonzer…
View article: Continuum extrapolated high order baryon fluctuations
Continuum extrapolated high order baryon fluctuations Open
Fluctuations play a key role in the study of QCD phases. Lattice QCD is a valuable tool to calculate them, but going to high orders is challenging. Up to the fourth order, continuum results are available since 2015. We present the first co…
View article: Can rooted staggered fermions describe nonzero baryon density at low temperatures?
Can rooted staggered fermions describe nonzero baryon density at low temperatures? Open
Research on the QCD phase diagram with lattice field theory methods is dominated by the use of rooted staggered fermions, as they are the computationally cheapest discretization available. We show that rooted staggered fermions at a nonzer…
View article: Resummed lattice QCD equation of state at finite baryon density: strangeness neutrality and beyond
Resummed lattice QCD equation of state at finite baryon density: strangeness neutrality and beyond Open
We calculate a resummed equation of state with lattice QCD simulations at imaginary chemical potentials, generalizing the scheme introduced in our previous work to the case of non-zero $\\mu_S$ , and focusing on the line of strangeness neu…
View article: Exponential improvement of the sign problem via contour deformations in the 2+1D XY model at non-zero density
Exponential improvement of the sign problem via contour deformations in the 2+1D XY model at non-zero density Open
We studied the 2+1 dimensional XY model at nonzero chemical potential on deformed integration manifolds with the aim of alleviating\nits sign problem. We investigated several proposals for the deformations and managed to considerably impro…
View article: Exponential reduction of the sign problem at finite density in the 2+1D XY model via contour deformations
Exponential reduction of the sign problem at finite density in the 2+1D XY model via contour deformations Open
We study the 2+1 dimensional XY model at nonzero chemical potential $\mu$ on deformed integration manifolds, with the aim of alleviating its sign problem. We investigate several proposals for the deformations, and considerably improve on t…
View article: Equation of state of a hot-and-dense quark gluon plasma: lattice simulations at real $μ_B$ vs. extrapolations
Equation of state of a hot-and-dense quark gluon plasma: lattice simulations at real $μ_B$ vs. extrapolations Open
The equation of state of the quark gluon plasma is a key ingredient of heavy ion phenomenology. In addition to the traditional Taylor method, several novel approximation schemes have been proposed with the aim of calculating it at finite b…
View article: Lattice simulations of the QCD chiral transition at real $\mu_B$
Lattice simulations of the QCD chiral transition at real $\mu_B$ Open
Most lattice studies of hot and dense QCD matter rely on extrapolation from zero or imaginary chemical potentials. The ill-posedness of numerical analytic continuation puts severe limitations on the reliability of such methods. We studied …
View article: High precision scale setting on the lattice
High precision scale setting on the lattice Open
Recently, the hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon was determined by the BMW collaboration with sub-percent precision. Such a precision requires to control many sources of uncertainty. One …
View article: Quantifying corrections to the hadron resonance gas with lattice QCD
Quantifying corrections to the hadron resonance gas with lattice QCD Open
The hadron resonance gas (HRG) model and its extensions are often used to describe the hadronic phase of strongly interacting matter. In our work we use lattice-QCD simulations with temporal extents of $N_\\tau=8,10$ and $12$ to quantify c…
View article: Muon g-2: BMW calculation of the hadronic vacuum polarization contribution
Muon g-2: BMW calculation of the hadronic vacuum polarization contribution Open
International audience
View article: New approach to lattice QCD at finite density: reweighting without an overlap problem
New approach to lattice QCD at finite density: reweighting without an overlap problem Open
Approaches to finite baryon density lattice QCD usually suffer from uncontrolled systematic uncertainties in addition to the well-known sign problem. We test a method - sign reweighting - that works directly at finite chemical potential an…
View article: QED and strong isospin corrections in the hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon
QED and strong isospin corrections in the hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon Open
Recently, the Budapest-Marseille-Wuppertal collaboration achieved sub-percent\nprecision in the evaluation of the lowest-order hadronic vacuum polarization\ncontribution to the muon $g_\\mu-2$ (arXiv:hep-lat/2002.12347v3). At this level\no…
View article: New approach to lattice QCD at finite density: reweighting without an overlap problem
New approach to lattice QCD at finite density: reweighting without an overlap problem Open
Approaches to finite baryon density lattice QCD usually suffer from uncontrolled systematic uncertainties in addition to the well-known sign problem. We test a method - sign reweighting - that works directly at finite chemical potential an…
View article: Equation of state of QCD at finite chemical potential from an alternative expansion scheme
Equation of state of QCD at finite chemical potential from an alternative expansion scheme Open
The equation of state of Quantum Chromodynamics (QCD) at finite density is currently known only in a limited range in the baryon chemical potential $\mu_B$. This is due to fundamental shortcomings of traditional methods such as Taylor expa…
View article: Lattice simulations of the QCD chiral transition at real baryon density
Lattice simulations of the QCD chiral transition at real baryon density Open
State-of-the-art lattice QCD studies of hot and dense strongly interacting\nmatter currently rely on extrapolation from zero or imaginary chemical\npotentials. The ill-posedness of numerical analytic continuation puts severe\nlimitations o…
View article: Report on scipost_202201_00030v1
Report on scipost_202201_00030v1 Open
Most lattice studies of hot and dense QCD matter rely on extrapolation from zero or imaginary chemical potentials.The ill-posedness of numerical analytic continuation puts severe limitations on the reliability of such methods.We studied th…
View article: Exponential reduction of the sign problem at finite density in the 2+1D XY model via contour deformations
Exponential reduction of the sign problem at finite density in the 2+1D XY model via contour deformations Open
We study the 2+1 dimensional XY model at nonzero chemical potential $μ$ on deformed integration manifolds, with the aim of alleviating its sign problem. We investigate several proposals for the deformations, and considerably improve on the…
View article: QED and strong isospin corrections in the hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon
QED and strong isospin corrections in the hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon Open
Recently, the Budapest-Marseille-Wuppertal collaboration achieved sub-percent precision in the evaluation of the lowest-order hadronic vacuum polarization contribution to the muon $g_μ-2$ (arXiv:hep-lat/2002.12347v3). At this level of prec…
View article: Lattice simulations of the QCD chiral transition at real $μ_B$
Lattice simulations of the QCD chiral transition at real $μ_B$ Open
Most lattice studies of hot and dense QCD matter rely on extrapolation from zero or imaginary chemical potentials. The ill-posedness of numerical analytic continuation puts severe limitations on the reliability of such methods. We studied …
View article: Finite chemical potential equation of state for QCD from an alternative expansion scheme
Finite chemical potential equation of state for QCD from an alternative expansion scheme Open
The Taylor expansion approach to the equation of state of QCD at finite chemical potential struggles to reach large chemical potential μ B . This is primarily due to the intrinsic diffculty in precisely determining higher order Taylor coef…
View article: Erratum: Radius of convergence in lattice QCD at finite <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>μ</mml:mi><mml:mi>B</mml:mi></mml:msub></mml:math> with rooted staggered fermions [Phys. Rev. D 101, 074511 (2020)]
Erratum: Radius of convergence in lattice QCD at finite with rooted staggered fermions [Phys. Rev. D 101, 074511 (2020)] Open
Received 3 December 2021DOI:https://doi.org/10.1103/PhysRevD.104.119901Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintai…
View article: Quantifying corrections to the hadron resonance gas with lattice QCD
Quantifying corrections to the hadron resonance gas with lattice QCD Open
The hadron resonance gas (HRG) model and its extensions are often used to describe the hadronic phase of strongly interacting matter. In our work we use lattice-QCD simulations with temporal extents of $N_τ=8,10$ and $12$ to quantify corre…
View article: New approach to lattice QCD at finite density: reweighting without an overlap problem
New approach to lattice QCD at finite density: reweighting without an overlap problem Open
Approaches to finite baryon density lattice QCD usually suffer from uncontrolled systematic uncertainties in addition to the well-known sign problem. We test a method - sign reweighting - that works directly at finite chemical potential an…
View article: Equation of state of QCD at finite chemical potential from an alternative expansion scheme
Equation of state of QCD at finite chemical potential from an alternative expansion scheme Open
The equation of state of Quantum Chromodynamics (QCD) at finite density is currently known only in a limited range in the baryon chemical potential $μ_B$. This is due to fundamental shortcomings of traditional methods such as Taylor expans…
View article: Corrections to the hadron resonance gas from lattice QCD and their effect on fluctuation-ratios at finite density
Corrections to the hadron resonance gas from lattice QCD and their effect on fluctuation-ratios at finite density Open
The hadron resonance gas (HRG) model is often believed to correctly describe the confined phase of QCD. This assumption is the basis of many phenomenological works on QCD thermodynamics and of the analysis of hadron yields in relativistic …