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Now showing items 1-65 of 1

Title: QCD thermodynamics with dynamical overlap fermions

Author: ; ; ; ; ; ; ; ;

Date: 2012

Submitted: 2020-04-07

(2012)

We study QCD thermodynamics using two flavors of dynamical overlap fermions with quark masses corresponding to a pion mass of 350 MeV. We determine several observables on N-t = 6 and 8 lattices. All our runs are performed ...

Title: Isospin Splittings in the Light-Baryon Octet from Lattice QCD and QED

Author: ; ; ; ; ; ; ; ; ; ; Portelli, A; Ramos, A; Sastre, A; Szabo, K

Date: 2013

Submitted: 2020-04-07

(2013)

While electromagnetic and up-down quark mass difference effects on octet baryon masses are very small, they have important consequences. The stability of the hydrogen atom against beta decay is a prominent example. Here, ...

Title: Freeze-Out Parameters from Electric Charge and Baryon Number Fluctuations: Is There Consistency?

Author: ; ; ; ; ;

Date: 2014

Submitted: 2020-04-07

(2014)

Recent results for moments of multiplicity distributions of net protons and net-electric charge from the STAR Collaboration are compared to lattice QCD results for higher order fluctuations of baryon number and electric ...

Title: The QCD equation of state with dynamical quarks

Author: ; ; ; ; ; ; ;

Date: 2010

Submitted: 2020-04-07

(2010)

The present paper concludes our investigation on the QCD equation of state with 2 + 1 staggered flavors and one-link stout improvement. We extend our previous study [JHEP 01 (2006) 089] by choosing even finer lattices. ...

Title: QCD thermodynamics with continuum extrapolated Wilson fermions I

Author: ; ; ; ; ; ; ; ; ;

Date: 2012

Submitted: 2020-04-07

(2012)

QCD thermodynamics is considered using Wilson fermions in the fixed scale approach. The temperature dependence of the renormalized chiral condensate, quark number susceptibility and Polyakov loop is measured at four lattice ...

Title: Static QQ pair free energy and screening masses from correlators of Polyakov loops: continuum extrapolated lattice results at the QCD physical point

Author: ; ; ; ; ;

Date: 2015

Submitted: 2020-04-07

(2015)

We study the correlators of Polyakov loops, and the corresponding gauge invariant free energy of a static quark-antiquark pair in 2+1 flavor QCD at finite temperature. Our simulations were carried out on N-t = 6, 8, 10, ...

Title: Full result for the QCD equation of state with 2 +/- 1 flavors

Author: ; ; ; ; ;

Date: 2014

Submitted: 2020-04-07

(2014)

We present a full result for the 2 + 1 flavor QCD equation of state. All the systematics are controlled, the quark masses are set to their physical values, and the continuum extrapolation is carried out. This extends our ...

Title: Ratio F-K/F-pi in QCD

Author: ; ; ; ; ; ; ; ; ;

Date: 2010

Submitted: 2020-04-07

(2010)

We determine the ratio F-K/ F-pi in QCD with N-f =2 + 1 flavors of sea quarks, based on a series of lattice calculations with three different lattice spacings, large volumes, and a simulated pion mass reaching down to about ...

Title: High-precision scale setting in lattice QCD

Author: ; ; ; ; ; ; ; ; ; ; Szabo, KK

Date: 2012

Submitted: 2020-04-07

(2012)

Scale setting is of central importance in lattice QCD. It is required to predict dimensional quantities in physical units. Moreover, it determines the relative lattice spacings of computations performed at different values ...

Title: Freeze-out parameters: Lattice meets experiment

Author: ; ; ; ; ;

Date: 2013

Submitted: 2020-04-07

(2013)

We present our results for ratios of higher order fluctuations of electric charge as functions of the temperature. These results are obtained in a system of 2+1 quark flavors at physical quark masses and continuum extrapolated. ...

Title: Is There a Flavor Hierarchy in the Deconfinement Transition of QCD?

Author: ; ; ; ;

Date: 2013

Submitted: 2020-04-07

(2013)

We present possible indications for flavor separation during the QCD crossover transition based on continuum extrapolated lattice QCD calculations of higher order susceptibilities. We base our findings on flavor-specific ...

Title: Is there still any T-c mystery in lattice QCD? Results with physical masses in the continuum limit III

Author: ; ; ; ; ; ;

Date: 2010

Submitted: 2020-04-07

(2010)

The present paper concludes our investigations on the QCD cross-over transition temperatures with 2+1 staggered flavours and one-link stout improvement. We extend our previous two studies [Phys. Lett. B643 (2006) 46, JHEP ...

Title: The QCD transition temperature: results with physical masses in the continuum limit II

Author: ; ; ; ; ; ;

Date: 2009

Submitted: 2020-04-07

(2009)

We extend our previous study [Phys. Lett. B 643 (2006) 46] of the cross-over temperatures (T-c) of QCD. We improve our zero temperature analysis by using physical quark masses and finer lattices. In addition to the kaon ...

Title: Magnetic susceptibility of QCD at zero and at finite temperature from the lattice

Author: ; ; ; ; ; ; ;

Date: 2012

Submitted: 2020-04-07

(2012)

The response of the QCD vacuum to a constant external (electro)magnetic field is studied through the tensor polarization of the chiral condensate and the magnetic susceptibility at zero and at finite temperature. We determine ...

Title: Local CP-violation and electric charge separation by magnetic fields from lattice QCD

Author: ; ; ; ; ;

Date: 2014

Submitted: 2020-04-07

(2014)

We study local CP-violation on the lattice by measuring the local correlation between the topological charge density and the electric dipole moment of quarks, induced by a constant external magnetic field. This correlator ...

Title: The QCD equation of state in background magnetic fields

Author: ; ; ; ;

Date: 2014

Submitted: 2020-04-07

(2014)

Title: QCD quark condensate in external magnetic fields

Author: ; ; ; ; ;

Date: 2012

Submitted: 2020-04-07

(2012)

We present a comprehensive analysis of the light condensates in QCD with 1 + 1 + 1 sea quark flavors (with mass-degenerate light quarks of different electric charges) at zero and nonzero temperatures of up to 190 MeV and ...

Title: QCD equation of state at nonzero chemical potential: continuum results with physical quark masses at order mu(2)

Author: ; ; ; ; ; ;

Date: 2012

Submitted: 2020-04-07

(2012)

We determine the equation of state of QCD for nonzero chemical potentials via a Taylor expansion of the pressure. The results are obtained for N-f = 2 + 1 flavors of quarks with physical masses, on various lattice spacings. ...

Title: Precision SU(3) lattice thermodynamics for a large temperature range

Author: ; ; ; ;

Date: 2012

Submitted: 2020-04-07

(2012)

We present the equation of state (pressure, trace anomaly, energy density and entropy density) of the SU(3) gauge theory from lattice field theory in an unprecedented precision and temperature range. We control both finite ...

Title: Scaling study for 2 HEX smeared fermions: hadron and quark masses

Author: ; ; ; ; ; ; ; ; ;

Date: 2010

Submitted: 2020-08-11

(2010)

Title: Rho decay width from the lattice

Author: ; ; ; ; ; ; ; ; ; ; Ramos, A; Szabo, KK

Date: 2010

Submitted: 2020-08-11

(2010)

Title: Electromagnetic corrections to light hadron masses

Author: ; ; ; ; ; ; ; ; ; ; Ramos, A; Szabo, KK

Date: 2010

Submitted: 2020-08-11

(2010)

Title: QCD transition temperature: full staggered result

Author: ; ; ; ; ; ;

Date: 2010

Submitted: 2020-08-11

(2010)

We conclude our investigations on the QCD cross-over transition temperatures with 2+1 staggered flavours and one-link stout improvement. We extend our previous two studies [Phys. Lett. B643 (2006) 46, JHEP 0906:088 (2009)] ...

Title: Recent results on QCD thermodynamics: lattice QCD versus Hadron Resonance Gas model

Author: ; ; ; ; ; ;

Date: 2011

Submitted: 2020-08-11

(2011)

Title: Mixed action simulations: Approaching physical quark masses

Author: ; ; ; ; ; ; ; ; ;

Date: 2007

Submitted: 2020-08-11

(2007)

Title: Scaling study of dynamical smeared-link clover fermions

Author: ; ; ; ; ; ; ; ; ; ; Vulvert, G

Date: 2009

Submitted: 2020-08-11

(2009)

We present a framework for phenomenological lattice QCD calculations which makes use of a tree-evel Symanzink improved action for gluons and stout-link Wilson fermions. We give details of our efficient HMC/RHMC algorithm ...

Title: Ab Initio Determination of Light Hadron Masses

Author: ; ; ; ; ; ; ; ; ; ; Szabo, KK; Vulvert, G

Date: 2008

Submitted: 2020-08-11

(2008)

More than 99% of the mass of the visible universe is made up of protons and neutrons. Both particles are much heavier than their quark and gluon constituents, and the Standard Model of particle physics should explain this ...

Title: Fluctuations of conserved charges at finite temperature from lattice QCD

Author: ; ; ; ; ;

Date: 2012

Submitted: 2020-08-11

(2012)

We present the full results of the Wuppertal-Budapest lattice QCD collaboration on flavor diagonal and non-diagonal quark number susceptibilities with 2 + 1 staggered quark flavors, in a temperature range between 125 and ...

Title: Quantum electrodynamics in finite volume and nonrelativistic effective field theories

Author: ; ; ; ; ; ;

Date: 2016

Submitted: 2020-08-10

(2016)

Electromagnetic effects are increasingly being accounted for in lattice quantum chromodynamics computations. Because of their long-range nature, they lead to large finite-size effects over which it is important to gain ...

Title: Fluctuations and correlations in high temperature QCD

Author: ; ; ; ; ; ;

Date: 2015

Submitted: 2020-08-10

(2015)

Title: Axion cosmology, lattice QCD and the dilute instanton gas

Author: ; ; ; ; ; ; ; ;

Date: 2016

Submitted: 2020-08-10

(2016)

Title: Static quark-Antiquark pair free energy and screening masses: Continuum results at the QCD physical point

Author: ; ; ; ; ;

Date: 2015

Submitted: 2020-08-10

(2015)

We study the correlators of Polyakov loops, and the corresponding gauge invariant free energy of a static quark-Antiquark pair in 2+1 flavor QCD at finite temperature. Our simulations were carried out on Nt = 6, 8, 10, 12, ...

Title: The critical point of lattice QCD on the mu - T plane

Author: ;

Date: 2001

Submitted: 2020-08-07

(2001)

We propose a method to study lattice QCD at finite temperature and chemical potential. We compare it with direct results and with the Glasgow method by using n_f=4 QCD at Im(\mu)\neq 0. We locate the critical endpoint (E) ...

Title: Lattice QCD results at finite T and mu

Author: ;

Date: 2003

Submitted: 2020-08-07

(2003)

We propose a method to study lattice QCD at finite temperature (T) and chemical potential (mu). We test the method and compare it with the Glasgow method using n(f) = 4 staggered QCD with imaginary mu. The critical endpoint ...

Title: The QCD equation of state at nonzero densities: lattice result

Author: ; ;

Date: 2003

Submitted: 2020-08-07

(2003)

In this Letter we give the equation of state of QCD at finite temperatures and densities. The recently proposed overlap improving multi-parameter reweighting technique is used to determine observables at nonvanishing ...

Title: The QCD equation of state at finite T and mu

Author: ; ; ; ; ;

Date: 2003

Submitted: 2020-08-07

(2003)

We calculate the pressure (p), the energy density (epsilon) and the baryon density (n(B)) of QCD at finite temperatures (T) and chemical potentials (mu). The recently proposed overlap improving multi-parameter reweighting ...

Title: A scalable PC-based parallel computer for lattice QCD

Author: ; ;

Date: 2003

Submitted: 2020-08-07

(2003)

A PC-based parallel computer for medium/large scale-lattice QCD
simulations is suggested. The Eotvos Univ., Inst. Theor. Phys.
cluster consists of 137 Intel P4-1.7GHz nodes. Gigabit Ethernet
cards axe used for nearest ...

Title: Dynamical overlap fermions, results with hybrid Monte-Carlo algorithm

Author: ; ;

Date: 2004

Submitted: 2020-08-07

(2004)

We present first, exploratory results of a hybrid Monte-Carlo algorithm for dynamical, n(f) = 2, four-dimensional QCD with overlap fermions. As expected, the computational requirements are typically two orders of magnitude ...

Title: Finite T/mu lattice QCD and the critical point

Author: ;

Date: 2004

Submitted: 2020-08-07

(2004)

We present results on lattice QCD at finite temperature (T) and chemical potential (mu). We apply the overlap-improving multi-parameter reweighting technique for n(f) = 4 and 2 + 1 staggered QCD. We use semi-realistic ...

Title: The status of Pentaquark spectroscopy on the lattice

Author: ; ; ;

Date: 2004

Submitted: 2020-08-07

(2004)

The present work is a summary of the status of lattice pentaquark calculations. After a pedagogic introduction to the basics of lattice hadron spectroscopy we give a critical comparison of results presently available in ...

Title: Dynamical overlap fermions, results with HMC algorithm

Author: ; ;

Date: 2005

Submitted: 2020-08-07

(2005)

We present results of a hybrid Monte-Carlo algorithm for dynamical, n(f) = 2, four-dimensional QCD with overlap fermions. The fermionic force requires careful treatment, when changing topological sectors. The pion mass ...

Title: Grand canonical potential for a static quark-anti-quark pair at mu not equal 0

Author: ; ; ;

Date: 2005

Submitted: 2020-08-07

(2005)

We present numerical results on the static quark-anti-quark grand canonical potential in full QCD at nonvanishing temperature (T) and quark chemical potential (mu). Non-zero mu-s are reached by means of multiparameter ...

Title: Comprehensive search for the Theta(+) pentaquark on the lattice

Author: ; ; ; ;

Date: 2006

Submitted: 2020-08-07

(2006)

We study spin 1/2 isoscalar and isovector, even and odd parity candidates for the Theta(+)(1540) pentaquark particle using large scale lattice QCD simulations. Previous lattice works led to inconclusive results because so ...

Title: The equation of state in lattice QCD: With physical quark masses towards the continuum limit

Author: ; ; ;

Date: 2006

Submitted: 2020-08-07

(2006)

Title: The QCD phase diagram at finite density

Author: ; ;

Date: 2006

Submitted: 2020-08-07

(2006)

We study the density of states method to explore the phase diagram of the chiral transition on the tempeature and quark chemical potential plane. Four quark flavours are used in the analysis. Though the method is quite ...

Title: Topology with dynamical overlap fermions

Author: ; ; ;

Date: 2006

Submitted: 2020-08-07

(2006)

Title: The Density of states method at finite chemical potential

Author: ; ;

Date: 2005

Submitted: 2020-08-07

(2005)

Title: The QCD transition temperature: Results with physical masses in the continuum limit

Author: ; ; ;

Date: 2006

Submitted: 2020-08-07

(2006)

The transition temperature (T-c) of QCD is determined by Symanzik improved gauge and stout-link improved staggered fermionic lattice simulations. We use physical masses both for the light quarks (m(ud)) and for the strange ...

Title: The order of the quantum chromodynamics transition predicted by the standard model of particle physics

Author: ; ; ; ;

Date: 2006

Submitted: 2020-08-07

(2006)

Quantum chromodynamics (QCD) is the theory of the strong interaction, explaining (for example) the binding of three almost massless quarks into a much heavier proton or neutron-and thus most of the mass of the visible ...

Title: Lattice QCD as a video game

Author: ; ; ; ; ;

Date: 2007

Submitted: 2020-08-07

(2007)

The speed, bandwidth and cost characteristics of today's PC graphics cards make them an attractive target as general purpose computational platforms. High performance can be achieved also for lattice simulations but the ...

Title: The PMS project: Poor man's supercomputer

Author: ; ; ; ; ;

Date: 2001

Submitted: 2020-08-07

(2001)

We briefly describe the Poor Man's Supercomputer (PMS) project carried out at Eotvos University, Budapest. The goal was to construct a cost effective, scalable, fast parallel computer to perform numerical calculations of ...

Title: Electroweak phase transition in the minimal supersymmetric standard model: 4-Dimensional lattice simulations

Author: ; ; ; ; ;

Date: 2000

Submitted: 2020-08-07

(2000)

Lattice results show no standard model ISM) electroweak phase transition (EWPT) for Higgs masses approximate to 72 GeV. which is below the present experimental limit. perturbation theory and 3-dimensional simulations ...

Title: Grand unification signal from ultrahigh energy cosmic rays?

Author: ;

Date: 2001

Submitted: 2020-08-07

(2001)

The spectrum of ultrahigh energy (above approximate to 10(9) GeV) cosmic rays is consistent with the decay of grand unification scale particles. The predicted mass is m(x) = 10(h) GeV, where h = 14.6(-1.7)(+1.6).

Title: Astroparticle physics signals beyond the standard model

Author:

Date: 2001

Submitted: 2020-08-07

(2001)

Title: Possible detection of relic neutrinos and determination of their mass

Author: ; ;

Date: 2001

Submitted: 2020-08-07

(2001)

Title: Propagation of ultrahigh energy cosmic rays and compact sources

Author: ;

Date: 2001

Submitted: 2020-08-07

(2001)

Title: Ultrahigh energy cosmic rays as a grand unification signal

Author: ;

Date: 2001

Submitted: 2020-08-07

(2001)

Title: Four-dimensional lattice results on the MSSM electroweak phase transition

Author: ; ; ; ; ;

Date: 2001

Submitted: 2020-08-07

(2001)

Title: Z burst scenario for the highest energy cosmic rays

Author: ; ;

Date: 2003

Submitted: 2020-08-07

(2003)

Title: Electroweak instantons as a solution to the ultrahigh energy cosmic ray puzzle

Author: ; ; ;

Date: 2003

Submitted: 2020-08-07

(2003)

We propose a scenario in which a simple power-like primary spectrum for protons with sources at cosmological distances leads to a quantitative description of all the details of the observed cosmic ray spectrum for energies ...

Title: Strongly interacting neutrinos as the highest energy cosmic rays

Author: ; ; ;

Date: 2004

Submitted: 2020-08-07

(2004)

We show that all features of the ultrahigh energy cosmic ray spectrum from 10^{17} eV to 10^{21} eV can be described with a simple power-like injection spectrum of protons under the assumption that the neutrino-nucleon ...

Title: Strong neutrino nucleon interactions at ultrahigh energies as a solution to the GZK puzzle

Author: ; ; ;

Date: 2005

Submitted: 2020-08-07

(2005)

Title: Finite temperature and chemical potential in lattice QCD and its critical point

Author: ;

Date: 2002

Submitted: 2020-08-07

(2002)