Spectral Properties of Quarks at Finite Temperature in Lattice QCD (2009)
Kitazawa, Masakiyo, Karsch, Frithjof
We analyze the quark spectral function above and below the critical temperature for deconfinement and at finite momentum in quenched lattice QCD. It is found that the temporal quark correlation...
Quark propagator at finite temperature and finite momentum in quenched lattice QCD (2009)
Karsch, Frithjof, Kitazawa, Masakiyo
We present an analysis of the quark spectral function above and below the critical temperature for deconfinement performed at zero and non-zero momentum in quenched lattice QCD using clover improved...
Fluctuations of Goldstone modes and the chiral transition in QCD (2008)
We provide evidence for the influence of thermal fluctuations of Goldstone modes on the chiral condensate at finite temperature. We show that at fixed temperature, T
Calculating Quark Number Susceptibilities with Domain-Wall Fermions (2008)
Hegde, Prasad, Karsch, Frithjof, Schmidt, Christian
We present results from calculations of different quark number and hadronic susceptibilities on 2+1-flavor dynamical domain wall ensembles. We find that the iso-spin and electric charge...
Equation of state and more from lattice regularized QCD (2008)
We present results from a calculation of the QCD equation of state with two light (up, down) and one heavier (strange) quark mass performed on lattices with three different values of the lattice...
Recent lattice results on finite temperature and density QCD, part I (2007)
We discuss recent progress made studies of bulk thermodynamics of strongly interacting matter through lattice simulations of QCD with an almost physical light and strange quark mass spectrum. We...
Recent lattice results on finite temerature and density QCD, part II (2007)
We discuss recent progress in studies of QCD thermodynamics with almost physical light quark masses and a physical value of the strange quark mass. We summarize results on the transition temperature...
Spectral Properties of Quarks in the Quark-Gluon Plasma (2007)
Karsch, Frithjof, Kitazawa, Masakiyo
We analyze the spectral properties of the quark propagator above the critical temperature for the deconfinement phase transition in quenched lattice QCD using clover improved Wilson fermions. The...
Spectral properties of quarks above T_c in quenched lattice QCD (2007)
Karsch, Frithjof, Kitazawa, Masakiyo
We analyze the quark spectral function above the critical temperature for deconfinement in quenched lattice QCD using clover improved Wilson fermions in Landau gauge. We show that the temporal quark...
Transition temperature in QCD with physical light and strange quark masses (2007)
We present results from a calculation of the transition temperature in QCD with two light and one heavier (strange) quark mass on lattices with temporal extent N_t =4 and 6. Calculations with...
Properties of the Quark Gluon Plasma: A lattice perspective (2006)
We discuss results from lattice calculations for a few observables that are sensitive to different length scales in the high temperature phase of QCD and can give insight into its non-perturbative...
At high temperatures or densities matter formed by strongly interacting elementary particles (hadronic matter) is expected to undergo a transition to a new form of matter - the quark gluon plasma -...
Lattice QCD at High Temperature and the QGP (2006)
We review recent progress in studies of bulk thermodynamics of strongly interacting matter, present results on the QCD equation of state and discuss the status of studies of the phase diagram at...
Hadronic fluctuations in the QGP (2005)
Karsch, Frithjof, Ejiri, S, Redlich, K
We analyze fluctuations of quark number and electric charge, in 2-flavour QCD at finite temperature and vanishing net baryon number density. In the hadronic phase we find that an enhancement of...
The QCD equation of state for two flavours at non-zero chemical potential (2005)
Ejiri, S, Allton, C R, Döring, M, Hands, S J, Kaczmarek, O, Karsch, Frithjof, ...
We present results of a simulation of 2 flavour QCD on a $16^3\times4$ lattice using p4-improved staggered fermions with bare quark mass $m/T=0.4$. Derivatives of the thermodynamic grand canonical...
Hadronic fluctuations at the QCD phase transition (2005)
Ejiri, S, Karsch, Frithjof, Redlich, K
We discuss the properties of hadronic fluctuations, i.e. fluctuations of net quark and isospin numbers as well as electric charge, in the vicinity of the QCD transition in isospin-symmetric matter at...
Deconfinement and Quarkonium Suppression (2005)
Modifications in the production pattern of heavy quark bound states have long been considered to provide sensitive signatures for the thermal properties of dense matter created in heavy ion...
Thermodynamic Properties of Strongly Interacting Matter at Non-zero Baryon Number Density (2004)
We present recent lattice results on QCD thermodynamics at non-vanishing baryon number density obtained from a 6th order Taylor expansion in the chemical potential. Results for bulk thermodynamic...
Charmonia at finite momenta in a deconfined plasma (2004)
Datta, Saumen, Karsch, Frithjof, Petreczky, Peter, Wissel, Soenke, Wetzorke, Ines
Lattice studies of charmonium systems have indicated that in a deconfined gluonic plasma ground state charmonia survive as bound states upto temperatures \~ 2 Tc. After surveying the methodologies...
Free energies of static three quark systems (2004)
Hübner, K, Kaczmarek, O, Karsch, Frithjof, Vogt, O
We study the behaviour of free energies of baryonic systems composed of three heavy quarks on the lattice in SU(3) pure gauge theory at finite temperature. For all temperatures above $T_c$ we find...
Charmonium systems after the deconfinement transition (2004)
Datta, Saumen, Karsch, Frithjof, Petreczky, Peter, Wetzorke, Ines
The behavior of charmonia after the deconfinement transition is investigated on quenched lattices. Analysis of temporal correlators on fine lattices at temperatures upto 3 T_c show that the J/psi and...
News from Lattice QCD on Heavy Quark Potentials and Spectral Functions of Heavy Quark States (2004)
We discuss recent lattice results on in-medium properties of hadrons and focus on thermal properties of heavy quark bound states. We will clarify the relation between heavy quark free energies and...
Lattice QCD at non-zero chemical potential and the resonance gas model (2004)
We present results from lattice calculations on the thermodynamics of QCD at non-zero temperature and baryon chemical potential and discuss the role of resonances for the occurrence of the transition...
Behavior of Charmonium Systems after Deconfinement (2003)
Datta, Saumen, Karsch, Frithjof, Petreczky, Peter, Wetzorke, Ines
We present a study of charmonia in hot gluonic plasma, for temperatures upto three times the deconfinement transition temperature Tc. q \bar{q} systems with quark masses close to the charm mass and...
Heavy quark free energies and the renormalized Polyakov loop in full QCD (2003)
Kaczmarek, Olaf, Ejiri, Shinji, Karsch, Frithjof, Laermann, Edwin, Zantow, Felix
We study the renormalized free energy of a heavy quark anti-quark pair in the different colour channels in full QCD at finite temperature. Similarities and differences to the quenched case are...
ALICE Physics Theoretical Overview (2003)
Alessandro, B, Aurenche, Patrick, Baier, R, Becattini, F, Botje, M, Carminati, F, ...
ALICE is the dedicated heavy-ion experiment at the LHC. This note summarises theoretical developments in the field of hot and dense matter and their relevance for observables accessible to ALICE in...
Study of QCD thermodynamics at finite density by Taylor expansion (2003)
Ejiri, Shinji, Allton, Chris R., Hands, Simon J., Kaczmarek, Olaf, Karsch, Frithjof, Laermann, Edwin, ...
We discuss the phase structure and the equation of state for QCD at non-zero temperature and density. Derivatives of $\ln Z$ with respect to quark chemical potential $\mu_q$ up to fourth order are...
A Study of Charmonium Systems across the Deconfinement Transition (2002)
Datta, Saumen, Karsch, Frithjof, Petreczky, Peter, Wetzorke, Ines
We present results from lattice studies of charmonium systems near the deconfinement transition temperature. On quenched isotropic lattices with lattice spacings between 0.02 and 0.05 fm, bar{q} q...
1/M correction to quenched QCD with non-zero baryon density (2001)
Aarts, Gert, Kaczmarek, Olaf, Karsch, Frithjof, Stamatescu, Ion-Olimpiu
We study the \kappa^2 corrections to the quenched limit of \mu>0 QCD. We use an improved reweighting procedure.
Thermodynamics of 2 and 3 flavour QCD (2001)
We discuss recent results on the thermodynamics of QCD in the presence of light dynamical quark degrees of freedom. In particular, we concentrate on an analysis of the flavour and quark mass...
Lattice QCD at High Temperature and Density (2001)
After a brief introduction into basic aspects of the formulation of lattice regularized QCD at finite temperature and density we discuss our current understanding of the QCD phase diagram at finite...
Lattice Results on QCD Thermodynamics (2001)
We review recent results on QCD at finite temperature. Main emphasis is put on a discussion of observables which are of immediate interest to experimental searches for the Quark Gluon Plasma, i.e....
Hadron Correlators in the Deconfined Phase (2000)
Karsch, Frithjof, Mustafa, M G, Thoma, M H
Temporal meson correlators and their spectral functions are calculated in the deconfined phase using the hard thermal loop resummation technique. The spectral functions exhibit strong medium effects...
The three-dimensional, three-state Potts Model in an External Field (2000)
Karsch, Frithjof, Stickan, Sven
We analyze the critical behaviour of the three-dimensional, three-state Potts model in the presence of an external ordering field. From a finite size scaling analysis on lattices of size up to 70**3...
Finite Temperature Meson Correlation Functions in HTL Approximation (2000)
Karsch, Frithjof, Mustafa, M G, Thoma, M H
We calculate temporal correlators with meson quantum numbers in the deconfined phase of QCD using the hard thermal loop (HTL) approximation. In this way medium effects such as thermal masses and...
The Pressure in 2, 2+1 and 3 Flavour QCD (2000)
Karsch, Frithjof, Laermann, E, Peikert, A
We calculate the pressure in QCD with two and three light quarks on a latticeof size 16^3x4 using tree level improved gauge and fermion actions. We arguethat for temperatures T > 2T_c systematic...
Discretization effects and gauge independence for the electric and magnetic screening masses (1999)
Cucchieri, Attilio, Karsch, Frithjof
We evaluate the electric and magnetic screening masses from the long-distance behavior of the (temporal and spatial) gluon correlation functions, for pure SU(2) gauge theory at finite temperature. In...
Lattice QCD at Finite Temperature and Density (1999)
We review recent results on QCD at finite temperature and non-vanishing baryon number density. We focus on observables which are of immediate interest to experimental searches for the Quark Gluon...
Heavy Quark Potentials in Quenched QCD at High Temperature (1999)
Kaczmarek, Olaf, Karsch, Frithjof, Laermann, Edwin, Lutgemeier, Martin
Heavy quark potentials are investigated at high temperatures. The temperature range covered by the analysis extends from $T$ values just below the deconfinement temperature up to about $4 T_c$ in the...
Deconfinement and Chiral Symmetry Restoration (1999)
We discuss the critical behaviour of strongly interacting matter close to the QCD phase transition. Emphasis is put on a presentation of results from lattice calculations that illustrate deconfining...
Deconfinement and Chiral Symmetry Restoration in an SU(3) Gauge Theory with Adjoint Fermions (1998)
Karsch, Frithjof, Lütgemeier, Martin
We analyze the finite temperature phase diagram of$QC$ with fermions in the adjoint representation. The simulations performed with four dynamical Majorana fermions show that the deconfinement and...
String Breaking in Lattice Quantum Chromodynamics (1998)
DeTar, Carleton, Kaczmarek, Olaf, Karsch, Frithjof, Laermann, Edwin
The separation of a heavy quark and antiquark pair leads to the formation of a tube of flux, or string, which should break in the presence of light quark-antiquark pairs. This expected zero...
On QCD Thermodynamics with Improved Actions (1997)
We discuss recent advances in the calculation of thermodynamic observables using improved actions. In particular, we discuss the calculation of the equation of state of the SU(3) gauge theory, the...
Screened Perturbation Theory (1997)
Karsch, Frithjof, Patkos, Andras, Petreczky, Peter
A new perturbative scheme is proposed for the evaluation of the free energy density of field theories at finite temperature. The screened loop expansion takes into account exactly the phenomenon of...
Lattice Regularized QCD at Finite Temperature (1995)
During the first part of this review we will focus on the thermodynamics of $SU(N)$ gauge theories at finite temperature. We will present results from a calculation of electric and magnetic screening...
Improved actions for QCD thermodynamics on the lattice (1995)
Beinlich, B, Karsch, Frithjof, Laermann, E
Finite cut-off effects strongly influence the thermodynamics of lattice regularized QCD at high temperature in the standard Wilson formulation. We analyze the reduction of finite cut-off effects in...
12th International Symposium on Lattice Field Theory (1995)
Engels, Jürgen, Karsch, Frithjof, Laermann, E, Peterson, Bengt
The Phase Transition to the Quark Gluon Plasma: Recent Results from Lattice Calculations (1995)
We will discuss here some of the recent results obtained from lattice simulations of QCD at non-zero temperature. Such calculations aim at a quantitative understanding of the thermodynamics of...
Hadron Properties in the Vicinity of $T_c$ (1994)
Modifications of hadron masses and some of their basic properties with temperature or nuclear density are considered as one possible signature for the formation of dense hadronic matter in nuclear...
Susceptibilities, the Specific Heat and a Cumulant in Two-Flavour QCD (1994)
Karsch, Frithjof, Laermann, Edwin
We study the quark mass dependence of various response functions, which contribute to chiral susceptibilities and the specific heat in the staggered fermion formulation of two-flavour QCD. This...
New Results and Long-standing Questions in Finite Temperature QCD (1994)
We review recent results on QCD at finite temperature. In particular we will discuss the chiral phase transition in two flavour QCD and new results on the excitation spectrum in the plasma phase of...
Scaling of Pseudo-Critical Couplings in Two-Flavour QCD (1993)
We study the scaling behaviour of the pseudo-critical couplings for the chiral phase transition in two-flavour QCD. We show that all existing results from lattice simulations on lattices with...
Hadronic correlation functions in the QCD plasma phase (1991)
Born, K D, Gupta, S, Irbäck, A, Karsch, Frithjof, Laermann, E, Petersson, B, ...
Flavour degrees of freedom and the transition temperature in QCD (1990)
Gavai, R V, Gupta, S, Irbäck, A, Karsch, Frithjof, Meyer, S, Petersson, B, ...
The spectrum of a class of supersymmetric theories with false vacua (1990)
Karsch, Frithjof, Rabinovici, Eliezer, Shore, Graham M, Veneziano, Gabriele
Improved Monte Carlo renormalization group methods (1990)
Hasenfratz, Anna, Hasenfratz, Peter, Heller, U, Karsch, Frithjof
Monte-Carlo renormalisation group studies of SU(3) lattice gauge theory (1990)
Bowler, K C, Hasenfratz, Anna, Hasenfratz, Peter, Heller, U, Karsch, Frithjof, Kenway, R D, ...
The beta-function and potential at beta = 6.0 and 6.3 in SU(3) gauge theory (1990)
Bowler, K C, Gutbrod, F, Hasenfratz, Peter, Heller, U, Karsch, Frithjof, Kenway, R D, ...
Polyakov loop correlations in Landau gauge and the heavy quark potential (1990)
Attig, N, Karsch, Frithjof, Petersson, B, Satz, Helmut, Wolff, M
The finite temperature phase transition in four flavour QCD on an 8 x 12$^{3}$ lattice (1990)
Gavai, R V, Gupta, S, Irbäck, A, Karsch, Frithjof, Meyer, S, Petersson, B, ...
Finite temperature calculations on anisotropic lattices (1990)
Bender, I, Hashimoto, T, Karsch, Frithjof, Linke, V, Nakamura, A, Schiestl, M, ...
Monte Carlo renormalization group studies of SU(3) lattice gauge theory (1990)
Bowler, K C, Kenway, R D, Pawley, G S, Wallace, D J, Hasenfratz, Anna, Hasenfratz, Peter, ...
The beta function of the SU(3) Wilson action (1990)
Hasenfratz, Anna, Hasenfratz, Peter, Heller, U, Karsch, Frithjof
Rotational symmetry of the SU(3) potential (1990)
Hasenfratz, Anna, Hasenfratz, Peter, Heller, U, Karsch, Frithjof