190 citations · 459 across the 31 of their papers we have counts for
19 papers · 1 filter
Scale dependence of the q and T parameters of the Tsallis distribution in the process of jet fragmentation
Karoly Urmossy, Antal Jakovac
The dependence of the and parameters of the Tsallis-distribution-shaped fragmentation function (FF) on the fragmentation scale (found to be equal to the jet mass) is calcul…
Nuclear and Quark Matter at High Temperature
T. S. Biro, A. Jakovac, Z. Schram
We review important ideas on nuclear and quark matter description on the basis of high- temperature field theory concepts, like resummation, dimensional reduction, interaction scal…
Shear viscosity over entropy density ratio with extended quasi-particles
M. Horváth, A. Jakovác
We consider an effective field theory description of beyond-quasi-particle excitations aiming to associate the transport properties of the system with the spectral density of state…
QCD over : hadrons, partons and continuum
T. S. Biro, A. Jakovac
In this paper we provide a physical picture for the QCD phase transition in terms of qualitative changes in the spectral functions. Our approach takes into account the crossover na…
Hadron melting and QCD thermodynamics
A. Jakovac
We study in this paper mechanisms of hadron melting based on the spectral representation of hadronic quantum channels, and examine the hadron width dependence of the pressure. The…
Representation of spectral functions and thermodynamics
A. Jakovac
In this paper we study the question of effective field assignment to measured or nonperturbatively calculated spectral functions. The straightforward procedure is to approximate it…
Resummations in the Bloch-Nordsieck model
A. Jakovac, P. Mati
We studied different levels of resummations of the exactly solvable Bloch-Nordsieck model in order to be able to compare the approximations with an exact result. We studied one-loo…
Transport coefficients in non-quasiparticle systems
A. Jakovac
Transport coefficeints, in particular the shear viscosity to entropy density ratio is studied in systems where the small-width quasiparticle assumption is not valid. It is found th…
Strange mass dependence of the tricritical point in the U(3)_L x U(3)_R chiral sigma model
A. Jakovac, Zs. Szep
We study the strange quark mass dependence of the tricritical point of the U(3)_L x U(3)_R linear sigma model in the chiral limit. Assuming that the tricritical point is at a large…
Reconciling resummation and renormalization
A. Jakovac
In the naive form of most resummations we get into conflict with order-by-order renormalization. We present a method that is capable to ensure UV consistency of any resummations sa…
Non-Gibbs Particle Spectra from Thermal Equilibrium
T. S. Biro, G. Gyorgyi, A. Jakovac +1
We propose that transverse momentum spectra with power-law tails observed in ultrarelativistic heavy ion collisions can be interpreted as originating in a medium in thermal equilib…
Quantum corrections to Boltzmann equations
A. Jakovac
Because of IR (pinch) singularities a resummation is necessary in non-equilibrium field theories, that can be performed by using Kadanoff--Baym equations. Taking Landau prescriptio…
Generalized Boltzmann equations for on-shell particle production in a hot plasma
A. Jakovac
A novel refinement of the conventional treatment of Kadanoff--Baym equations is suggested. Besides the Boltzmann equation another differential equation is used for calculating the…
Time evolution in linear response: Boltzmann equations and beyond
A. Jakovac
In this work a perturbative linear response analysis is performed for the time evolution of the quasi-conserved charge of a scalar field. One can find two regimes, one follows expo…
Four-dimensional lattice results on the MSSM electroweak phase transition
F. Csikor, Z. Fodor, P. Hegedus +3
We present the results of our large scale 4-dimensional (4d) lattice simulations for the MSSM electroweak phase transition (EWPT). We carried out infinite volume and continuum limi…
Resummation and damping in the O(N) model
A. Jakovac
In this talk I summarize the one loop and higher loop calculations of the effective equations of motion of the O(N) symmetric scalar model in the linear response approximation. At…
Electroweak Phase Transition in the MSSM: 4-Dimensional Lattice Simulations
F. Csikor, Z. Fodor, P. Hegedus +3
Recent lattice results have shown that there is no Standard Model (SM) electroweak phase transition (EWPT) for Higgs boson masses above \approx 72 GeV, which is below the present e…
Classical Statistical Mechanics and Landau Damping
W. Buchmuller, A. Jakovac
We study the retarded response function in scalar -theory at finite temperature. We find that in the high-temperature limit the imaginary part of the self-energy is given by t…
REDUCTION OF THE N-COMPONENT SCALAR MODEL AT TWO LOOP LEVEL
Antal Jakovac
Dimensional reduction of high temperature field theories improves IR features of their perturbative treatment. A crucial question is, what three-dimensional theory is representing…