Chiral phase transition scenarios from the vector meson extended Polyakov quark meson model

Chiral phase transition is investigated in an $SU(3)_L \times SU(3)_R$ symmetric vector meson extended linear sigma model with additional constituent quarks and Polyakov loops (extended Polyakov quark meson model). The parameterization of the Lagrangian is done at zero temperature in a hybrid approach, where the mesons are treated at tree-level, while the constituent quarks at 1-loop level. The temperature and baryochemical potential dependence of the two assumed scalar condensates are calculated from the hybrid 1-loop level equations of states. The order of the phase transition along the $T=0$ and $\mu_B=0$ axes are determined for various parameterization scenarios. We find that in order to have a first order phase transition at $T=0$ as a function of $\mu_B$ a light isoscalar particle is needed.Comment: 6 pages, 2 figures, Presented at Excited QCD 2015 (8-14 March 2015, Tatranska Lomnica, Slovakia

Phase diagram and isentropic curves from the vector meson extended Polyakov quark meson model

In the framework of the $N_f = 2+1$ flavor (axial)vector meson extended Polyakov quark meson model we investigate the QCD phase diagram at finite temperature and density. We use a $\chi^2$ minimization procedure to parameterize the model based on tree\,-\,level decay widths and vacuum scalar and pseudoscalar curvature masses which incorporate the contribution of the constituent quarks. Using a hybrid approximation (mesons at tree level, fermions at one\,-\,loop level) for the grand potential we determine the phase boundary both on the $\mu_B-T$ and $\rho-T$ planes. We also determine the location of the critical end point of the phase diagram. Moreover by calculating the pressure and other thermodynamical quantities derived from it, we determine a set of isentropic curves in the crossover region. We show that the curves behave very similarly as their counterparts obtained from the lattice in the crossover regime.Comment: 6 pages, 4 figures, Presented at Excited QCD 2017, 7-13 May 2017, Sintra, Portuga

Chiral phase transition in the vector meson extended linear sigma model

In the framework of an SU(3) (axial)vector meson extended linear sigma model with additional constituent quarks and Polyakov loops, we investigate the effects of (axial)vector mesons on the chiral phase transition. The parameters of the Lagrangian are set at zero temperature and we use a hybrid approach where in the effective potential the constituent quarks are treated at one-loop level and all the mesons at tree-level. We have four order parameters, two scalar condensates and two Polyakov loop variables and their temperature and baryochemical potential dependence are determined from the corresponding field equations. We also investigate the changes of the tree-level scalar meson masses in the hot and dense medium.Comment: 5 pages, 6 figure

A statistical method to estimate low-energy hadronic cross sections

In this article we propose a model based on the Statistical Bootstrap approach to estimate the cross sections of different hadronic reactions up to a few GeV in c.m.s energy. The method is based on the idea, when two particles collide a so called fireball is formed, which after a short time period decays statistically into a specific final state. To calculate the probabilities we use a phase space description extended with quark combinatorial factors and the possibility of more than one fireball formation. In a few simple cases the probability of a specific final state can be calculated analytically, where we show that the model is able to reproduce the ratios of the considered cross sections. We also show that the model is able to describe proton\,-\,antiproton annihilation at rest. In the latter case we used a numerical method to calculate the more complicated final state probabilities. Additionally, we examined the formation of strange and charmed mesons as well, where we used existing data to fit the relevant model parameters.Comment: 12 pages, 12 figures, submitted to EPJ

The Management and Information System Aspects of Supply Networks

The driving forces of the late 20th Century: the evolution of ICT and the globalization of the world market affected the relationship of the companies, evolved the system of supply chains (SC), the newest structure of material and information flows among firms and any other organizations. The new structure needs a adequate management style and information supply system. The adequate management methodes and tools based ont he supply chain oriented management approach is the SCM. The SCM as a method is a intermediate state of the market driven transactions and the strict hierarchical control. From information supply point of view the SCM requires a inter-organizaions integration among the SC members, which is more then a technical problem, and so the Internet is only a tool to satisfy information needs. SCM has to have an adequate information supply system which is one of main task of future development of ICT. Key words: supply chain, supply chain management, komplex adaptív rendszer, kooperatív rendszer, ICT

Pszichoanalízis és pedagógia. Változatok Ferenczire

„Az uralkodó rezsim (gyermeknevelés, a felnőttek szenvedélyessége) mindenki számára megnehezíti, hogy a rokon- és ellenszenvektől és igazságtalanságuktól megszabaduljon. Az emberiség karaktere talán egyszer majd jobb lesz (a változás képességének határai). Még a tudomány is ’szenvedélyes’, mikor csak az egoisztikus ösztönöket látja meg és ismeri el. Az a természetes szükséglet, hogy megfelelő normális kielégültség után megosszuk az örömérzéseket valamint a természet harmóniaelve azonban nincs kellőképpen figyelembe véve.” Ezt írja Ferenczi (1996) Klinikai Naplójában 1932. augusztus 13-án A pszichoanalízis bűneinek lajstroma cím alatt. Korábban pedig, április 26-án Freudról ezt: „gyógyítási módszerét, csakúgy mint elméletét, egyre jobban [befolyásolja] érdeklődése a rend, a karakter, a rossz felettes-énnek jobbal való helyettesítése iránt; pedagógiaivá válik.” Még korábban, március 17-én: „Freud olyan erősen tartja magát a következetes neveléshez, mint én az elmélyedéshez a relaxációs technikában.

Measures and Actions for Coordinated Regional Logistics Policies

This publication stems from the work of the CORELOG project (Coordinated Regional Logistics), financed within the EU Initiative INTERREG IIIB CADSES NP (Central, Adriatic, Danubian and South-Eastern European Space) and coordinated by Regione Emilia- Romagna in cooperation with the Institute for Transport and Logistics (ITL). The project work is focussed on the development of coordinated regional policies in transport and logistics which can grant companies’ competitiveness and the territorial sustainability of transport and logistics activities.regional logistics, benchmark, decision-making