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    • Several versions

    Pion Production Via Resonance Decay in a Non-extensive Quark-Gluon Medium with Non-additive Energy Composition Rule

    Urmossy, Karoly, Biro, Tamas, Barnaföldi, Gergely
    arXiv.org, Feb 8, 2011 [Peer Reviewed Journal]

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    Quark-gluon plasma connected to finite heat bath

    Biró, Tamás, Gábor Barnaföldi, Gergely, Ván, Péter
    The European Physical Journal A, 2013, Vol.49(9), pp.1-5 [Peer Reviewed Journal]
    Springer Science & Business Media B.V.
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    Title: Quark-gluon plasma connected to finite heat bath
    Author: Biró, Tamás; Gábor Barnaföldi, Gergely; Ván, Péter
    Subject: Particle Collisions -- Analysis ; Thermodynamics -- Analysis ; Reservoirs (Water) -- Analysis;
    Description: We derive entropy formulas for finite reservoir systems, S q , from universal thermostat independence and obtain the functional form of the corresponding generalized entropy-probability relation. Our result interprets thermodynamically the subsystem temperature, T 1 , and the index q in terms of the temperature, T , entropy, S , and heat capacity, C of the reservoir as $ T_1=T \exp(-S/C)$ and $ q=1-1/C$ . In the infinite C limit, irrespective of the value of S , the Boltzmann-Gibbs approach is fully recovered. We apply this framework for the experimental determination of the original temperature of a finite thermostat, T , from the analysis of hadron spectra produced in high-energy collisions, by analyzing frequently considered simple models of the quark-gluon plasma.
    Is part of: The European Physical Journal A, 2013, Vol.49(9), pp.1-5
    Identifier: 1434-6001 (ISSN); 1434-601X (E-ISSN); 10.1140/epja/i2013-13110-0 (DOI)

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    Statistical Power Law due to Reservoir Fluctuations and the Universal Thermostat Independence Principle

    Biró, Tamas, Van, Peter, Barnaföldi, Gergely, Ürmössy, Karoly
    Entropy, 2014, Vol.16(12), pp.6497-6514 [Peer Reviewed Journal]

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    Mass hierarchy and energy scaling of the Tsallis – Pareto parameters in hadron productions at RHIC and LHC energies

    Bíró Gábor, Barnaföldi Gergely Gábor, Biró Tamás Sándor, Shen Keming
    EPJ Web of conferences, 01 January 2018, Vol.171, p.14008 [Peer Reviewed Journal]

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    FRG Approach to Nuclear Matter at Extreme Conditions

    Pósfay, Péter, Barnaföldi, Gergely Gábor, Jakovác, Antal
    Cornell University
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    Title: FRG Approach to Nuclear Matter at Extreme Conditions
    Author: Pósfay, Péter; Barnaföldi, Gergely Gábor; Jakovác, Antal
    Subject: High Energy Physics - Phenomenology ; Nuclear Theory
    Description: Functional renormalization group (FRG) is an exact method for taking into account the effect of quantum fluctuations in the effective action of the system. The FRG method applied to effective theories of nuclear matter yields equation of state which incorporates quantum fluctuations of the fields. Using the local potential approximation (LPA) the equation of state for Walecka-type models of nuclear matter under extreme conditions could be determined. These models can be tested by solving the corresponding Tolman--Oppenheimer--Volkov (TOV) equations and investigating the properties (mass and radius) of the corresponding compact star models. Here, we present the first steps on this way, we obtained a Maxwell construction within the FRG-based framework using a Walecka-type Lagrangian. Comment: 6 pages, 3 figures
    Identifier: 1510.04906 (ARXIV ID)

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    Near and Far from Equilibrium Power-Law Statistics

    Biro, Tamas, Barnafoldi, Gergely, Biro, Gabor, Shen, Ke
    arXiv.org, Aug 12, 2016 [Peer Reviewed Journal]

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    Disentangling Soft and Hard Hadron Yields in PbPb Collisions at \(\sqrt{s_{NN}}\) = 2.76 ATeV

    Urmossy, Karoly, Biró, Tamás, Barnaföldi, Gergely, Xu, Zhangbu
    arXiv.org, May 16, 2014
    © ProQuest LLC All rights reserved, Engineering Database, Publicly Available Content Database, ProQuest Engineering Collection, ProQuest Technology Collection, ProQuest SciTech Collection, Materials Science & Engineering Database, ProQuest Central (new), ProQuest Central Korea, SciTech Premium Collection, Technology Collection, ProQuest Central Essentials, ProQuest One Academic, Engineering Collection (ProQuest)
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    Title: Disentangling Soft and Hard Hadron Yields in PbPb Collisions at \(\sqrt{s_{NN}}\) = 2.76 ATeV
    Author: Urmossy, Karoly; Biró, Tamás; Barnaföldi, Gergely; Xu, Zhangbu
    Contributor: Xu, Zhangbu (pacrepositoryorg)
    Subject: Quarks ; Anisotropy ; Hadrons ; Quantum Chromodynamics ; Ionic Collisions
    Description: We demonstrate that charged pion spectra in central and peripheral PbPb collisions at \(\sqrt{s}\) = 2.76 ATeV obtained via perturbative quantum chromodynamics improved parton model calculations [17] can be approximated by the Tsallis distribution for transverse momenta \(p_T \geq\) 4 GeV/c. Then, we propose a model in which, hadrons produced in heavy-ion collisions stem either from "soft" or "hard" processes, and are distributed according to the Tsallis distribution in both types of yields. We describe transverse spectra as well as azimuthal anisotropy (\(v_2\)) of charged hadrons stemming from various centrality PbPb collisions at \(\sqrt{s}\) = 2.76 ATeV [40,41,42] analytically. In addition, we find that the anisotropy decreases for more central collisions.
    Is part of: arXiv.org, May 16, 2014
    Identifier: 2331-8422 (E-ISSN)

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    Underlying Event Studies for LHC Energies

    Barnaföldi, Gergely Gábor, Agócs, András G., Lévai, Péter
    AIP Conf.Proc.1348:124-129,2011 [Peer Reviewed Journal]

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    The Effect of Quantum Fluctuations in the High-Energy Cold Nuclear Equation of State and in Compact Star Observables

    Pósfay, Péter, Barnaföldi, Gergely Gábor, Jakovác, Antal
    Phys. Rev. C 97, 025803 (2018) [Peer Reviewed Journal]

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    On the Way to Future's High Energy Particle Physics Transport Code

    Bíró, Gábor, Barnaföldi, Gergely Gábor, Futó, Endre
    Cornell University
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    Title: On the Way to Future's High Energy Particle Physics Transport Code
    Author: Bíró, Gábor; Barnaföldi, Gergely Gábor; Futó, Endre
    Subject: Computer Science - Distributed, Parallel, And Cluster Computing ; Physics - Computational Physics
    Description: High Energy Physics (HEP) needs a huge amount of computing resources. In addition data acquisition, transfer, and analysis require a well developed infrastructure too. In order to prove new physics disciplines it is required to higher the luminosity of the accelerator facilities, which produce more-and-more data in the experimental detectors. Both testing new theories and detector R&D are based on complex simulations. Today have already reach that level, the Monte Carlo detector simulation takes much more time than real data collection. This is why speed up of the calculations and simulations became important in the HEP community. The Geant Vector Prototype (GeantV) project aims to optimize the most-used particle transport code applying parallel computing and to exploit the capabilities of the modern CPU and GPU architectures as well. With the maximized concurrency at multiple levels the GeantV is intended to be the successor of the Geant4 particle transport code that has been used since two decades successfully. Here we present our latest result on the GeantV tests performances, comparing CPU/GPU based vectorized GeantV geometrical code to the Geant4 version.
    Identifier: 1512.06637 (ARXIV ID)