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  1. Book ; Online: Fluctuations and correlations of baryonic chiral partners

    Koch, Volker / Marczenko, Michał / Redlich, Krzysztof / Sasaki, Chihiro

    2023  

    Abstract: Fluctuations and correlations of the net-baryon number play an important role in exploring critical phenomena in phase transitions of strongly interacting matter governed by Quantum chromodynamics (QCD). In this work, we use the parity doublet model to ... ...

    Abstract Fluctuations and correlations of the net-baryon number play an important role in exploring critical phenomena in phase transitions of strongly interacting matter governed by Quantum chromodynamics (QCD). In this work, we use the parity doublet model to investigate the fluctuations of the net-baryon number density in hot and dense hadronic matter. The model accounts for chiral criticality within the mean-field approximation. We focus on the qualitative properties and systematics of the first- and second-order susceptibility of the net-baryon number density, and their ratios for nucleons of positive and negative parity, as well as their correlator. We show that the fluctuations of the positive-parity nucleon do not necessarily reflect the fluctuations of the total net-baryon number density at the phase boundary of the chiral phase transition. We also investigate the non-trivial structure of the correlator. Furthermore, we discuss and quantify the differences between the fluctuations of the net-baryon number density in the vicinity of the chiral and liquid-gas phase transition in nuclear matter. We indicate a possible relevance of our results with the interpretation of the experimental data on net-proton number fluctuations in heavy-ion collisions.

    Comment: Matches published version
    Keywords High Energy Physics - Phenomenology ; Nuclear Theory
    Subject code 612
    Publishing date 2023-08-30
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Book ; Online: Reaching percolation and conformal limits in neutron stars

    Marczenko, Michał / McLerran, Larry / Redlich, Krzysztof / Sasaki, Chihiro

    2022  

    Abstract: Generating an ensemble of equations of state that fulfill multimessenger constraints, we statistically determine the properties of dense matter found inside neutron stars (NSs). We calculate the speed of sound and trace anomaly and demonstrate that they ... ...

    Abstract Generating an ensemble of equations of state that fulfill multimessenger constraints, we statistically determine the properties of dense matter found inside neutron stars (NSs). We calculate the speed of sound and trace anomaly and demonstrate that they are driven towards their conformal values at the center of maximally massive NSs. The local peak of the speed of sound is shown to be located at values of the energy and particle densities which are consistent with deconfinement and percolation conditions in QCD matter. We also analyze fluctuations of the net-baryon number density in the context of possible remnants of critical behavior. We find that the global maxima of the variance of these fluctuations emerge at densities beyond those found in the interiors of NSs.

    Comment: version accepted for publication in Physical Review C
    Keywords Nuclear Theory ; Astrophysics - High Energy Astrophysical Phenomena ; High Energy Physics - Phenomenology
    Subject code 612
    Publishing date 2022-07-26
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Book ; Online: Searching for the QCD critical point with net-proton number fluctuations

    Szymański, Michał / Bluhm, Marcus / Redlich, Krzysztof / Sasaki, Chihiro

    2019  

    Abstract: Net-proton number fluctuations can be measured experimentally and hence provide a source of important information about the matter created during relativistic heavy ion collisions. Particularly, they may give us clues about the conjectured QCD critical ... ...

    Abstract Net-proton number fluctuations can be measured experimentally and hence provide a source of important information about the matter created during relativistic heavy ion collisions. Particularly, they may give us clues about the conjectured QCD critical point. In this work the beam-energy dependence of ratios of the first four cumulants of the net-proton number is discussed. These quantities are calculated using a phenomenologically motivated model in which critical mode fluctuations couple to protons and anti-protons. Our model qualitatively captures both the monotonic behavior of the lowest-order ratio as well as the non-monotonic behavior of higher-order ratios, as seen in the experimental data from the STAR Collaboration. We also discuss the dependence of our results on the coupling strength and the location of the critical point.

    Comment: Proceedings of New Trends in High-Energy Physics conference, Odessa, Ukraine, May 12-18, 2019. 6 pages, 5 figures
    Keywords Nuclear Theory
    Subject code 612
    Publishing date 2019-07-18
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Book ; Online: Net-proton number fluctuations in the presence of the QCD critical point

    Szymański, Michał / Bluhm, Marcus / Redlich, Krzysztof / Sasaki, Chihiro

    2019  

    Abstract: Event-by-event fluctuations of the net-proton number studied in heavy-ion collisions provide an important means in the search for the conjectured chiral critical point (CP) in the QCD phase diagram. We propose a phenomenological model in which the ... ...

    Abstract Event-by-event fluctuations of the net-proton number studied in heavy-ion collisions provide an important means in the search for the conjectured chiral critical point (CP) in the QCD phase diagram. We propose a phenomenological model in which the fluctuations of the critical chiral mode couple to protons and anti-protons. This allows us to study the behavior of the net-proton number fluctuations in the presence of the CP. Calculating the net-proton number cumulants, $C_n$ with n=1,2,3,4, along the phenomenological freeze-out line we show that the ratio of variance and mean $C_2/C_1$, as well as kurtosis $C_4/C_2$ resemble qualitative properties observed in data in heavy-ion collisions as a function of beam energy obtained by the STAR Collaboration at RHIC. In particular, the non-monotonic structure of the kurtosis and smooth change of the $C_2/C_1$ ratio with beam energy could be due to the CP located near the freeze-out line. The skewness, however, exhibits properties that are in contrast to the criticality expected due to the CP. The dependence of our results on the model parameters and the proximity of the chemical freeze-out to the critical point are also discussed.
    Keywords Nuclear Theory ; High Energy Physics - Phenomenology
    Subject code 612
    Publishing date 2019-05-02
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Decoding the phase structure of QCD via particle production at high energy.

    Andronic, Anton / Braun-Munzinger, Peter / Redlich, Krzysztof / Stachel, Johanna

    Nature

    2018  Volume 561, Issue 7723, Page(s) 321–330

    Abstract: Recent studies based on lattice Monte Carlo simulations of quantum chromodynamics (QCD)-the theory of strong interactions-have demonstrated that at high temperature there is a phase change from confined hadronic matter to a deconfined quark-gluon plasma ... ...

    Abstract Recent studies based on lattice Monte Carlo simulations of quantum chromodynamics (QCD)-the theory of strong interactions-have demonstrated that at high temperature there is a phase change from confined hadronic matter to a deconfined quark-gluon plasma in which quarks and gluons can travel distances that greatly exceed the size of hadrons. Here we show that the phase structure of such strongly interacting matter can be decoded by analysing particle production in high-energy nuclear collisions within the framework of statistical hadronization, which accounts for the thermal distribution of particle species. Our results represent a phenomenological determination of the location of the phase boundary of strongly interacting matter, and imply quark-hadron duality at this boundary.
    Language English
    Publishing date 2018-09-19
    Publishing country England
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/s41586-018-0491-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Book: Conservation laws and particle production in heavy ion collisions

    Redlich, Krzysztof

    (GSI-Preprint ; 2001,17)

    2001  

    Institution Gesellschaft für Schwerionenforschung
    Author's details Gesellschaft für Schwerionenforschung mbH. K. Redlich
    Series title GSI-Preprint ; 2001,17
    Language English
    Size 13 S, graph. Darst
    Publisher GSI
    Publishing place Darmstadt
    Document type Book
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  7. Book: Strangeness production in heavy ion collisions

    Redlich, Krzysztof

    (GSI-Preprint ; 2001,14)

    2001  

    Author's details Krzysztof Redlich
    Series title GSI-Preprint ; 2001,14
    Language English
    Size 10 S, graph. Darst
    Publisher GSI
    Publishing place Darmstadt
    Document type Book
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  8. Book: Strangeness enhancement in heavy ion collisions

    Redlich, Krzysztof / Tounsi, Ahmed

    (GSI-Preprint ; 2001,16)

    2001  

    Author's details Krzysztof Redlich and Ahmed Tounsi
    Series title GSI-Preprint ; 2001,16
    Language English
    Size [2] Bl, graph. Darst
    Publisher GSI
    Publishing place Darmstadt
    Document type Book
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  9. Book: Particle production in heavy ion collisions

    Braun-Munzinger, Peter / Redlich, Krzysztof / Stachel, Johanna

    (GSI-Preprint ; 2003,13)

    2003  

    Author's details Peter Braun-Munzinger; Krzysztof Redlich; Johanna Stachel. Gesellschaft für Schwerionenforschung mbH
    Series title GSI-Preprint ; 2003,13
    Language English
    Size 109 S, graph. Darst, 30 cm
    Publisher GSI
    Publishing place Darmstadt
    Document type Book
    Note Literaturverz. S. 101 - 109
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  10. Book: Chemical equilibration of U(1) charged particles in a thermal environment

    Redlich, Krzysztof / Koch, Volker / Tounsi, Ahmed

    (GSI-Preprint ; 2001,28)

    2001  

    Author's details K. Redlich; V. Koch; A. Tounsi. GSI, Gesellschaft für Schwerionenforschung mbH
    Series title GSI-Preprint ; 2001,28
    Language English
    Size 7 S, graph. Darst, 30 cm
    Publisher GSI
    Publishing place Darmstadt
    Document type Book
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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