The Experts below are selected from a list of 315 Experts worldwide ranked by ideXlab platform
Johann Rafelski - One of the best experts on this subject based on the ideXlab platform.
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Discovery of Quark-Gluon Plasma: Strangeness Diaries
The European Physical Journal Special Topics, 2020Co-Authors: Johann RafelskiAbstract:We look from a theoretical perspective at the new phase of matter, quark-gluon plasma (QGP), the new form of nuclear matter created at high temperature and pressure. Here I retrace the path to QGP discovery and its exploration in terms of Strangeness production and strange particle signatures. We will see the theoretical arguments that have been advanced to create interest in this determining signature of QGP. We explore the procedure used by several experimental groups making Strangeness production an important tool in the search and discovery of this primordial state of matter present in the Universe before matter in its present form was formed. We close by looking at both the ongoing research that increases the reach of this observable to LHC energy scale pp collisions, and propose an interpretation of these unexpected results.
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from Strangeness enhancement to quark gluon plasma discovery
International Journal of Modern Physics A, 2017Co-Authors: P Koch, Berndt Muller, Johann RafelskiAbstract:This is a short survey of signatures and characteristics of the quark–gluon plasma in the light of experimental results that have been obtained over the past three decades. In particular, we present an in-depth discussion of the Strangeness observable, including a chronology of the experimental effort to detect QGP at CERN-SPS, BNL-RHIC, and CERN-LHC.
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melting hadrons boiling quarks
European Physical Journal A, 2015Co-Authors: Johann RafelskiAbstract:In the context of the Hagedorn temperature half-centenary I describe our understanding of the hot phases of hadronic matter both below and above the Hagedorn temperature. The first part of the review addresses many frequently posed questions about properties of hadronic matter in different phases, phase transition and the exploration of quark-gluon plasma (QGP). The historical context of the discovery of QGP is shown and the role of Strangeness and strange antibaryon signature of QGP illustrated. In the second part I discuss the corresponding theoretical ideas and show how experimental results can be used to describe the properties of QGP at hadronization. The material of this review is complemented by two early and unpublished reports containing the prediction of the different forms of hadron matter, and of the formation of QGP in relativistic heavy ion collisions, including the discussion of Strangeness, and in particular strange antibaryon signature of QGP.
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heavy flavor hadrons in statistical hadronization of Strangeness rich qgp
European Physical Journal C, 2007Co-Authors: Inga Kuznetsova, Johann RafelskiAbstract:We study b and c quark hadronization from QGP. We obtain the yields of charm and bottom flavored hadrons within the statistical hadronization model. The important novel feature of this study is that we take into account the high Strangeness and entropy content of QGP, conserving the Strangeness and entropy yields at hadronization.
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hadrons and quark gluon plasma
2002Co-Authors: Jean Letessier, Johann RafelskiAbstract:Part I. A New Phase of Matter?: 1. Micro-bang: big bang in the laboratory 2. Hadrons 3. Vacuum as a physical medium 4. Statistical properties of hadronic matter Part II. Analysis Tools and Experiments: 5. Nuclei in collision 6. Understanding collision dynamics 7. Entropy and its relevance in heavy ion collisions Part III. Particle Production: 8. Particle spectra 9. Highlights of hadron production Part IV. Hot Hadronic Matter: 10. Relativistic gas 11. First look at hadronic gas 12. Hagedorn gas Part V. QCD, Hadronic Structure and High Temperature: 13. Hadronic structure and quantum chromodynamics 14. Perturbative QCD 15. Lattice quantum chromodynamics 16. Perturbative quark-gluon plasma Part VI. Strangeness: 17. Thermal flavor production in deconfined phase 18. Strangeness background 19. Hadron freeze-out analysis.
Krzysztof Redlich - One of the best experts on this subject based on the ideXlab platform.
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Strangeness fluctuations from k pi interactions
Physical Review D, 2015Co-Authors: Bengt Friman, Krzysztof Redlich, Pok Man Lo, Michal Marczenko, Chihiro SasakiAbstract:Motivated by recent lattice QCD studies, we explore the effects of interactions on Strangeness fluctuations in strongly interacting matter at finite temperature. We focus on S-wave $K\pi$ scattering and discuss the role of the $K_0^*(800)$ and $K^*(1430)$ resonances. The interaction contribution is obtained within the S-matrix formulation of thermodynamics, using the empirical $K\pi$ phase shifts as input. We find that the simplified treatment of the interactions in this channel, employed in the hadron resonance gas approach, leads to an overestimate of the Strangeness fluctuations. Thus, our calculation indicates that broad resonances must be treated with caution, when modeling QCD thermodynamics in the hadronic phase.
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canonical description of Strangeness enhancement from p a to pb pb collisions
Physics Letters B, 2000Co-Authors: Salah Hamieh, Krzysztof Redlich, Ahmed TounsiAbstract:Abstract We consider the production of strange particles in Pb–Pb and p–A collisions at the SPS energy reported by the WA97 experiment. We show that the observed enhancement of strange baryon and antibaryon yields in Pb–Pb collisions relative to p–Be and p–Pb can be explained in terms of the statistical model formulated in the canonical ensemble with respect to Strangeness conservation. The importance and the role of Strangeness under saturation is also discussed.
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Canonical Strangeness enhancement
Nuclear Physics, 1998Co-Authors: J. Sollfrank, F. Becattini, Krzysztof Redlich, Helmut SatzAbstract:Abstract According to recent experimental data and theoretical developments we discuss three distinct topics related to Strangeness enhancement in nuclear reactions. We investigate the compatibility of multi-strange particle ratios measured in a restricted phase space with thermal model parameters extracted recently in 4π. We study the canonical suppression as a possible reason for the observed Strangeness enhancement and argue that a connection between QGP formation and the undersaturation of Strangeness is not excluded.
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Canonical Strangeness enhancement
Nuclear Physics A, 1998Co-Authors: J. Sollfrank, F. Becattini, Krzysztof Redlich, Helmut SatzAbstract:According to recent experimental data and theoretical developments we discuss three distinct topics related to Strangeness enhancement in nuclear reactions. We investigate the compatibility of multi-strange particle ratios measured in a restricted phase space with thermal model parameters extracted recently in 4pi. We study the canonical suppression as a possible reason for the observed Strangeness enhancement and argue that a connection between QGP formation and the undersaturation of Strangeness is not excluded.Comment: 4 pages, Proceedings of Quark Matter 97, to be published in NP
Ahmed Tounsi - One of the best experts on this subject based on the ideXlab platform.
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canonical description of Strangeness enhancement from p a to pb pb collisions
Physics Letters B, 2000Co-Authors: Salah Hamieh, Krzysztof Redlich, Ahmed TounsiAbstract:Abstract We consider the production of strange particles in Pb–Pb and p–A collisions at the SPS energy reported by the WA97 experiment. We show that the observed enhancement of strange baryon and antibaryon yields in Pb–Pb collisions relative to p–Be and p–Pb can be explained in terms of the statistical model formulated in the canonical ensemble with respect to Strangeness conservation. The importance and the role of Strangeness under saturation is also discussed.
Tomofumi Nagae - One of the best experts on this subject based on the ideXlab platform.
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Hadron physics at J-PARC
Hyperfine Interactions, 2012Co-Authors: Tomofumi NagaeAbstract:At the hadron experimental hall of J-PARC, a lot of interesting experiments on Strangeness nuclear physics and hadron physics are going to be carried out. Here I introduce several examples, and report the status of the J-PARC.
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Strangeness in Nuclear Physics
Journal of Physics: Conference Series, 2011Co-Authors: Tomofumi NagaeAbstract:Strangeness degrees of freedom are not so evident in traditional low-energy nuclear physics. Some effects of strange (s) quarks as sea-quark components, , in a nucleon have been investigated in several measurements. However, their effects are found to be not so large. Strangeness is, somehow, hidden in nature. Nevertheless, it plays an important role when we discuss the QCD phase transitions at high temperature and/or high density. This is because the strange quark mass is close to the typical energy scale of QCD. The Strangeness can be explicitly implanted into a nucleus as the bound states of strange hadrons. By extending our scope of hadron many-body systems into flavor SU(3), the role of Strangeness in high density nuclear matter can be investigated. In this paper, I review the recent topics in the field of Strangeness nuclear physics and discuss future prospects in a new facility J-PARC.
R Caliandro - One of the best experts on this subject based on the ideXlab platform.
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Strangeness enhancements at central rapidity in 40 a gev c pb pb collisions
Journal of Physics G, 2010Co-Authors: F Antinori, P A Bacon, A Badala, R Barbera, A Belogianni, I J Bloodworth, M Bombara, Giuseppe Eugenio Bruno, S A Bull, R CaliandroAbstract:Results are presented on the production of K0S, hyperons and antihyperons in Pb–Pb and p–Be interactions at 40 GeV/c per nucleon. The enhancement pattern follows the same hierarchy as seen in the higher energy data—the enhancement increases with the Strangeness content of the hyperons and with the centrality of collision. The centrality dependence of the Pb–Pb yields and enhancements is steeper at 40 than at 158 A GeV/c. The energy dependence of Strangeness enhancements at mid-rapidity is discussed.
