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Journal articles on the topic 'Production de quarkonia'

Author: Grafiati

Published: 1 March 2025

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1

Mattioli, Kara R. "Towards Experimental Confirmation of Quarkonia Melting in Quark–Gluon Plasma: A Review of Recent Measurements of Quarkonia Production in Relativistic Heavy-Ion Collisions." Symmetry 16, no. 2 (February 13, 2024): 225. http://dx.doi.org/10.3390/sym16020225.

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The dissociation, or “melting”, of heavy quarkonia states due to color charge screening is a predicted signature of quark–gluon plasma (QGP) formation, with a quarkonium state predicted to dissociate when the temperature of the medium is higher than the binding energy of the quarkonium state. A conclusive experimental observation of quarkonium melting coupled with a detailed theoretical understanding of the melting mechanism would enable the use of quarkonia states as temperature probes of the QGP, a long-sought goal in the field of relativistic heavy-ion collisions. However, the interpretation of quarkonia suppression measurements in heavy-ion collisions is complicated by numerous other cold nuclear matter effects that also result in the dissociation of bound quarkonia states. A comprehensive understanding of these cold nuclear matter effects is therefore needed in order to correctly interpret quarkonia production measurements in heavy-ion collisions and to observe the melting of quarkonium states experimentally. In this review, recent measurements of quarkonia production in pA and AA collisions and their state-of-the-art theoretical interpretations will be discussed, as well as the future measurements needed to further the knowledge of cold nuclear matter effects and realize a measurement of quarkonia melting in heavy-ion collisions.

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2

Zhao, Jiaxing. "Recent theoretical developments in quarkonia production in relativistic heavy ion collisions." EPJ Web of Conferences 316 (2025): 01013. https://doi.org/10.1051/epjconf/202531601013.

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Quarkonia are golden probes of heavy ion collisions that have attracted much attention from both experimental and theoretical perspectives. This paper will review recent theoretical studies on quarkonium thermal properties, with a particular focus on the heavy quark finite-temperature potential obtained by Lattice QCD and other approaches. Moreover, it will examine the advancements in the real-time evolution of quarkonia in heavy ion collisions.

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3

Fionda, F. "Quarkonium Production Measurements with the ALICE Detector at the LHC." Ukrainian Journal of Physics 64, no. 7 (September 17, 2019): 566. http://dx.doi.org/10.15407/ujpe64.7.566.

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In (ultra-)relativistic heavy-ion collisions, the strongly interactingmatter is predicted to undergo a phase transition into a plasma of deconfinedquarks and gluons (QGP) and quarkonia probe different aspects of this medium.However, the medium modification of quarkonium production includes also the contribution of cold nuclear matter effects (CNM), such as shadowing or nuclear break-up in addition to QGP effects. Proton--nucleus collisions, where no QGP is expected, are used to measure cold nuclear matter effects on quarkonium production. Vacuum production of quarkonia is modelled in proton--proton (pp) collisions, which are used as reference for both heavy-ion and proton--nucleus collisions. Besides serving as reference, results in pp collisions represent a benchmark test of QCD based models in both perturbative and non-perturbative regimes. The ALICE detector has unique capabilities at the LHC for measuring quarkonia down to zero transverse momentum. Measurements are carried out at both central and forward rapidity, in the dielectron and dimuon decay channel, respectively. In this contribution the latest quarkonium measurements for various energies and colliding systems, performed by the ALICE Collaboration during the LHC Run-2 period, will be discussed.

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4

Castellanos, Javier Castillo. "Hidden heavy flavour production in heavy-ion collisions." EPJ Web of Conferences 171 (2018): 04002. http://dx.doi.org/10.1051/epjconf/201817104002.

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An overview of recent experimental results on quarkonium production in heavy-ion collisions at RHIC and LHC energies is presented. Their implications in the theoretical understanding of the production of quarkonia is discussed.

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5

SHEN, XIAOYAN. "HEAVY FLAVOR, QUARKONIUM PRODUCTION AND DECAY." International Journal of Modern Physics A 21, no. 08n09 (April 10, 2006): 1710–23. http://dx.doi.org/10.1142/s0217751x06032708.

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Recent experimental results on quarkonium physics are reviewed. In particular, the new observed particles since last one or two years, such as X(1835), X(3872), X(3940), Y(3940) and Y(4260) are discussed, the latest data on double charmonium production, heavy hadron spectroscopy and quarkonia decays are presented.

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6

Nejad, S. Mohammad Moosavi, and Mahdi Delpasand. "Spin-dependent fragmentation functions of gluon splitting into heavy quarkonia considering three different scenarios." International Journal of Modern Physics A 30, no. 32 (November 17, 2015): 1550179. http://dx.doi.org/10.1142/s0217751x15501791.

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Heavy quarkonium production is a powerful implement to study the strong interaction dynamics and QCD theory. Fragmentation is the dominant production mechanism for heavy quarkonia with large transverse momentum. With the large heavy quark mass, the relative motion of the heavy quark pair inside a heavy quarkonium is effectively nonrelativistic and it is also well known that their fragmentation functions can be calculated in the perturbative QCD framework. Here, we analytically calculate the process-independent fragmentation functions for a gluon to split into the spin-singlet and spin-triplet [Formula: see text]-wave heavy quarkonia using three different scenarios. We will show that the fragmentation probability of the gluon into the spin-triplet bound-state is the biggest one.

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7

KANG, ZHONG-BO. "DOUBLE PARTON FRAGMENTATION FUNCTION AND ITS EVOLUTION IN QUARKONIUM PRODUCTION." International Journal of Modern Physics: Conference Series 25 (January 2014): 1460040. http://dx.doi.org/10.1142/s2010194514600404.

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We summarize the results of a recent study on a new perturbative QCD factorization formalism for the production of heavy quarkonia of large transverse momentum pT at collider energies. Such a new factorization formalism includes both the leading power (LP) and next-to-leading power (NLP) contributions to the cross section in the [Formula: see text] expansion for heavy quark mass mQ. For the NLP contribution, the so-called double parton fragmentation functions are involved, whose evolution equations have been derived. We estimate fragmentation functions in the non-relativistic QCD formalism, and found that their contribution reproduce the bulk of the large enhancement found in explicit NLO calculations in the color singlet model. Heavy quarkonia produced from NLP channels prefer longitudinal polarization, in contrast to the single parton fragmentation function. This might shed some light on the heavy quarkonium polarization puzzle.

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8

Celiberto, Francesco Giovanni. "Vector Quarkonia at the LHC with Jethad: A High-Energy Viewpoint." Universe 9, no. 7 (July 7, 2023): 324. http://dx.doi.org/10.3390/universe9070324.

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In this review, we discuss and extend the study of the inclusive production of vector quarkonia, J/ψ and Υ, emitted with large transverse momenta and rapidities at the LHC. We adopt the novel ZCW19+ determination of fragmentation functions to depict the quarkonium production mechanism at the next-to-leading level of perturbative QCD. This approach is based on the nonrelativistic QCD formalism well adapted to describe the formation of a quarkonium state from the collinear fragmentation of a gluon or a constituent heavy quark at the lowest energy scale. We rely upon the NLL/NLO+ hybrid high-energy and collinear factorization for differential cross-sections, where the collinear formalism is enhanced by the BFKL resummation of next-to-leading energy logarithms arising in the t-channel. We employ the method to analyze the behavior of the rapidity distributions for double-inclusive vector quarkonium and inclusive vector quarkonium plus jet emissions. We discover that the natural stability of the high-energy series, previously seen in observables sensitive to the emission of hadrons with heavy flavor detected in the rapidity acceptance of LHC barrel calorimeters, becomes even more manifest when these particles are tagged in forward regions covered by endcaps. Our findings present the important message that vector quarkonia at the LHC via hybrid factorization offer a unique chance to perform precision studies of high-energy QCD, as well as an intriguing opportunity to shed light on the quarkonium production puzzle.

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9

Leitch, M. J. "Quarkonia production at RHIC." Journal of Physics G: Nuclear and Particle Physics 32, no. 12 (November 17, 2006): S391—S399. http://dx.doi.org/10.1088/0954-3899/32/12/s48.

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10

Manca, G. "Quarkonia production at LHCb." International Journal of Modern Physics A 29, no. 11n12 (April 25, 2014): 1430014. http://dx.doi.org/10.1142/s0217751x14300142.

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11

Linden Levy, L. A. "Quarkonia production in collisions." Nuclear Physics B - Proceedings Supplements 214, no. 1 (May 2011): 69–72. http://dx.doi.org/10.1016/j.nuclphysbps.2011.03.060.

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12

Cho, Peter, and Adam K. Leibovich. "Color-octet quarkonia production." Physical Review D 53, no. 1 (January 1, 1996): 150–62. http://dx.doi.org/10.1103/physrevd.53.150.

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13

Papadimitriou, Vaia. "Quarkonia Production at CDF." International Journal of Modern Physics A 12, no. 22 (September 10, 1997): 3867–76. http://dx.doi.org/10.1142/s0217751x97002024.

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In this paper we present results on J/ψ, ψ(2S), χc and ϒ production at [Formula: see text]. These results were obtained from data taken with the CDF detector at Fermilab. We cover recently completed analyses of the 1992-95 collider run. We find an excess of J/ψ, ψ(2S) and ϒ production compared with the predictions from the Color Singlet Model. Prospects for the near future are also discussed.

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14

Massacrier, Laure. "Measurements of quarkonia production." EPJ Web of Conferences 316 (2025): 01014. https://doi.org/10.1051/epjconf/202531601014.

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Quarkonium production in high-energy hadronic collisions is a useful tool to investigate fundamental aspects of Quantum Chromodynamics, from the proton and nucleus structure to deconfinement and the properties of the Quark Gluon Plasma (QGP). In these proceedings, emphasis is made on few recent quarkonium results from the RHIC and LHC colliders in proton-proton (pp), proton-nucleus (p-A) and nucleus-nucleus (A-A) collisions. In addition, results for some key observables are compiled to discuss the state-of-the-art in quarkonium production, with a focus on quarkonium hadroproduction.

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15

Sadek Finot, Rita. "Quarkonium production and elliptic flow in small systems measured with ALICE." EPJ Web of Conferences 276 (2023): 02010. http://dx.doi.org/10.1051/epjconf/202327602010.

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Abstract. Quarkonium production in hadronic collisions provides a unique testing ground for understanding quantum chromodynamics (QCD) since it involves both perturbative and non-perturbative regimes of this theory. A variety of experimental observables, such as the production cross-section, polarization, particle correlations, serve as insights into the phenomenology of the quarkonium production and help constrain the theoretical models. Measurements of quarkonia as a function of multiplicity probe multiple parton interactions (MPI), i.e., several parton-parton interactions occurring in a single hadron-hadron collision. Finally, measurements of the azimuthal correlation structure of emitted particles in high multiplicity pp collisions can probe the existence of collective behaviour in small systems. The ALICE detector can reconstruct inclusive quarkonia over a broad kinematical range, spanning from mid-rapidity up to forward rapidity, and down to zero transverse momentum. In addition, at midrapidity, the non-prompt charmonium contribution can be separated from the prompt contribution. In these proceedings, we present new results on the inclusive, prompt and non-prompt J/ψ production cross sections measured by ALICE in pp collisions at different collision energies. The self-normalized ψ(2S)-to-J/ψ yield ratio measurement is investigated as a function of the charged particle multiplicity in pp collisions at √S = 13. TeV. Finally, the first measurement of the J/ψ elliptic flow (v2) in high multiplicity pp collisions at √S = 13. TeV is presented. Results will be compared to theoretical models.

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16

Krätschmer, Ilse. "Quarkonium production measurements and searches for exotic quarkonia at CMS." Journal of Physics: Conference Series 556 (November 26, 2014): 012012. http://dx.doi.org/10.1088/1742-6596/556/1/012012.

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17

Kharlov, Yuri, Yeghishe Hambardzumyan, and Antony Varlamov. "Probing the Hot QCD Matter via Quarkonia at the Next-Generation Heavy-Ion Experiment at LHC." Particles 6, no. 2 (May 2, 2023): 546–55. http://dx.doi.org/10.3390/particles6020030.

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Quarkonia represent one of the most valuable probes of the deconfined quark–gluon hot medium since the very first experimental studies with ultrarelativistic heavy-ion collisions. A significant step forward in characterizing the QCD matter via systematic studies of quarkonia production will be performed by the next-generation heavy-ion experiment ALICE 3, a successor of the ongoing ALICE experiment at the Large Hadron Collider. The new advanced detector of ALICE 3 will allow for exploring the production of S- and P-state quarkonia at high statistics, at low and moderate transverse momenta ranges. The performance of ALICE 3 for quarkonia measurements and the requirements for the detectors are discussed.

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18

Vértesi, Róbert. "Production of quarkonia at RHIC." International Journal of Modern Physics A 31, no. 28n29 (October 19, 2016): 1645036. http://dx.doi.org/10.1142/s0217751x16450366.

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The production of different quarkonium states provides unique insight to the hot and cold nuclear matter effects in the strongly interacting medium that is formed in high energy heavy ion collisions. While LHC explores the energy frontier, RHIC has a broad physics program to explore the nuclear modification at different energies in a wide range of systems. Some of the most interesting recent results on [Formula: see text] and [Formula: see text]production in p+p, d+Au and A+A collisions from PHENIX and STAR are summarized in this work.

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19

Cho, Peter, and Adam K. Leibovich. "Color-octet quarkonia production. II." Physical Review D 53, no. 11 (June 1, 1996): 6203–17. http://dx.doi.org/10.1103/physrevd.53.6203.

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20

Wolf, Stefan. "Kinematic effects in quarkonia production." Nuclear Physics B - Proceedings Supplements 93, no. 1-3 (March 2001): 172–75. http://dx.doi.org/10.1016/s0920-5632(00)01097-5.

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21

Gastmans, R., W. Troost, and Tai Tsun Wu. "Heavy quarkonia production from gluons." Nuclear Physics B - Proceedings Supplements 1, no. 2 (March 1988): 259–63. http://dx.doi.org/10.1016/0920-5632(88)90341-6.

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22

Trzeciak, Barbara. "Quarkonia production in the STAR experiment." EPJ Web of Conferences 95 (2015): 04070. http://dx.doi.org/10.1051/epjconf/20159504070.

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23

Krenz, N., H. van Hees, and C. Greiner. "Quarkonia production in a Langevin approach." Journal of Physics: Conference Series 1070 (August 2018): 012008. http://dx.doi.org/10.1088/1742-6596/1070/1/012008.

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24

Powell, Christopher Beresford. "Quarkonia production at the STAR detector." Journal of Physics: Conference Series 455 (August 6, 2013): 012038. http://dx.doi.org/10.1088/1742-6596/455/1/012038.

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25

Trzeciak, Barbara. "Quarkonia production in the STAR experiment." Nuclear Physics A 904-905 (May 2013): 607c—610c. http://dx.doi.org/10.1016/j.nuclphysa.2013.02.087.

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26

Polini, A. "Production of heavy quarkonia at HERA." Nuclear Physics B - Proceedings Supplements 93, no. 1-3 (March 2001): 157–60. http://dx.doi.org/10.1016/s0920-5632(00)01091-4.

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27

Ko, Che Ming, Kyongchol Han, and Taesoo Song. "Quarkonia production in heavy ion collisions." Nuclear Physics A 910-911 (August 2013): 474–77. http://dx.doi.org/10.1016/j.nuclphysa.2012.12.047.

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28

Gastmans, R., W. Troost, and Tai Tsun Wu. "Production of heavy quarkonia from gluons." Nuclear Physics B 291 (January 1987): 731–45. http://dx.doi.org/10.1016/0550-3213(87)90493-7.

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29

McKibben Lofnes, Ingrid. "Quarkonia as probes of the QGP and of the initial stages of the heavy-ion collision with ALICE." EPJ Web of Conferences 259 (2022): 12004. http://dx.doi.org/10.1051/epjconf/202225912004.

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Studies of quarkonium production in heavy-ion collisions can be used for probing QGP properties. The suppression and regeneration of bound quarkonium states is sensitive to the medium properties. Modifications of the quarkonium polarization in Pb–Pb collisions with respect to pp collisions may give further insight into the suppression and regeneration mechanisms in the QGP. Quarkonia are also sensitive to the initial stages of heavy-ion collisions, and measurements in photonuclear collisions may help constrain the nuclear gluon-distribution at low Bjorken-x. In this work, recent quarkonium measurements performed by ALICE in Pb–Pb collisions at √SNN = 5.02 TeV will be discussed. Preliminary measurements of the inclusive J/ψ RAA measured at both forward and central rapidity will be presented. The J/ψ polarization measured for the first time in Pb–Pb collisions, as well as preliminary measurements of the coherent J/ψ photoproduction cross section, will be discussed.

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30

Wang, Yan. "Beam energy and system size dependence of heavy flavor production at STAR." EPJ Web of Conferences 296 (2024): 09004. http://dx.doi.org/10.1051/epjconf/202429609004.

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We report the measurements of quarkonia (J/ψ and ψ(2S)) in heavyion collisions via the e+e− decay channel at midrapidity (|y| < 1) by the STAR experiment. The centrality and transverse momentum dependence of the yield ratio of ψ(2S) to J/ψ is measured for the first time in heavy-ion collisions at RHIC. These results, together with the new measurement of collision energy dependence of inclusive J/ψ suppression in Au+Au collisions, allow for a systematic study of the quarkonium production in the medium. In addition, we present the first measurement of J/ψ polarization in heavy-ion collisions at RHIC in both the Helicity and the Collins-Soper frames, which provides a new insight for studying the properties of the Quark-Gluon Plasma created in heavy-ion collisions.

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31

Kang, Youen. "Recent conventional and exotic charmonia results from LHCb." EPJ Web of Conferences 316 (2025): 04010. https://doi.org/10.1051/epjconf/202531604010.

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Quarkonia production in heavy-ion collisions is an important experimental probe that sheds light on the heavy quark interaction with the nuclear medium. The bound quarkonium states undergo dissociation and recombination in PbPb collisions, where they can also experience the initial and final state effects such as shadowing and co-mover breakup. With the large datasets of pp and pPb collisions, and excellent vertexing capabilities allowing separation of the prompt and b-decay components, LHCb performs precise measurements of J/ψ, ψ(2S ) and, for the first time at the LHC, χc production and modification in small collision systems. This contribution will discuss these results, along with the first measurement of the nuclear modification factor of the exotic χc1(3872).

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32

Kukral, Ota. "Studies of the relative suppression of excited quarkonium states with CMS." EPJ Web of Conferences 296 (2024): 09013. http://dx.doi.org/10.1051/epjconf/202429609013.

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One of the findings of the LHC heavy ion program is the observation of stronger suppression of the excited quarkonium states compared to the ground states in lead-lead (PbPb) and proton-lead (pPb) collisions. Such differences among the states may imply dissociation effects occurring at late stages, after the evolution of heavy quark pairs into well-defined physical states. The variety of binding energies within the quarkonia families offers an experimental tool to characterize the phenomena at play. Measuring the excited states is crucial as they represent significant feed-down contributions to the production of the ground states and must be accounted for in the interpretation of the data. We present studies of the relative suppression of quarkonia in pPb and PbPb collisions performed by CMS. For the first time, the nuclear modification factor has been extended to the strongly suppressed Υ(3S) state. Moreover, nuclear modification factors as well as excited-to-ground state cross section ratios are measured as a function of particle transverse momentum and rapidity, and event activity. The results are compared with several model calculations incorporating initial- and final-state effects.

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33

Spengler, Joachim, and (for the HERA-B. Collaboration). "Quarkonia production with the HERA-B experiment." Journal of Physics G: Nuclear and Particle Physics 30, no. 8 (July 20, 2004): S871—S878. http://dx.doi.org/10.1088/0954-3899/30/8/028.

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34

de Cassagnac, Raphaël Granier. "Quarkonia production in cold and hot matters." Journal of Physics G: Nuclear and Particle Physics 35, no. 10 (September 17, 2008): 104023. http://dx.doi.org/10.1088/0954-3899/35/10/104023.

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35

Ko, Che Ming, Kyongchol Han, and Taesoo Song. "Quarkonia production in relativistic heavy ion collisions." Journal of Physics: Conference Series 422 (March 28, 2013): 012006. http://dx.doi.org/10.1088/1742-6596/422/1/012006.

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36

Müller, Katharina. "Heavy Flavour and Quarkonia production at LHCb." Journal of Physics: Conference Series 878 (July 2017): 012010. http://dx.doi.org/10.1088/1742-6596/878/1/012010.

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37

Müller, Katharina. "Heavy Flavour and Quarkonia production at LHCb." Journal of Physics: Conference Series 878 (July 2017): 012011. http://dx.doi.org/10.1088/1742-6596/878/1/012011.

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38

Chiappetta, P., and P. Mèry. "Soft-gluon emission in heavy-quarkonia production." Physical Review D 32, no. 9 (November 1, 1985): 2337–42. http://dx.doi.org/10.1103/physrevd.32.2337.

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39

Likhoded, A. K., A. V. Luchinsky, and S. V. Poslavsky. "Production of heavy quarkonia in hadronic experiments." Physics of Atomic Nuclei 78, no. 9 (December 2015): 1056–65. http://dx.doi.org/10.1134/s1063778815090100.

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40

PAPADIMITRIOU, VAIA. "QUARKONIA PRODUCTION AND POLARIZATION STUDIES WITH CDF." International Journal of Modern Physics A 16, supp01a (October 2001): 160–66. http://dx.doi.org/10.1142/s0217751x01006383.

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In this paper we present results on production and polarization of the J/ψ, ψ(2S), χc, ϒ and χb states at [Formula: see text]. These results were obtained from data taken with the CDF detector at Fermilab. We cover recently completed analyses of the 1992-96 collider run.

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41

Jakoubek, T. "Production of beauty and quarkonia in ATLAS." Journal of Physics: Conference Series 455 (August 6, 2013): 012018. http://dx.doi.org/10.1088/1742-6596/455/1/012018.

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42

Schuler, Gerhard A. "Production of heavy quarks and heavy quarkonia." Zeitschrift f�r Physik C Particles and Fields 71, no. 2 (June 1, 1996): 317–27. http://dx.doi.org/10.1007/s002880050177.

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43

Lansberg, Jean-Philippe. "New observables in inclusive production of quarkonia." Physics Reports 889 (December 2020): 1–106. http://dx.doi.org/10.1016/j.physrep.2020.08.007.

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44

Dahms, Torsten. "Quarkonia and heavy-flavour production in CMS." Nuclear Physics A 910-911 (August 2013): 91–97. http://dx.doi.org/10.1016/j.nuclphysa.2012.12.017.

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45

Likhoded, A. K., A. V. Luchinsky, and S. V. Poslavsky. "Production of heavy quarkonia in hadronic experiments." JETP Letters 105, no. 11 (June 2017): 739–51. http://dx.doi.org/10.1134/s002136401711008x.

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46

Schuler, Gerhard A. "Production of heavy quarks and heavy quarkonia." Zeitschrift für Physik C: Particles and Fields 71, no. 2 (June 1996): 317–27. http://dx.doi.org/10.1007/bf02906990.

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47

Chang (Zhao-Xi Zhang), Chao-Hsi. "Production and decay of the meson Bc." International Journal of Modern Physics A 21, no. 04 (February 10, 2006): 777–84. http://dx.doi.org/10.1142/s0217751x06032022.

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Studies on the decay and production of [Formula: see text] meson are briefly reviewed. Considering RUN-II of Tevatron and the schedule of LHC, the theoretical studies of Bc meson will jump to a new stage not only for itself but also to implement the studies of the heavy quarkonia etc.

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48

Schäfer, Wolfgang. "Production of quarkonium pairs in high-energy proton-proton collisions." EPJ Web of Conferences 199 (2019): 01021. http://dx.doi.org/10.1051/epjconf/201919901021.

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Recently there has been much interest in the pair production of quarkonia (charmonia, bottomonia). There are two main motivations behind these studies: first, these processes may help to differentiate between different proposed production mechanisms via color-octet and color-singlet QQ̄ -pair production. Second, the production of quarkonium pairs is expected to receive an important contribution from double parton scattering (DPS) processes. There remain a number of open problems, especially with the CMS and ATLAS data. In the kinematics of these experiments, the leading order of $O\left( {\alpha _S^4} \right)$ is clearly not sufficient. The double parton scattering (DPS) contribution was claimed to be large or even dominant in some corners of the phase space, when the rapidity distance Δy between two J/ψ mesons is large. However the effective cross sections σeff found from empirical analyses are about a factor 2.5 smaller than the usually accepted σeff = 15 mb. Here we discuss, which single-parton-scattering mechanisms can mimic the behavior of DPS induced production. Here especially the production of χ-pairs is important.

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49

Liu, Yunpeng, Kai Zhou, and Pengfei Zhuang. "Quarkonia in high energy nuclear collisions." International Journal of Modern Physics E 24, no. 11 (November 2015): 1530015. http://dx.doi.org/10.1142/s0218301315300155.

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We first review the cold and hot nuclear matter effects on quarkonium production in high energy collisions, then discuss three kinds of models to describe the quarkonium suppression and regeneration: the sequential dissociation, the statistical production and the transport approach, and finally make comparisons between the models and the experimental data from heavy ion collisions at SPS, RHIC and LHC energies.

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50

Krenz, Nadja, Hendrik van Hees, and Carsten Greiner. "Quarkonia Production and Dissociation in a Langevin Approach." Proceedings 10, no. 1 (April 17, 2019): 30. http://dx.doi.org/10.3390/proceedings2019010030.

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Abstract:

We aim to describe the process of dissociation and recombination of quarkonia in the quark-gluon plasma. Therefore we developed a model which allows to observe the time evolution of a system with various numbers of charm-anticharm-quark pairs at different temperatures. The motion of the heavy quarks is realized within a Langevin approach. We use a simplified version of a formalism developed by Blaizot et al. in which an Abelian plasma is considered where the heavy quarks interact over a Coulomb like potential. We have demonstrated, that the system reaches the expected thermal distribution in the equilibrium limit.

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