Bottomonium spectroscopy in the quark-gluon plasma
The spectroscopic properties of heavy quarkonia are substantially different in the quark-gluon plasma (QGP) that is created in relativistic heavy-ion collisions as compared to the vacuum situation that can be tested in pppp<math display="inline" overflow="scroll" altimg="...
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
14 October 2020
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International journal of modern physics. A, Particles and fields, gravitation, cosmology
Year: 2020, Jahrgang: 35, Heft: 29 |
| ISSN: | 1793-656X |
| DOI: | 10.1142/S0217751X20300161 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1142/S0217751X20300161 Verlag, lizenzpflichtig, Volltext: https://www.worldscientific.com/doi/abs/10.1142/S0217751X20300161 
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| Verfasserangaben: | Georg Wolschin |
| Zusammenfassung: | The spectroscopic properties of heavy quarkonia are substantially different in the quark-gluon plasma (QGP) that is created in relativistic heavy-ion collisions as compared to the vacuum situation that can be tested in pppp<math display="inline" overflow="scroll" altimg="eq-00001.gif"><mi>p</mi><mi>p</mi></math> collisions at the same center-of-mass energy. In this paper, a series of recent works about the dissociation of the Υ(nS)Υ(nS)<math display="inline" overflow="scroll" altimg="eq-00002.gif"><mi mathvariant="normal">Υ</mi><mo class="MathClass-open" stretchy="false">(</mo><mi>n</mi><mi>S</mi><mo class="MathClass-close" stretchy="false">)</mo></math> and χb(nP)χb(nP)<math display="inline" overflow="scroll" altimg="eq-00003.gif"><msub><mrow><mi>χ</mi></mrow><mrow><mi>b</mi></mrow></msub><mo class="MathClass-open" stretchy="false">(</mo><mi>n</mi><mi>P</mi><mo class="MathClass-close" stretchy="false">)</mo></math> states in the hot QGP are summarized. Quarkonia dissociation occurs due to (1) screening of the real quark-antiquark potential, (2) collisional damping through the imaginary part of the potential, and (3) gluon-induced dissociation. In addition, reduced feed-down plays a decisive role for the spin-triplet ground state. Transverse-momentum and centrality-dependent data are well reproduced in Pb-Pb collisions at LHC energies. In the asymmetric pp<math display="inline" overflow="scroll" altimg="eq-00004.gif"><mi>p</mi></math>-Pb system, alterations of the parton density functions in the lead nucleus account for the leading fraction of the modifications in cold nuclear matter (CNM), but the hot-medium effects turn out to be relevant in spite of the small initial spatial extent of the fireball, providing additional evidence for the generation of a quark-gluon droplet. |
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| Beschreibung: | Gesehen am 19.11.2020 |
| Beschreibung: | Online Resource |
| ISSN: | 1793-656X |
| DOI: | 10.1142/S0217751X20300161 |