Phenomenological study of quarkonium suppression and the impact of the energy gap between singlets and octets
| Autor: | Blaizot, Jean-Paul, Escobedo, Miguel Ángel |
|---|---|
| Přispěvatelé: | Institut de Physique Théorique - UMR CNRS 3681 (IPHT), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
hard thermal loop approximation
heavy ion: scattering Octet Nuclear Theory [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] Band gap FOS: Physical sciences 01 natural sciences thermal Nuclear Theory (nucl-th) High Energy Physics - Phenomenology (hep-ph) quarkonium: heavy 0103 physical sciences Thermal potential: static Statistical physics 010306 general physics energy: gap quark gluon: plasma Physics Thermal equilibrium 010308 nuclear & particles physics High Energy Physics::Phenomenology nucleus quarkonium: suppression lattice field theory temperature singlet Lattice QCD Plasma Quarkonium 3. Good health High Energy Physics - Phenomenology Distribution (mathematics) [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] |
| Zdroj: | Physical Review D Physical Review D, American Physical Society, 2021, 104 (5), pp.054034. ⟨10.1103/PhysRevD.104.054034⟩ Physical Review Phys.Rev.D Phys.Rev.D, 2021, 104 (5), pp.054034. ⟨10.1103/PhysRevD.104.054034⟩ |
| ISSN: | 1550-7998 1550-2368 |
| DOI: | 10.1103/PhysRevD.104.054034⟩ |
| Popis: | The study of heavy quarkonium suppression in heavy-ion collisions represents an important source of information about the properties of the quark-gluon plasma produced in such collisions. In a previous paper, we have considered how to model the evolution of a quarkonium in such a way that the solution of the resulting equations evolves toward the correct thermal equilibrium distribution for an homogeneous and static medium. We found that it is crucial to take into account the energy gap between singlet and octet configurations when the temperature is not much greater than this energy gap. In this manuscript, we explore in more detail the phenomenological consequences of this observation in the more realistic situation of an expanding system. We consider two different scenarios, based on the same approximation scheme, but on different choices of parameters. In the first case, we rely on a Hard Thermal Loop approximation, while the second case is based on a recent determination of the static potential in lattice QCD. In both cases, we compute the decay width and the nuclear modification factor, both taking the energy gap into account and ignoring it. We find that the impact on the predictions is as large in the expanding medium as it is in the static case. Our conclusion is that this energy gap should be taken into account in phenomenological studies. Published version. 25 pages, 11 figures |
| Databáze: | OpenAIRE |
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