Non-equilibrium charmonium regeneration in strongly coupled quark-gluon plasma
The evaluation of quarkonium regeneration in ultrarelativistic heavy-ion collisions (URHICs) requires the knowledge of the heavy-quark phase space distributions in the expanding quark-gluon plasma (QGP) fireball. We employ a semi-classical charmonium transport approach where regeneration processes e...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-11-01
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| Series: | Physics Letters B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269322005482 |
| _version_ | 1811250579319554048 |
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| author | Xiaojian Du Ralf Rapp |
| author_facet | Xiaojian Du Ralf Rapp |
| author_sort | Xiaojian Du |
| collection | DOAJ |
| description | The evaluation of quarkonium regeneration in ultrarelativistic heavy-ion collisions (URHICs) requires the knowledge of the heavy-quark phase space distributions in the expanding quark-gluon plasma (QGP) fireball. We employ a semi-classical charmonium transport approach where regeneration processes explicitly account for the time-dependent spectra of charm quarks via Langevin simulations of their diffusion. The inelastic charmonium rates and charm-quark transport coefficients are computed from the same charm-medium interaction. The latter is modeled by perturbative rates, augmented with a K-factor to represent nonperturbative interaction strength and interference effect. Using central 5.02 TeV Pb-Pb collisions as a test case we find that a good description of the measured J/ψ yield and its transverse-momentum dependence can be achieved if a large K≳5 is employed while smaller values lead to marked discrepancies. This is in line with open-charm phenomenology in URHICs, where nonperturbative interactions of similar strength are required. Our approach establishes a common transport framework for a microscopic description of open and hidden heavy-flavor (HF) observables that incorporates both nonperturbative and non-equilibrium effects, and thus enhances the mutual constraints from experiment on the extraction of transport properties of the QGP. |
| first_indexed | 2024-04-12T16:06:44Z |
| format | Article |
| id | doaj.art-faff23b8630942e0b2d6814480796009 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-04-12T16:06:44Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-faff23b8630942e0b2d68144807960092022-12-22T03:26:02ZengElsevierPhysics Letters B0370-26932022-11-01834137414Non-equilibrium charmonium regeneration in strongly coupled quark-gluon plasmaXiaojian Du0Ralf Rapp1Fakultät fur Physik, Universität Bielefeld, D-33615 Bielefeld, Germany; Cyclotron Institute and Department of Physics & Astronomy, Texas A&M University, College Station, TX 77843-3366, USA; Corresponding author.Cyclotron Institute and Department of Physics & Astronomy, Texas A&M University, College Station, TX 77843-3366, USAThe evaluation of quarkonium regeneration in ultrarelativistic heavy-ion collisions (URHICs) requires the knowledge of the heavy-quark phase space distributions in the expanding quark-gluon plasma (QGP) fireball. We employ a semi-classical charmonium transport approach where regeneration processes explicitly account for the time-dependent spectra of charm quarks via Langevin simulations of their diffusion. The inelastic charmonium rates and charm-quark transport coefficients are computed from the same charm-medium interaction. The latter is modeled by perturbative rates, augmented with a K-factor to represent nonperturbative interaction strength and interference effect. Using central 5.02 TeV Pb-Pb collisions as a test case we find that a good description of the measured J/ψ yield and its transverse-momentum dependence can be achieved if a large K≳5 is employed while smaller values lead to marked discrepancies. This is in line with open-charm phenomenology in URHICs, where nonperturbative interactions of similar strength are required. Our approach establishes a common transport framework for a microscopic description of open and hidden heavy-flavor (HF) observables that incorporates both nonperturbative and non-equilibrium effects, and thus enhances the mutual constraints from experiment on the extraction of transport properties of the QGP.http://www.sciencedirect.com/science/article/pii/S0370269322005482Quark-gluon plasmaCharmonium transport approachCharm-quark diffusion |
| spellingShingle | Xiaojian Du Ralf Rapp Non-equilibrium charmonium regeneration in strongly coupled quark-gluon plasma Physics Letters B Quark-gluon plasma Charmonium transport approach Charm-quark diffusion |
| title | Non-equilibrium charmonium regeneration in strongly coupled quark-gluon plasma |
| title_full | Non-equilibrium charmonium regeneration in strongly coupled quark-gluon plasma |
| title_fullStr | Non-equilibrium charmonium regeneration in strongly coupled quark-gluon plasma |
| title_full_unstemmed | Non-equilibrium charmonium regeneration in strongly coupled quark-gluon plasma |
| title_short | Non-equilibrium charmonium regeneration in strongly coupled quark-gluon plasma |
| title_sort | non equilibrium charmonium regeneration in strongly coupled quark gluon plasma |
| topic | Quark-gluon plasma Charmonium transport approach Charm-quark diffusion |
| url | http://www.sciencedirect.com/science/article/pii/S0370269322005482 |
| work_keys_str_mv | AT xiaojiandu nonequilibriumcharmoniumregenerationinstronglycoupledquarkgluonplasma AT ralfrapp nonequilibriumcharmoniumregenerationinstronglycoupledquarkgluonplasma |