Probing QGP droplets with charmonium in high-multiplicity proton–proton collisions
Abstract We study the hot medium effects in high-multiplicity proton–proton (pp) collisions at $$\sqrt{s_{NN}}=13$$ s NN = 13 TeV via the charmonium probes. The hot medium is described with the hydrodynamic model, while charmonium evolutions in the medium are studied with a time-dependent Schrödinge...
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| Language: | English |
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SpringerOpen
2024-11-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-024-13599-4 |
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| author | Yunfan Bai Baoyi Chen |
| author_facet | Yunfan Bai Baoyi Chen |
| author_sort | Yunfan Bai |
| collection | DOAJ |
| description | Abstract We study the hot medium effects in high-multiplicity proton–proton (pp) collisions at $$\sqrt{s_{NN}}=13$$ s NN = 13 TeV via the charmonium probes. The hot medium is described with the hydrodynamic model, while charmonium evolutions in the medium are studied with a time-dependent Schrödinger equation. The hot medium dissociation on charmonium is considered with the temperature-dependent complex potential parametrized with the results from lattice QCD calculations. The ratio $$\sigma _{\psi (2S)}/\sigma _{J/\psi }$$ σ ψ ( 2 S ) / σ J / ψ of $$J/\psi $$ J / ψ and $$\psi (2S)$$ ψ ( 2 S ) production cross sections are calculated and compared with the LHCb experimental data in pp collisions. Our calculations explain the charmonium relative suppression in different transverse momentum and multiplicity bins. The suppression of this ratio is mainly affected by the effects of the deconfined medium. It is less affected by the initial effects before the generation of the heavy quark pair. We suggest this to be a clear signal of the small QGP droplets generated in high multiplicity pp collisions. |
| format | Article |
| id | doaj-art-2240a71792574cadb438c38b3a365e7e |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-2240a71792574cadb438c38b3a365e7e2024-12-29T12:42:38ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522024-11-0184111810.1140/epjc/s10052-024-13599-4Probing QGP droplets with charmonium in high-multiplicity proton–proton collisionsYunfan Bai0Baoyi Chen1Department of Physics, Imperial College LondonDepartment of Physics, Tianjin UniversityAbstract We study the hot medium effects in high-multiplicity proton–proton (pp) collisions at $$\sqrt{s_{NN}}=13$$ s NN = 13 TeV via the charmonium probes. The hot medium is described with the hydrodynamic model, while charmonium evolutions in the medium are studied with a time-dependent Schrödinger equation. The hot medium dissociation on charmonium is considered with the temperature-dependent complex potential parametrized with the results from lattice QCD calculations. The ratio $$\sigma _{\psi (2S)}/\sigma _{J/\psi }$$ σ ψ ( 2 S ) / σ J / ψ of $$J/\psi $$ J / ψ and $$\psi (2S)$$ ψ ( 2 S ) production cross sections are calculated and compared with the LHCb experimental data in pp collisions. Our calculations explain the charmonium relative suppression in different transverse momentum and multiplicity bins. The suppression of this ratio is mainly affected by the effects of the deconfined medium. It is less affected by the initial effects before the generation of the heavy quark pair. We suggest this to be a clear signal of the small QGP droplets generated in high multiplicity pp collisions.https://doi.org/10.1140/epjc/s10052-024-13599-4 |
| spellingShingle | Yunfan Bai Baoyi Chen Probing QGP droplets with charmonium in high-multiplicity proton–proton collisions European Physical Journal C: Particles and Fields |
| title | Probing QGP droplets with charmonium in high-multiplicity proton–proton collisions |
| title_full | Probing QGP droplets with charmonium in high-multiplicity proton–proton collisions |
| title_fullStr | Probing QGP droplets with charmonium in high-multiplicity proton–proton collisions |
| title_full_unstemmed | Probing QGP droplets with charmonium in high-multiplicity proton–proton collisions |
| title_short | Probing QGP droplets with charmonium in high-multiplicity proton–proton collisions |
| title_sort | probing qgp droplets with charmonium in high multiplicity proton proton collisions |
| url | https://doi.org/10.1140/epjc/s10052-024-13599-4 |
| work_keys_str_mv | AT yunfanbai probingqgpdropletswithcharmoniuminhighmultiplicityprotonprotoncollisions AT baoyichen probingqgpdropletswithcharmoniuminhighmultiplicityprotonprotoncollisions |