Azimuthal dependence of two-particle transverse momentum current correlations
Abstract Two-particle transverse momentum correlation functions are a powerful technique for understanding the dynamics of relativistic heavy-ion collisions. Among these, the transverse momentum correlator $$G_{2}\left( \varDelta \eta ,\varDelta \varphi \right) $$ G 2 Δ η , Δ φ is of particular inte...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2021-08-01
|
| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-021-09568-w |
| _version_ | 1818608940784549888 |
|---|---|
| author | Niseem Magdy Sumit Basu Victor Gonzalez Ana Marin Olga Evdokimov Roy A. Lacey Claude Pruneau |
| author_facet | Niseem Magdy Sumit Basu Victor Gonzalez Ana Marin Olga Evdokimov Roy A. Lacey Claude Pruneau |
| author_sort | Niseem Magdy |
| collection | DOAJ |
| description | Abstract Two-particle transverse momentum correlation functions are a powerful technique for understanding the dynamics of relativistic heavy-ion collisions. Among these, the transverse momentum correlator $$G_{2}\left( \varDelta \eta ,\varDelta \varphi \right) $$ G 2 Δ η , Δ φ is of particular interest for its potential sensitivity to the shear viscosity per unit of entropy density $$\eta /s$$ η / s of the quark-gluon plasma formed in heavy-ion collisions. We use the UrQMD, AMPT, and EPOS models for Au–Au at $$\sqrt{s_\mathrm{NN}}$$ s NN = 200 GeV and Pb–Pb at $$\sqrt{s_\mathrm{NN}}$$ s NN = 2760 GeV to investigate the long range azimuthal dependence of $$G_{2}\left( \varDelta \eta ,\varDelta \varphi \right) $$ G 2 Δ η , Δ φ , and explore its utility to constrain $$\eta /s$$ η / s based on charged particle correlations. We find that the three models yield quantitatively distinct transverse momentum Fourier harmonics coefficients $$a^{p_\mathrm{T}}_{n}$$ a n p T . We also observe these coefficients exhibit a significant dependence on $$\eta /s$$ η / s in the context of the AMPT model. These observations suggest that exhaustive measurements of the dependence of $$G_{2}\left( \varDelta \varphi \right) $$ G 2 Δ φ with collision energy, system size, collision centrality, in particular, offer the potential to distinguish between different theoretical models and their underlying assumptions. Exhaustive analyses of $$G_{2}\left( \varDelta \varphi \right) $$ G 2 Δ φ obtained in large and small systems should also be instrumental in establishing new constraints for precise extraction of $$\eta /s$$ η / s . |
| first_indexed | 2024-12-16T14:50:38Z |
| format | Article |
| id | doaj.art-67d3da5bc91e44c9ba1bea8b67020f5c |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-12-16T14:50:38Z |
| publishDate | 2021-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-67d3da5bc91e44c9ba1bea8b67020f5c2022-12-21T22:27:36ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522021-08-018181910.1140/epjc/s10052-021-09568-wAzimuthal dependence of two-particle transverse momentum current correlationsNiseem Magdy0Sumit Basu1Victor Gonzalez2Ana Marin3Olga Evdokimov4Roy A. Lacey5Claude Pruneau6Department of Physics, University of Illinois at ChicagoDivision of Particle Physics, Department of Physics, Lund UniversityDepartment of Physics and Astronomy, Wayne State UniversityResearch Division and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für SchwerionenforschungDepartment of Physics, University of Illinois at ChicagoDepartment of Chemistry, State University of New YorkDepartment of Physics and Astronomy, Wayne State UniversityAbstract Two-particle transverse momentum correlation functions are a powerful technique for understanding the dynamics of relativistic heavy-ion collisions. Among these, the transverse momentum correlator $$G_{2}\left( \varDelta \eta ,\varDelta \varphi \right) $$ G 2 Δ η , Δ φ is of particular interest for its potential sensitivity to the shear viscosity per unit of entropy density $$\eta /s$$ η / s of the quark-gluon plasma formed in heavy-ion collisions. We use the UrQMD, AMPT, and EPOS models for Au–Au at $$\sqrt{s_\mathrm{NN}}$$ s NN = 200 GeV and Pb–Pb at $$\sqrt{s_\mathrm{NN}}$$ s NN = 2760 GeV to investigate the long range azimuthal dependence of $$G_{2}\left( \varDelta \eta ,\varDelta \varphi \right) $$ G 2 Δ η , Δ φ , and explore its utility to constrain $$\eta /s$$ η / s based on charged particle correlations. We find that the three models yield quantitatively distinct transverse momentum Fourier harmonics coefficients $$a^{p_\mathrm{T}}_{n}$$ a n p T . We also observe these coefficients exhibit a significant dependence on $$\eta /s$$ η / s in the context of the AMPT model. These observations suggest that exhaustive measurements of the dependence of $$G_{2}\left( \varDelta \varphi \right) $$ G 2 Δ φ with collision energy, system size, collision centrality, in particular, offer the potential to distinguish between different theoretical models and their underlying assumptions. Exhaustive analyses of $$G_{2}\left( \varDelta \varphi \right) $$ G 2 Δ φ obtained in large and small systems should also be instrumental in establishing new constraints for precise extraction of $$\eta /s$$ η / s .https://doi.org/10.1140/epjc/s10052-021-09568-w |
| spellingShingle | Niseem Magdy Sumit Basu Victor Gonzalez Ana Marin Olga Evdokimov Roy A. Lacey Claude Pruneau Azimuthal dependence of two-particle transverse momentum current correlations European Physical Journal C: Particles and Fields |
| title | Azimuthal dependence of two-particle transverse momentum current correlations |
| title_full | Azimuthal dependence of two-particle transverse momentum current correlations |
| title_fullStr | Azimuthal dependence of two-particle transverse momentum current correlations |
| title_full_unstemmed | Azimuthal dependence of two-particle transverse momentum current correlations |
| title_short | Azimuthal dependence of two-particle transverse momentum current correlations |
| title_sort | azimuthal dependence of two particle transverse momentum current correlations |
| url | https://doi.org/10.1140/epjc/s10052-021-09568-w |
| work_keys_str_mv | AT niseemmagdy azimuthaldependenceoftwoparticletransversemomentumcurrentcorrelations AT sumitbasu azimuthaldependenceoftwoparticletransversemomentumcurrentcorrelations AT victorgonzalez azimuthaldependenceoftwoparticletransversemomentumcurrentcorrelations AT anamarin azimuthaldependenceoftwoparticletransversemomentumcurrentcorrelations AT olgaevdokimov azimuthaldependenceoftwoparticletransversemomentumcurrentcorrelations AT royalacey azimuthaldependenceoftwoparticletransversemomentumcurrentcorrelations AT claudepruneau azimuthaldependenceoftwoparticletransversemomentumcurrentcorrelations |