تقرير
Azimuthal dependence of two-particle transverse momentum current correlations
| العنوان: | Azimuthal dependence of two-particle transverse momentum current correlations |
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| المؤلفون: | Magdy, Niseem, Basu, Sumit, Gonzalez, Victor, Marin, Ana, Evdokimov, Olga, Lacey, Roy A., Pruneau, Claude |
| سنة النشر: | 2021 |
| المجموعة: | High Energy Physics - Phenomenology Nuclear Experiment Nuclear Theory |
| مصطلحات موضوعية: | Nuclear Theory, High Energy Physics - Phenomenology, Nuclear Experiment |
| الوصف: | 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 $G_{2}\left(\Delta\eta,\Delta\varphi\right)$ is of particular interest for its potential sensitivity to the shear viscosity per unit of entropy density $\eta/s$ of the quark-gluon plasma formed in heavy-ion collisions. We use the UrQMD, AMPT, and EPOS models for Au--Au at $\sqrt{s_{\rm NN}}$ = 200~GeV and Pb--Pb at $\sqrt{s_{\rm NN}}$ = 2760~GeV to investigate the long range azimuthal dependence of $G_{2}\left(\Delta\eta,\Delta\varphi\right)$, and explore its utility to constrain $\eta/s$ based on charged particle correlations. We find that the three models yield quantitatively distinct transverse momentum Fourier harmonics coefficients $a^{p_{\rm T}}_{\rm n}$. We also observe these coefficients exhibit a significant dependence on $\eta/s$ in the context of the AMPT model. These observations suggest that exhaustive measurements of the dependence of $G_{2}\left(\Delta\varphi \right)$ 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 $G_{2}\left(\Delta\varphi \right)$ obtained in large and small systems should also be instrumental in establishing new constraints for precise extraction of $\eta/s$. Comment: 9 pages, 5 figures, submitted for publication |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1140/epjc/s10052-021-09568-w |
| URL الوصول: | http://arxiv.org/abs/2105.07912 |
| رقم الأكسشن: | edsarx.2105.07912 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1140/epjc/s10052-021-09568-w |
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