Skewness of mean transverse momentum fluctuations in heavy-ion collisions
| Autor: | Fernando G. Gardim, Jean-Yves Ollitrault, Jacquelyn Noronha-Hostler, Giuliano Giacalone |
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| 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), Universidade Federal de Alfenas, Department of Physics [Illinois at Urbana-Champaign, USA], University of Illinois at Urbana-Champaign [Urbana], University of Illinois System-University of Illinois System, INCT-FNA grant 464898/201, FAPESP grant 2018/2472, USP-COFECUB (grant Uc Ph 160-16, 2015, US-DOE Nuclear Science Grant No. de-sc0019 |
| Rok vydání: | 2021 |
| Předmět: |
Nuclear Theory
High Energy Physics::Lattice FOS: Physical sciences 01 natural sciences High Energy Physics - Experiment Nuclear Theory (nucl-th) High Energy Physics - Experiment (hep-ex) Mathematics::Group Theory High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences Positive skewness Statistical physics Nuclear Experiment (nucl-ex) Nuclear Experiment 010306 general physics Nuclear theory [PHYS]Physics [physics] Physics 010308 nuclear & particles physics High Energy Physics::Phenomenology Skew Collision Nonlinear Sciences::Chaotic Dynamics High Energy Physics - Phenomenology Distribution (mathematics) MESH: Nuclear Theory (nucl-th) Skewness Transverse momentum Heavy ion |
| Zdroj: | Physical Review C Physical Review C, American Physical Society, 2021, ⟨10.1103/PhysRevC.103.024910⟩ Physical Review C, 2021, ⟨10.1103/PhysRevC.103.024910⟩ |
| ISSN: | 2469-9993 2469-9985 |
| DOI: | 10.1103/physrevc.103.024910 |
| Popis: | We propose the skewness of mean transverse momentum, $\langle p_t \rangle$, fluctuations as a fine probe of hydrodynamic behavior in relativistic nuclear collisions. We describe how the skewness of the $\langle p_t \rangle$ distribution can be analyzed experimentally, and we use hydrodynamic simulations to predict its value. We predict in particular that $\langle p_t \rangle$ fluctuations have positive skew, which is significantly larger than if particles were emitted independently. We elucidate the origin of this result by deriving generic formulas relating the fluctuations of $\langle p_t \rangle$ to the fluctuations of the early-time thermodynamic quantities. We postulate that the large positive skewness of $\langle p_t \rangle$ fluctuations is a generic prediction of hydrodynamic models. 13 pages; 4 figures; v2: corrections in Sec IIIA and appendix A; v3: published version; improved baseline for stat. fluctuations in Fig 3; Expanded discussion in Sec. V |
| Databáze: | OpenAIRE |
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