Longitudinal Flow Decorrelations in Xe + Xe Collisions at √s<sub>NN</sub> = 5.44 TeV with the ATLAS Detector
The first measurement of longitudinal decorrelations of harmonic flow amplitudes v<sub>n</sub> for n = 2-4 in Xe + Xe collisions at √s<sub>NN</sub> = 5.44 TeV is obtained using 3 μb⁻¹ of data with the ATLAS detector at the LHC. The decorrelation signal for v₃ and v₄ is foun...
| Autores: | , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | Argentina |
| Institución: | Universidad Nacional de La Plata |
| Repositorio: | SEDICI (UNLP) |
| Idioma: | inglés |
| OAI Identifier: | oai:sedici.unlp.edu.ar:10915/142274 |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/142274 |
| Access Level: | acceso abierto |
| Palabra clave: | Ciencias Exactas Física Collective flow Particle correlations & fluctuations Quark-gluon plasma Relativistic heavy-ion collisions |
| Sumario: | The first measurement of longitudinal decorrelations of harmonic flow amplitudes v<sub>n</sub> for n = 2-4 in Xe + Xe collisions at √s<sub>NN</sub> = 5.44 TeV is obtained using 3 μb⁻¹ of data with the ATLAS detector at the LHC. The decorrelation signal for v₃ and v₄ is found to be nearly independent of collision centrality and transverse momentum (p<sub>T</sub>) requirements on final-state particles, but for v₂ a strong centrality and p<sub>T</sub> dependence is seen. When compared with the results from Pb + Pb collisions at √s<sub>NN</sub> = 5.02 TeV, the longitudinal decorrelation signal in midcentral Xe + Xe collisions is found to be larger for v₂, but smaller for v₃. Current hydrodynamic models reproduce the ratios of the v<sub>n</sub> measured in Xe + Xe collisions to those in Pb + Pb collisions but fail to describe the magnitudes and trends of the ratios of longitudinal flow decorrelations between Xe + Xe and Pb + Pb. The results on the system-size dependence provide new insights and an important lever arm to separate effects of the longitudinal structure of the initial state from other early and late time effects in heavy-ion collisions. |
|---|