Correlation between initial spatial anisotropy and final momentum anisotropies in relativistic heavy ion collisions
| Autor: | Sumit Kumar Saha, Pingal Dasgupta, Subhasis Chattopadhyay, Rupa Chatterjee, Sanchari Thakur |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Correlation coefficient Nuclear Theory media_common.quotation_subject FOS: Physical sciences Charged particle Nuclear physics Momentum Correlation Nuclear Theory (nucl-th) High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Particle Heavy ion Eccentricity (behavior) Anisotropy Nuclear Experiment media_common |
| Popis: | The particle momentum anisotropy ($v_n$) produced in relativistic nuclear collisions is considered to be a response of the initial geometry or the spatial anisotropy $\epsilon_n$ of the system formed in these collisions. The linear correlation between $\epsilon_n$ and $v_n$ quantifies the efficiency at which the initial spatial eccentricity is converted to final momentum anisotropy in heavy ion collisions. We study the transverse momentum, collision centrality, and beam energy dependence of this correlation for different charged particles using a hydrodynamical model framework. The ($\epsilon_n -v_n$) correlation is found to be stronger for central collisions and also for n=2 compared to that for n=3 as expected. However, the transverse momentum ($p_T$) dependent correlation coefficient shows interesting features which strongly depends on the mass as well as $p_T$ of the emitted particle. The correlation strength is found to be larger for lighter particles in the lower $p_T$ region. We see that the relative fluctuation in anisotropic flow depends strongly in the value of $\eta/s$ specially in the region $p_T Comment: 10 pages, 15 figures |
| Databáze: | OpenAIRE |
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