PoS - Proceedings of Science
Volume 397 - The Ninth Annual Conference on Large Hadron Collider Physics (LHCP2021) - Poster Session
Correlation between initial spatial anisotropy and final momentum anisotropies in relativistic heavy ion collisions
S. Thakur*, S.K. Saha, P. Dasgupta, R. Chatterjee and S. Chattopadhyay
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Pre-published on: October 20, 2021
Published on: November 17, 2021
The anisotropic flow ($v_n$) in relaitvistic heavy ion collisions arises due to the initial spatial anisotropy ($\varepsilon_n$) of the overlapping zone between the two colliding nuclei. The linear correlation between $\varepsilon_{n}$ and $v_{n}$ for small n is a quantitative measure of the efficiency of conversion of the initial spatial anisotropy to the final momentum anisotropy. We study the collision centrality, transverse momentum ($p_{T}$) and collision energy dependence of this correlation for charged particles using a hydrodynamical model framework. The $p_{T}$ dependent correlation coefficient is found to be strongly dependent on the mass as well as $p_{T}$ of the emitted particles. We also study $p_{T}$ dependent relative fluctuation in anisotropic flow and show that it is sensitive to the value of $\eta/s$ specially in low $p_{T}$ region. In addition, we study the sensitivity of the correlation coefficient to the fluctuation size parameter.
DOI: https://doi.org/10.22323/1.397.0204
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