Impact of elliptic flow on higher order flow coefficients in heavy-ion collisions at the LHC

by Suraj Prasad (IIT Indore, India)

Friday 8 Aug 2025, 14:00 → 15:00 Europe/Budapest

Tanácsterem (III. ép.)

Anisotropic flow coefficients ($v_{n}$) and their fluctuations are sensitive observables that are affected by the transport properties of the systems formed in heavy-ion collisions. The sensitivity of $v_{n}$ increases with an increase in the value of $n$. However, $v_n$ with $n\geq 4$ have nonlinear contributions from elliptic flow ($v_2$) and triangular flow ($v_3$), which dilutes the system response to these coefficients. In this presentation, using the event shape observable, transverse spherocity, events with smaller and larger values of $v_2$ can be selected, which is used to reduce the contribution of $v_2$ from higher order coefficients. It is observed that the higher-order flow coefficients show enhanced damping effects with a change in collision centrality for the events with smaller values of elliptic flow. Transverse spherocity dependence of elliptic flow fluctuations is also explored, which shows that the fluctuations are higher for the events with larger values of transverse spherocity. 

References:
[1] S. Prasad, A. Menon K. R., R. Sahoo, N. Mallick, Phys.Lett.B 868 (2025) 139753.
[2] S. Prasad, N. Mallick, S. Tripathy, R. Sahoo, Phys.Rev.D 107 (2023), 074011.