Speaker
Description
In heavy-ion collisions a strong magnetic field is created ($\sim$ 10$^{15}$ T), which together with the presence of a non-zero electric and axial charge density, leads to vector and axial currents called the Chiral Magnetic Effect (CME) and Chiral Separation Effect (CSE), respectively. Their coupling gives rise to a collective excitation in the quark-gluon plasma (QGP) called the Chiral Magnetic Wave (CMW), causing a charge-dependent elliptic flow. As a result, the normalized difference of v$_{2}$ of positive and negative charges, ($\Delta$ v$_{2_{Norm}}$), exhibits a positive slope as a function of charge asymmetry A$_{ch}$. However, non-CMW mechanisms like Local Charge Conservation (LCC) can also describe the $\Delta$ v$_{2}$ dependence on A$_{ch}$ and can be probed by a similar kind of measurement with v$_{3}$ as we expect it not to be affected by the CMW.\
In this talk, we present ALICE measurement of v$_{2}$, $\Delta$ v$_{2_{Norm}}$, v$_{3}$ and $\Delta$ v$_{3_{Norm}}$ of charged hadrons as function of the charge asymmetry (A$_{ch}$) in Pb-Pb collisions at $\sqrt{s_{NN}} =$ 5.02 TeV. The slope parameters from v$_{2}$ and v$_{3}$ are compared to estimate the background contribution in CMW phenomena at LHC energies.
