Measurement of inclusive muon elliptic flow in pp collision at √s=13 TeV with the ALICE Experiment

Heavy-flavour hadrons are produced in hard-scattering processes in hadron collisions before the Quark–Gluon Plasma (QGP) formation. They successively interact with the QGP via inelastic and elastic processes. The elliptic flow v2 is one of the signatures of QGP formation. The ALICE experiment has measured its value in various heavy flavour decay channels in Pb–Pb and p–Pb collisions. Indications of non-zero v2 in pp collisions have been shown by different experiments. Within this work, the inclusive muon elliptic flow (v^μ_2 ) in the forward rapidity has been measured using ALICE RUN 2 pp at √s = 13 TeV collision data. The elliptic flow has been measured in the 0-5%, 0-10%, 0-15% and 0-20% multiplicity bins using the two-particle correlation method. Intermediate and high transverse momentum (pμT) muons mainly originates from heavy-flavour decays. A non-zero vμ2 has been observed in all the studied multiplicity classes up to a muon pμT = 3 GeV/c with a significance above 5σ. The 3 < pμT < 4 has shown an above 5σ non-zero vμ2 in the 0-5% multiplicity class, while an above 3σ non-zero flow in the other multiplicity classes.