Strange Hadron Production as a Function of Multiplicity and Transverse Spherocity in proton-proton Collisions at $\sqrt{s}=13$~TeV

Abstract: This thesis presents the study of the K$^{0}_{s}$, $\Lambda$, and $\bar{\Lambda}$ production in pp collisions at $\sqrt{s}=13$~TeV recorded by the ALICE experiment at the LHC. The K$^{0}_{s}$, $\Lambda$, and $\bar{\Lambda}$ particles are reconstructed in the transverse momentum ($p_{\mathrm{T}}$) range of $1.0-12.0$~GeV/$c$ by using their \VNoll topology. The $p_{\mathrm{T}}$-spectra are studied as a function of the charged-particle multiplicity and the transverse spherocity. The identified particle productions are studied for events including all multiplicity classes (V0M:0-100\%) and for high multiplicity events (V0M.0-10\%). Further, the event shape analysis using the transverse spherocity includes two selections of the high multiplicity events, low spherocity events ($S_{O}<0.47$) and high spherocity events ($S_{O}>0.76$). The baryon-to-meson ratio ($\Lambda+\bar{\Lambda}$)/2K$^{0}_{s}$ as a function of the transverse momentum is studied for the four event selections. The results exhibit an enhanced production of K$^{0}_{s}$, $\Lambda$, and $\bar{\Lambda}$ particles and an enhanced baryon-to-meson ratio in the intermediate transverse momentum region for the high spherocity events ($S_{O}>0.76$) compared to the other three event selections.