First results on $\mathrm{K}^{*}(892)^{\pm}$ resonance production in pp collisions with ALICE at the LHC

Abstract: The study of strange hadronic resonances in pp collisions contributes to the study of strangeness production in small systems. Measurements in pp collisions constitute a reference for the study in larger colliding systems and provide constraints for tuning QCD-inspired event generators. Since the lifetimes of short-lived resonances such as $\mathrm{K}^{*}(892)^{\pm}$ ($\tau \sim 4$ fm/\textit{c}) are comparable with the lifetime of the fireball produced in heavy-ion collisions, regeneration and rescattering effects can modify the measured yield, especially at low transverse momentum. The first results for the $\mathrm{K}^{*}(892)^{\pm}$ resonance obtained in inelastic pp collisions at $\sqrt{\text{s}}=$ 5.02, 8, and 13 TeV will be shown. The $\mathrm{K}^{*}(892)^{\pm}$ has been measured at mid-rapidity via its hadronic decay channel $\mathrm{K}^{*}(892)^{\pm}\rightarrow \mathrm{K}^{0}_{\mathrm{S}}+\pi^{\pm}$, with the ALICE detector. In particular, the transverse momentum ($p_{\mathrm{T}}$) spectrum, integrated yields, $\langle p_{\mathrm{T}}\rangle$ and ratio to stable hadrons will be presented. The $\mathrm{K}^{*}(892)^{\pm}$ results are compared with $\mathrm{K}^{*}(892)^{0}$ measurements and with commonly-used Monte Carlo models. Measurements at 13 TeV are in addition a baseline for comparison with pp measurements at other LHC energies.