Speaker
Description
Hadronic resonances have been shown to be good probes to investigate the late-stage evolution of ultra-relativistic heavy-ion collisions. Their lifetimes are comparable with the time scale of the fireball generated in these collisions. Therefore they are sensitive to the competing re-scattering and regeneration effects occurring in the hadronic phase, which modify particle momentum distributions and yields after hadronization.
Recent measurements of resonance production in high-multiplicity proton-proton (pp) and proton-lead (p-Pb) collisions have shown the onset of phenomena typical of heavy-ion (Pb-Pb) collisions even in those smaller collision systems. In particular, there are hints of suppression of the $\rm K^{*}(892)^{\rm 0}$/$\rm K$ ratio with increasing charged-particle multiplicity. A study of $\rm K^{*}(892)^{\rm \pm}$ production can provide further evidence to confirm the observed trend.
In this poster the measurement of $\rm K^{*\rm \pm}$ production at mid-rapidity in pp collisions at 13 TeV as a function of the charged-particle multiplicity will be presented and discussed. The measurements will be compared to results for the $\rm K^{*\rm 0}$, other collision systems and energies, and to theoretical models.
