# p-p-K$^{+}$ and p-p-K$^{-}$ femtoscopy in pp collisions at $\sqrt{s}$ = 13 TeV

Description

The figures show the results of the first p-p-K$^{+}$ and p-p-K$^{-}$ femtoscopic correlation study in high-multiplicity pp collisions at $\sqrt{s}$ = 13 TeV. The analysis aims to evaluate the contributions due to the genuine three-body effects in three-body systems with kaons. Genuine three-particle correlations are isolated in both systems employing the Kubo's cumulant expansion method. The latter requires the evaluation of the lower-order correlations, in which at least one particle is uncorrelated. This is done using both the event mixing technique and the newly developed projector method. The p-p-K$^{+}$ and p-p-K$^{-}$ correlation functions as well as the lower-order contributions (p-p)-K$^+$, p-(p-K$^+$), (p-p)-K$^{-}$ and p-(p-K$^{-}$) are measured. The resulting three-particle cumulants, which are linked to the three-body effects, are finally extracted.