KS0 - and (anti-) Λ -hadron correlations in pp collisions at √s=13 TeV

Abstract

Two-particle Azimuthal correlations are measured with the ALICE apparatus in pp collisions at s√=13s=13 TeV to explore strangeness- and multiplicity-related effects in the fragmentation of jets and the transition regime between bulk and hard production, probed with the condition that a strange meson (KS0KS0) or baryon (ΛΛ) with transverse momentum pT>3pT>3 GeV/cc is produced. Azimuthal correlations between kaons or ΛΛ hyperons with other hadrons are presented at midrapidity for a broad range of the trigger (3<ptriggT<203<pTtrigg<20 GeV/cc) and associated particle pTpT (1 GeV/cc <passocT<ptriggT<pTassoc<pTtrigg), for minimum-bias events and as a function of the event multiplicity. The near- and away-side peak yields are compared for the case of either KS0KS0 or ΛΛ(Λ¯¯¯¯Λ¯) being the trigger particle with that of inclusive hadrons (a sample dominated by pions). In addition, the measurements are compared with predictions from PYTHIA 8 and EPOS LHC event generators.