Heidelberg 2015 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 15: Heavy Ion Collisions and QCD Phases 2

HK 15.2: Vortrag

Montag, 23. März 2015, 17:30–17:45, T/HS1

Production of strange particles in charged jets in Pb–Pb collisions measured with ALICE at the LHC — •Alice Zimmermann for the ALICE collaboration — Physikalisches Institut Universität Heidelberg

Studies of jet production can provide information about the properties of the hot and dense strongly interacting matter created in ultra-relativistic heavy-ion collisions. Specifically, measurement of strange particles in jets may clarify the role of fragmentation processes in the anomalous baryon to meson ratio at intermediate particle p_T that has been observed in Pb–Pb collisions.

In this contribution, measurements of the p_T spectra of Λ baryons and K_S⁰ mesons produced in association with charged jets in Pb–Pb collisions at √s_NN=2.76 TeV are presented. The analysis is based on data which was recorded by ALICE at the LHC, exploiting its excellent particle identification capabilities. The baryon/meson ratios of the spectra of strange particles associated with jets are measured in central events in Pb-Pb. A comparison to the ratios obtained for inclusive particles and for particles stemming from the underlying event is shown.