Speaker
Alice Zimmermann
(Ruprecht-Karls-Universitaet Heidelberg (DE))
Description
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, measurements of strange hadrons in jets may clarify the role of fragmentation processes in the anomalous baryon to meson ratio at intermediate particle $p_\mathrm{T}$, that firstly was observed in A-A collisions at RHIC and later confirmed in lead-lead (Pb--Pb) collisions at the LHC. Furthermore also measurements in proton-lead (p--Pb) collisions at the LHC showed this anomaly, but to a lesser extent.
In this contribution, measurements are presented of the $p_\mathrm{T}$ spectra of $\Lambda$($\overline{\Lambda}$) baryons and $K^0_{S}$ mesons produced in association with charged jets in Pb--Pb collisions at $\sqrt{s_\mathrm{NN}}=2.76$ TeV and p--Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV. The analysis is based on data recorded by ALICE at the LHC, exploiting its excellent particle identification capabilities. The baryon/meson ratios of strange particles associated with jets are studied as a function of the event activity in p-Pb collisions and are restricted to central events in Pb-Pb collisions. A comparison is shown to the ratios obtained for inclusive particle production and for particles stemming from the underlying event as well as to PYTHIA proton-proton (pp) simulations.
| On behalf of collaboration: | ALICE |
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Author
Alice Zimmermann
(Ruprecht-Karls-Universitaet Heidelberg (DE))
