Production of strange particles in charged jets and underlying event in p--Pb and Pb--Pb collisions with ALICE

20 May 2014, 15:20
titanium (darmstadtium)



Schlossgraben 1 64283 Darmstadt Germany
Contributed Talk Jets Jets


Xiaoming Zhang (Lawrence Berkeley National Lab. (US))


Properties of the hot and dense strongly interacting matter created in ultra-relativistic heavy-ion collisions can be studied using jets. Hadronization processes occurring in jets are expected to be modified by the interaction of partons with the medium. At intermediate $p_{\rm T}$, a strong increase of the baryon/meson ratio is observed for inclusive light particles produced in heavy-ion collisions when compared to the ratio measured in proton-proton collisions. Production by fragmentation cannot explain this phenomenon and other hadronization mechanisms, like coalescence or parton recombination, have been proposed instead. Measurements of spectra of identified particles produced in jets in heavy-ion collisions will provide further important insights into the interplay of hadronization processes which participate in the jet fragmentation in a medium dominated by the strong interaction under high temperatures and high energy densities. In this talk, we present the first measurements of the $p_{\rm T}$ spectra of $\Lambda$ and $\overline{\Lambda}$ baryons and $\rm{K_s^0}$ mesons produced in association with charged jets in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV and p-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV measured by ALICE at the LHC, exploiting the excellent particle identification capabilities of this experiment. Baryon/meson ratios of the spectra of strange particles associated with jets are studied as a function of centrality and are compared to the ratios obtained for inclusive particles and for particles coming from the underlying event
On behalf of collaboration: ALICE

Primary author

Xiaoming Zhang (Lawrence Berkeley National Lab. (US))

Presentation Materials