Dresden 2013 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 16: Schwerionenkollisionen und QCD Phasen

HK 16.2: Talk

Monday, March 4, 2013, 17:15–17:30, HSZ-201

Jet fragmentation into strange hadrons in Pb-Pb collisions with ALICE at the LHC — •Alice Zimmermann — Physikalisches Institut, Universitaet Heidelberg, Germany

The ALICE experiment at the LHC aims at studying ultra-relativistic heavy-ion collisions, where quarks and gluons are expected to be deconfined and to form the so-called Quark-Gluon Plasma. The measurement of particle jets, stemming from hard-scattering of partons in the colliding nuclei, allows to study parton energy-loss in the medium and correspondingly to constrain theoretical models. Production in jets of strange particles, like K_s⁰, Λ and Λ particles, gives insight into fragmentation mechanisms and baryon-to-meson ratio in jets. These particles are reconstructed via their V0-decay topology.

In this talk, first results on K_s⁰ and Λ production in jets are presented for Pb-Pb collisions at (s_NN)^1/ = 2.76 TeV. Based on their V0-decay topology, these particles can be reconstructed within jets at mid-rapidity, over a wide range of transverse momentum (from p_T(V0)= 0.2 to 10 GeV/c).