Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 48: Heavy Ion Collision and QCD Phases X
HK 48.4: Vortrag
Donnerstag, 17. März 2016, 15:00–15:15, S1/01 A01
Measurement of jet fragmentation into charged particles in p-Pb collisions at √sNN = 5.02 TeV with ALICE — •Dennis Weiser for the ALICE collaboration — Physikalisches Institut, Heidelberg, Deutschland
The measurement of jet energy loss or jet properties in ultrarelativistic Pb-Pb collisions allows to access the properties of the Quark-Gluon Plasma. Specifically, measurements of jet fragmentation are sensitive to possible modifications of the parton radiation pattern and thus give insights into the energy loss mechanisms in the hot and dense medium.
The measurement of jet fragmentation in p-Pb collisions provides an important reference to the measurement in Pb-Pb collisions. To assign possible modifications observed in Pb-Pb collisions to in-medium effects a measurement in a reference system is needed in that the medium is not created, but where possible initial-state- or cold-nuclear-matter effects are present.
We present the measurement of the longitudinal momentum distribution of charged particles with transverse momentum pT > 0.15 GeV/c in charged jets in p-Pb collisions at √sNN = 5.02 TeV. Charged jets are reconstructed with the anti-kT algorithm with a radius parameter of R=0.4. The underlying event is subtracted event-by-event as well as on the event ensemble level. The observed distributions are compared to a reference based on pp collisions.