Heidelberg 2015 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 75: Heavy Ion Collisions and QCD Phases 12

HK 75.2: Talk

Friday, March 27, 2015, 15:00–15:15, T/SR25

Transverse Momentum Spectra of Inclusive Charged Particles in pp, p–Pb and Pb–Pb Collisions with ALICE — •Philipp Lüttig for the ALICE collaboration — Institut für Kernphysik, Goethe-Universität Frankfurt

To study the properties of matter created in p–Pb and Pb–Pb collisions, a common observable is the nuclear modification factor (R_AA) as function of the transverse momentum (p_T). The ALICE detector at the CERN-LHC has accumulated a wealth of data in pp, p–Pb and Pb–Pb collisions in the past years. Using a combined tracking approach based on information in the Inner Tracking System (ITS) and the Time Projection Chamber (TPC) ALICE is capable to measure the transverse momentum in a broad range.
Transverse momentum spectra of charged particles in minimum-bias pp, p–Pb and Pb–Pb (LHC-Run-2010) collisions have been measured up to p_T = 50 GeV/c.
For pp and p–Pb collisions, a feasibility study to extend the p_T range of the charged particle spectra using data triggered by the ALICE Electromagnetic Calorimeter or the ALICE Transition Radiation Detector is presented in this talk. For Pb–Pb collisions, the extension of these spectra for p_T > 50 GeV/c by including LHC-Run-2011 data is discussed. Furthermore, we present a study of R_AA measured in Pb–Pb collisions as a function of p_T and angle with respect to the reaction plane. Supported by BMBF and the Helmholtz Association.