Bochum 2018 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 9: Heavy Ion Collisions and QCD Phases II

HK 9.4: Talk

Monday, February 26, 2018, 17:30–17:45, HZO 60

Integration of cosmic muons in the Bethe-Bloch parametrization with the ALICE TPC — •Matthias Kleiner for the ALICE collaboration — Institut für Kernphysik, Goethe-Universität Frankfurt

The Time Projection Chamber (TPC) is the main tracking and particle identification detector of the ALICE experiment at the CERN LHC. The specific energy loss (dE/dx) of particles traversing the TPC is parametrized in the ALICE analysis framework AliROOT by a Bethe-Bloch function. At present, the function is fitted using clean samples of electrons, protons and pions. However, none of these particles have a velocity in the region of the relativistic rise up to the Fermi plateau. In this talk, a new method is presented which includes the cosmic muons dE/dx to the parametrization. The quality of the new parametrization is studied and compared to the parametrization obtained without muons. Supported by BMBF and Helmholtz Association.