Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 3: Schwerionenkollisionen und QCD Phasen
HK 3.3: Vortrag
Montag, 4. März 2013, 11:45–12:00, HSZ-201
Background subtraction techniques for heavy-flavour electrons with ALICE at the LHC — •Christian Alberto Schmidt — TU Darmstadt - Institut für Kernphysik, Darmstadt, Germany
ALICE is the dedicated heavy-ion experiment at the LHC at CERN. The
LHC delivers proton and heavy-ion beams with center-of-mass-energies of currently up
to √s = 8 TeV for protons and √sNN = 2.76 TeV for heavy ions.
The heavy-flavour (charm and beauty) production serves as an important test of perturbative Quantum Chromodynamics (pQCD) calculations. It is investigated via the measurement of semi-electronic decays of heavy-flavour hadrons. In heavy-ion collisions, the modifications of the heavy-flavour electron momentum distributions compared to the one in pp collisions presents a sensitive probe for the properties of the hot dense matter created in such interactions.
This measurement will only have success, if the background of the electron pT-spectra is understood, estimated and subtracted. In this talk we present results of the cocktail subtraction method and the statistical photonic electron subtraction method. Both analysis require a good understanding of the non heavy-flavour electron background. We will show results obtained from reconstructed pp collisions at √s = 7 TeV.