Kristin Fanebust Hetland
Bergen University College
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Journal of Physics: Conference Series | 2011
K. Aamodt; L. Bravina; Øystein Djuvsland; O. Dordic; Hege Austrheim Erdal; G. Eyyubova; D. Fehlker; Øystein Senneset Haaland; H. Helstrup; Kristin Fanebust Hetland; M. Huang; K. Kanaki; B. Kileng; Dag Toppe Larsen; Jan R Lien; S. Lindal; L. Liu; Per-Ivar Lønne; Gunnar Løvhøiden; Jovan Milosevic; M. S. Nilsson; J. Nystrand; G. Øvrebekk; T. Pocheptsov; Henrik Qvigstad; M. Richter; D. Röhrich; Toralf Bernhard Skaali; A. Szostak; Trine Spedstad Tveter
Measurements of π0 and η inclusive spectra provide reference data for upcoming heavy ion runs, as well as a check on the applicability of perturbative QCD calculations at LHC energies. The high-resolution central tracking system of ALICE can be used to reconstruct π0 and η through photon conversions, as an alternative to direct measurement in the ALICE Calorimeters. Knowledge of the ALICE material budget is crucial for the extraction of the absolute yield from the conversion technique. The statistics availible from this technique are comparable to that of the photon spectrometer (PHOS), and the reconstruction method can also be applied for Pb-Pb collisions. Moreover, the implementation of a photon conversion trigger in the High Level Trigger (HLT) framework gives the possibility of identifying π0 and η candidates online, and increasing the statistics at higher momentum. The status of the π0 meson reconstruction from photon conversions from p-p collisions at = 900 GeV and = 7 TeV is presented in this article.
