Dresden 2013 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

HK: Fachverband Physik der Hadronen und Kerne

HK 52: Poster - Instrumentation I

HK 52.22: Poster

Mittwoch, 6. März 2013, 16:45–19:00, HSZ 2.OG

Data-driven calibration procedure for the HADES electromagnetic calorimeter — •Dimitar Mihaylov — Excellence Cluster “Universe”, Boltzmannstr. 2, 85748, Garching, Germany

The High Acceptance Di-Electron Spectrometer (HADES) is dedicated to study the dense nuclear matter. Currently the HADES detector system is not capable to detect photons. In order to improve the situation an electromagnetic calorimeter (EMC) has been proposed. It will enable the identification of the neutral pseudoscalar mesons (π⁰, η) via their decay into two photons. The reconstruction of those particles is achieved by analyzing the invariant mass spectrum (IMS) of the detected photons.

The existing photon reconstruction procedure delivers systematical errors to the momenta of the photons which lead to inaccuracies in the IMS. A calibration procedure capable of improving the IMS of the photons was developed and will be presented. This procedure has been implemented in a standalone C++ program. The calibration procedure is based on an algorithm that allows to correct the momenta of the individual photons by using the π⁰ mass as a reference. The accuracy of procedure has been tested on simulated data.