PANDA Website

The PANDA experiment has a great potential to test QCD in the low momentum transfer region with unprecedented accuracy by performing very precise hadron spectroscopy. To achieve this goal the resonance scan method will be used to determine the mass and width of variety of hadronic states. This technique requires a precise knowledge of the luminosity. This thesis develops the conceptual design of the detector allowing to measure the absolute luminosity with about 3% precision. The detector concept is based on the measurement of elastically scattered antiprotons from the interaction region in the Coulomb-nuclear interference region. Due to the finite beam emittance and the finite size of the interaction volume, the track of the antiproton has to be reconstructed in the luminosity monitor, and not just one point. The detector will located between z = +10 m and z= +13 m downstream of the interaction point and will consist of four planes of four sensors each covering the polar angular range of 2.8 < theta < 7.5 mrad. The performance study of this detector is one of the main topics of this thesis. These studies were done using Monte Carlo simulations within the PandaRoot framework and the results were compared with the measured data obtained from the tracking station beam test performed at COSY with proton beams. This work then addressed the question of how the performance of the luminosity monitor effects the determination of the mass and width measurements of X(3872) state using the full PANDA setup. The measurements were performed for three different assumed widths. The influences of the signal to background ratio and the uncertainty on the luminosity were investigated.