A Pattern Recognition for the Straw Tube subdetector in PANDA

G. Boca1 11Fair Joint Core Team and GSI, Darmstadt, Germany and Dipartimento di Fisica Nucleare e Teorica dell’Universitá, via Bassi 6, 27100 Pavia, Italy In the experiment PANDA, at FAIR, GSI, the central detector and the inner silicon pixel and strip detector[1] will play an essential role in tracking charge particles, produced in the target. An antiproton beam of maximum 15 GeV/c momentum will impinge on a pointlike pellet target. The silicon tracker is positioned just around the interaction region, at few mm from the beam axis up to about 16 cm of distance from it. The central detector will cover the region from about 16 cm up to about 42 cm of distance from the beam axis (which runs in the Z direction) and it will be approxiamtely 1 meter long along Z. While the silicon detector provides the most precise measurement of the track parameters, the central tracker helps disentangling the confusion and assigning all the hits found to the right track candidates. At the moment in PANDA there are two options for the central tracker, the first is a set of Straws Tubes (ST), the second is a Time Projection Chamber. This report will concentrate on the performance of the Pattern Recognition code written for the ST option. The ST system consists in approximately 4500 straws, 1 cm diameter, 1 m long. The majority of the straws axex are parallel to