000000498 001__ 498
000000498 005__ 20170313110212.0
000000498 037__ $$aBELLE2-POSTER-CONF-2017-002
000000498 041__ $$aeng
000000498 100__ $$aMoritz Nadler
000000498 245__ $$aLow momentum track finding in Belle 2 
000000498 260__ $$aCHEP 2012$$c2012-05-21
000000498 300__ $$a1
000000498 500__ $$aDate of Document & Author are uncertain
000000498 520__ $$aThe Silicon Vertex Detector (SVD) of the Belle II experiment is a newly developed device with four measurement layers. The detector is designed to enable track reconstruction down to the lowest momenta possible, in order to significantly increase the effective data sample and the physics potential of the experiment. Both track finding and track fitting have to deal with these requirements. We describe the outline of the track finding procedure and details of the track fit. An immportant aspect of the latter is the correct treatment of material effects such as multiple Coulomb scattering and energy loss by ionization at very low particle energies. As the SVD is an ultra-light design, non-Gaussian tails in the multiple scattering distributions are non-negligible and have to be dealt with. We present results from a Deterministic Annealing Filter (DAF) and compare its performance to the baseline Kalman filter. Both methods are implemented using the GENFIT package. We describe the various modifications and improvements of GENFIT that are required for a successful application in the Belle II environment.
000000498 700__ $$aRudolf Frühwirth
000000498 700__ $$aJakob Lettenbichler
000000498 8560_ $$fkooktae.kim@desy.de
000000498 8564_ $$uhttps://docs.belle2.org/record/498/files/BELLE2-POSTER-CONF-2017-002.pdf