000001340 001__ 1340
000001340 005__ 20190321073459.0
000001340 037__ $$aBELLE2-MTHESIS-2019-002
000001340 041__ $$aeng
000001340 100__ $$aNadia Toutounji
000001340 245__ $$aReconstruction Methods for Semi-leptonic Decays of B-mesons with the Belle II Experiment
000001340 260__ $$aSydney$$bThe University of Sydney$$c2019
000001340 300__ $$a118
000001340 500__ $$aPresented on 21 01 2019
000001340 502__ $$aMSc$$bSydney, The University of Sydney$$c2019
000001340 520__ $$aThe Belle II detector located in Tsukuba, Japan, building on the work of its  predecessor Belle, is scheduled for long-term data collection from electron-positron $e^{+} e^{-}$ collisions commencing in early 2019, for the purpose of  studying rare B-meson decays in the search for new physics beyond the Standard  Model. The Belle II Analysis Software Framework (BASF2) has been developed for  physics analyses, with the Full Event Interpretation (FEI) being one such method  designed for the reconstruction of  B-meson decays from detector information.  The FEI must be trained on simulated Monte Carlo (MC) data and introduces a  signal-specific training process that can be tailored for a particular decay of  interest in an attempt to increase the performance over signal-independent  training processes such as those employed in Full Reconstruction (FR) methods at Belle. This study investigates the performance of the signal-specific and  signal-independent FEI algorithms in the context of rare semi-leptonic B-meson decays, in comparison to leptonic decays, with the respective modes $B^{+} \to \rho^{0} \mu^{+} \nu_{\mu}$ and $B^{+} \to \tau^{+} \nu_{\tau}$ chosen as working examples. The relative performance of the FEI methods implemented is  evaluated via a number of key performance indicators including the  reconstruction efficiency and purity of the reconstructed $\Upsilon(4S)$ event.
000001340 700__ $$aKevin Varvell$$edir.
000001340 8560_ $$fkevin.varvell@desy.de
000001340 8564_ $$uhttps://docs.belle2.org/record/1340/files/Nadia%20Toutounji.pdf$$yMPhil thesis
000001340 980__ $$aTHESIS