Home > Books, Theses & Reports > Theses > Improved Selective Background Monte Carlo Simulation at Belle II with Graph Attention Networks and Weighted Events |
Thesis | BELLE2-MTHESIS-2022-017 |
Boyang Yu ; Thomas Kuhr ; Nikolai Hartmann
2021
LMU Munich
Munich, Germany
Abstract: When measuring rare processes such as B → K(∗)νν¯ or B → lνγ, a huge luminosity is required, which means a large number of simulations are necessary to determine signal efficiencies and background contributions. However, this process demands high computation costs while most of the simulated data, in particular in case of background, are discarded by the event selection. Thus filters using neural networks are introduced after the Monte Carlo event generation to speed up the following processes of detector simulation and reconstruction. Merely filtering out events will however inevitably introduce bias. Therefore statistical methods are invested to deal with this side effect.
Note: Presented on 14 09 2021
Note: MSc
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