Speaker
Description
The Pixel Vertex Detector (PXD) is the innermost detector of the Belle
II experiment. Information from the PXD, together with data from
other detectors, allows to have a very precise vertex reconstruction.
The effect of beam background on reconstruction is studied by adding
measured or simulated background hit patterns to hits produced by
simulated signal particles. This requires a huge sample of statistically
independent PXD background noise hit patterns to avoid systematic
biases, resulting in a huge amount of storage due to the high granular-
ity of the PXD sensors. As an efficient way of producing background
noise, we explore the idea of an on-demand PXD background genera-
tor realised using Generative Adversarial Networks (GANs). In order
to evaluate the quality of generated background we measure physical
quantities which are sensitive to the background in the PXD.
