000003991 001__ 3991
000003991 005__ 20231221121329.0
000003991 037__ $$aBELLE2-UTHESIS-2023-002
000003991 041__ $$aeng
000003991 100__ $$aUrbschat, Bela
000003991 245__ $$aSuppression of Continuum Background with Neural Networks for Belle II
000003991 260__ $$aMunich$$bMax Planck Institute for Physics$$c2023
000003991 300__ $$amult. p
000003991 500__ $$aPresented on 12 12 2023
000003991 502__ $$aBSc$$bMunich, Technical University of Munich$$c2023
000003991 520__ $$aAt Belle II, a so called B factory, pairs of B mesons are produced in large numbers to study their subsequent decays. B physics offers many opportunities for precision tests of the standard model, where processes involving loop diagrams are especially interesting as they may be influenced by new particles entering the loops. A group of decays of interest here are the B → Kπ decays, where the tree-level amplitudes are suppressed, thus making them sensitive to loop contributions. Measurements of branching ratios and CP asymmetries of those decays are expected to satisfy certain relations predicted by the standard model, which may however be violated if new physics is involved. This allows for so called null tests of the standard model. Some of the necessary measurements are however very difficult as the decays are rare and backgrounds are high. In this situation thus the best possible background suppression is desirable. Motivated by this, here a novel approach for qq background suppression using low level variables and deep neural networks will be explored for the B0 → K0 π 0 decay.
000003991 700__ $$aCaldwell, Allen$$edir.
000003991 700__ $$aMoser, Hans-Günther$$edir.
000003991 8560_ $$furbschat@mpp.mpg.de
000003991 8564_ $$uhttps://docs.belle2.org/record/3991/files/BELLE2-UTHESIS-2023-002.pdf$$ythesis$$zThe "presented on" field unfortunately does not appear to be editable by the user. At least the correct date is in the pdf now.
000003991 8564_ $$uhttps://docs.belle2.org/record/3991/files/defense%20slides.pdf$$ydefense slides
000003991 980__ $$aTHESIS