Martin Sobotzik successfully completed his doctoral thesis on Angular Analysis of the B → K*ℓℓ Decay in Long Shutdown 1 Data at Belle II.
In his analysis he is looking for signs of physics beyond the standard model in flavour-changing neutral currents (FCNC) where a B meson decays into a kaon and two leptons. Since this decay can only occurr in loop diagrams, it is heavily suppressed.
He therefore investigated the use of neural networks to select these rare events from Belle II data collected until the Long Shutdown 1. Furthermore, using advanced statistical tools, he could improve the background subtraction compared to the traditional approach of extracting the background shape from simulations, thus decreasing systematic effects.
Congratulations!
David Ternes successfully completed his bachelor thesis "Simulation of the cross section of the neutron capture reaction of 204Tl and possible measurement of the inverse electro-disintegration in the MESA accelerator" as well as his final exam and was awarded the title of Bachelor of Science (B.Sc.).
Laura Klöpper successfully completed her bachelor thesis "Aufbau eines Teststands und Charakterisierung von Li-Glas-Neutronendetektoren" as well as her final exam and was awarded the title of Bachelor of Science (B.Sc.).
The next two weeks will be dedicated to taking more data on our precious 208Pb target. Together with the last beam time, this will, hopefully, allow us to extract the