000002223 001__ 2223
000002223 005__ 20210214202853.0
000002223 037__ $$aBELLE2-PTHESIS-2021-001
000002223 041__ $$aeng
000002223 100__ $$aReem RASHEED
000002223 245__ $$aSearch for new physics in B0 radiative decays and measure of their lifetime with the Belle II experiment
000002223 260__ $$aStrasbourg$$bIPHC$$c2020
000002223 300__ $$a142
000002223 500__ $$aPresented on 18 12 2020
000002223 502__ $$aPhD$$bStrasbourg, University of Strasbourg$$c2020
000002223 520__ $$aAfter the Big Bang matter and antimatter were present in equal amounts. Today, however, everything we see, is made almost entirely of matter. A fundamental ingredient to explain this asymmetry between matter and antimatter is the violation of the CP (Charge Parity) symmetry. CP violation has been observed but quantitatively not enough to explain the huge asymmetry. The Belle II experiment in Japan studies the particles produced in electron-positron collisions at the SuperKEKB collider, the highest intensity collider in the World, allowing a high precision measurements of the known sources of CP violation and looking for new ones. In my PhD, I worked on measuring the CP violation in B meson radiative decays (decays with photon in final state) particularly promising thanks to their high sensitivity to possible new processes. Following this analysis, I started a new measurement of the B mesons lifetime where I could verify the robustness of the tools used in the CP violation measurement. Keywords : CP violation, lifetime, B meson, SuperKEKB collider, Belle II, asymmetry, collider, Electron-Positron Collisions, highest intensity,
000002223 700__ $$aJerome BAUDOT$$edir.
000002223 8560_ $$fjerome.baudot@desy.de
000002223 8564_ $$uhttps://docs.belle2.org/record/2223/files/BELLE2-PTHESIS-2021-001.pdf
000002223 980__ $$aTHESIS