000002486 001__ 2486
000002486 005__ 20210628123317.0
000002486 037__ $$aBELLE2-PTHESIS-2021-010
000002486 041__ $$afre
000002486 100__ $$aDaniel Cuesta
000002486 245__ $$aEtude du bruit de fond induit par les nano-faisceaux du collisionneur SuperKEKB et préparation de l’analyse de physique de l’expérience Belle II
000002486 260__ $$aStrasbourg$$bIPHC$$c2019
000002486 300__ $$a142
000002486 500__ $$aPresented on 23 09 2019
000002486 502__ $$aPhD$$bStrasbourg, University of Strasbourg$$c2019
000002486 520__ $$aThe Belle II experiment aims to discover new physics processes not described by the standard model of particle physics, based on measurements of unprecedented precision with B and D mesons, and τ leptons. The experiment started recording SuperKEKB collisions in 2018. This e+e- collider targets the highest ever achieved instantaneous luminosity, based on a new nano-beam collision scheme. In this context, this thesis contributed to the preparation of future physics measurements in the Belle II experiment. First, we measured the beam induced background, based on measurements provided by a double- sided pixelated detector, equipped with CMOS sensors. This study is very important in order to achieve the ambitious physics program of Belle II, because this beam induced background may damage the detectors and worsen the reached experimental precision. Then, we studied the reconstruction performance of the K0S meson, which is a key ingredient of the Belle II physics program. Early collision data were used to rediscover the first K0S with the Belle II experiment.
000002486 700__ $$aIsabelle Ripp-Baudot$$edir.
000002486 8560_ $$fisabelle.ripp@iphc.cnrs.fr
000002486 8564_ $$uhttps://docs.belle2.org/record/2486/files/BELLE2-PTHESIS-2021-010.pdf
000002486 980__ $$aTHESIS