Dortmund 2021 – scientific programme
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T: Fachverband Teilchenphysik
T 56: Flavour physics III
T 56.4: Talk
Wednesday, March 17, 2021, 16:45–17:00, Tf
Measurement of the photon energy spectrum in the fully-inclusive hadronic-tagged B→ Xs γ decays at the Belle II experiment — •Henrikas Svidras — DESY, Notkestraße 85, 22607 Hamburg, Germany
Belle II is an experiment at the next-generation B factory SuperKEKB located at KEK in Tsukuba, Japan. It aims to probe heavy flavour physics at a higher precision than its predecessors, namely BaBar and Belle. The goal is to collect 50 ab−1 of data during its run: more than 50 times that of Belle. One of the particularly promising decay channels to study is the inclusive radiative B→ Xsγ decay, where Xs denotes any possible decay products containing an s quark and γ is a high-energetic photon. This decay can provide constraints for beyond-SM theories, for example by measuring CP asymmetries, and be used to extract important parameters such as the b quark mass. The analysis presented in this talk focuses on the hadronic-tagged fully-inclusive approach, where one of the daughter B mesons of the Υ(4S) → B B decays into hadrons. The extraction of the photon energy spectrum of the B→ Xs γ is one of the goals of the analysis. The talk presents an overview of the aspects and challenges of this measurement at Belle II.