Difference: FJPPLFlavourPhysics (9 vs. 10)
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| > > | Time dependent asymmetry measurements (TDCPV) play a major role in flavor physics. They give access to CP violating parameters, which are central elements to test the Standard Model through the CKM matrix and which exhibit high sensitivity to New Physics. Our project ultimately intends to exploit the high sensitivity of TDCPV measurements to reveal indirectly New Physics in rare transitions b→sγ and b→sqq (q=s,d), which proceed through penguin diagrams. Conducting such advanced analysis at a B-factory requires two key ingredients: tagging the flavour of one of the B meson while the other decays into a flavour eigenstate and estimating with high precision the time difference (∆t) between the two B decay vertices. The Belle II experiment intends to stand at the forefront of flavour physics in the coming years by accumulating an integrated luminosity of 50 ab-1 at the SuperKEKB e+e- collider. However, in the first years of Belle II operation, the integrated luminosity growth follows the pace of the collider progresses toward high instantaneous luminosity and our understanding of the detector performances improves as well with time. The present project gathers physicists from Japan and France in order to reach robust time dependent asymmetry measurements with Belle II data in a timely manner. Members of this project have a strong leading role in Belle and Belle II collaborations regarding these measurements. Our activities have started since 2019 with relatively simple measurements like B meson lifetime measurement and rediscovery of the main B decay into CP-eigenstate (J/Psi+Ks). The project continues with refining analysis tools (flavour tag, time resolution model) and with the reconstruction of rare final states (Ks Ks Ks as well as Ks pi+ pi- gamma). | |||||||
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French members: J. Baudot, G. Dujany, I. Ripp-Baudot, T. Fillinger, R. Rasheed | ||||||||
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