First Look at the Time-Dependent CP Violation Using Early Belle II Data

Chekelian, Vladimir

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First Look at the Time-Dependent CP Violation Using Early Belle II Data

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Chekelian, Vladimir
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

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https://publications.mppmu.mpg.de/2020/MPP-2020-9/FullText.v03.pdf
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Citation

Chekelian, V. (2020). First Look at the Time-Dependent CP Violation Using Early Belle II Data. In The 19th Lomonosov Conference on Elementary Particle Physics, the Moscow State University, Moscow, Russia, 22-28 August, 2019. Singapore: World Scientific.

Cite as: https://hdl.handle.net/21.11116/0000-0008-1B95-2

Abstract

The Belle~II experiment at the SuperKEKB energy-asymmetric $e^+ e^-$ collider started the first physics run in March 2019 at a center of mass energy corresponding to the mass of the $\Upsilon(4S)$. A first look at the time-dependent $CP$ violation is presented, utilising an early data set comprising 2.6 fb$^{-1}$ of total luminosity. A new concept of time-dependent fits based on a weighting technique applied to an {\it assistive} MC sample of events is presented as well.