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Rediscovery of $B^0\to J\mskip 1mu / \psi\mskip 2mu K^0_{\scriptscriptstyle L}$ at Belle II

MPS-Authors

Andricek,  L.
Max Planck Semiconductor Laboratory, Max Planck Society;

Ninkovic,  J.
Max Planck Semiconductor Laboratory, Max Planck Society;

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2106.13547.zip
(Preprint), 341KB

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Citation

Belle II Collaboration, Abudinén, F., Adachi, I., Adak, R., Adamczyk, K., Ahlburg, P., et al. (in preparation). Rediscovery of $B^0\to J\mskip 1mu / \psi\mskip 2mu K^0_{\scriptscriptstyle L}$ at Belle II.


Cite as: https://hdl.handle.net/21.11116/0000-000F-B045-C
Abstract
We present preliminary results on the reconstruction of the $B^0\to J\mskip
1mu / \psi\mskip 2mu K^0_{\scriptscriptstyle L}$ decay, where $J\mskip 1mu /
\psi\mskip 2mu\to\mu^+\mu^-$ or $e^+e^-$. Using a dataset corresponding to a
luminosity of $62.8\pm0.6\mbox{fb}^{-1}$ collected by the Belle II experiment
at the SuperKEKB asymmetric energy $e^+e^-$ collider, we measure a total of
$267\pm21$ candidates with $J\mskip 1mu / \psi\mskip 2mu\to\mu^+\mu^-$ and
$226\pm20$ with with $J\mskip 1mu / \psi\mskip 2mu\to e^+e^-$. The quoted
errors are statistical only.