Measurements of branching fractions and CP-violating charge asymmetries in charmless $B$ decays reconstructed in 2019--2020 Belle~II data
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- Zeitschriftenaufsatz
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- Abstract
- We report on first measurements of branching fractions~($\mathcal{B}$) and CP-violating charge asymmetries~($\mathcal{A}$) in charmless $B$ decays at Belle~II. We use a sample of electron-positron collisions collected in 2019 and 2020 at the $\Upsilon(4S)$ resonance and corresponding to $34.6$\,fb$^{-1}$ of integrated luminosity. We use simulation to determine optimized event selections. The $\Delta E$ distributions of the resulting samples, restricted in $M_{\rm bc}$, are fit to determine signal yields. Signal yields are corrected for efficiencies determined from simulation and control data samples to obtain branching fractions and CP-violating asymmetries for flavour-specific channels. These are the first measurements in charmless decays reported by Belle~II. Results are compatible with known determinations and show detector performance comparable with the best Belle results offering a reliable basis to assess projections for future reach.
- Autoren
- Belle II Collaboration
- F Abudinén
- I Adachi
- R Adak
- K Adamczyk
- P Ahlburg
- JK Ahn
- H Aihara
- N Akopov
- A Aloisio
- F Ameli
- L Andricek
- N Anh Ky
- DM Asner
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- V Aulchenko
- T Aushev
- V Aushev
- T Aziz
- V Babu
- S Bacher
- S Baehr
- S Bahinipati
- AM Bakich
- P Bambade
- Sw Banerjee
- S Bansal
- M Barrett
- G Batignani
- J Baudot
- A Beaulieu
- J Becker
- PK Behera
- M Bender
- JV Bennett
- E Bernieri
- FU Bernlochner
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- D Červenkov
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- LB Rizzuto
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- D Rodríguez Pérez
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- C Rosenfeld
- A Rostomyan
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- M Rozanska
- G Russo
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- DA Sanders
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- L Santelj
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- J Serrano
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- C Sfienti
- V Shebalin
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- H Shibuya
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- A Sibidanov
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- I Ueda
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- K Unger
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- P Urquijo
- Y Ushiroda
- Y Usov
- SE Vahsen
- R van Tonder
- GS Varner
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- A Vinokurova
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- V Vorobyev
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- M-Z Wang
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- A Warburton
- M Watanabe
- S Watanuki
- I Watson
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- S Wehle
- M Welsch
- C Wessel
- J Wiechczynski
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- H Windel
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- LJ Wu
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- B Yabsley
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- W Yan
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- I Yeo
- JH Yin
- M Yonenaga
- YM Yook
- T Yoshinobu
- CZ Yuan
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- JZ Zhang
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- V Zhilich
- QD Zhou
- XY Zhou
- VI Zhukova
- V Zhulanov
- A Zupanc
- Autoren-URL
- http://arxiv.org/abs/2009.09452v1
- Schlüsselwörter
- hep-ex
- hep-ex
- hep-ph
- Notes
- 33 pages, 22 figures. Supporting material for Summer 2020 conferences
- Datum der Veröffentlichung
- 2020
- Datum der Datenerfassung
- 2020
- Datum, an dem der Datensatz öffentlich gemacht wurde
- 2020
- Titel
- Measurements of branching fractions and CP-violating charge asymmetries in charmless $B$ decays reconstructed in 2019--2020 Belle~II data
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2009.09452v1.pdf
Datenquelle: arXiv
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