Measurements of branching fractions and direct ${\it CP}$-violating asymmetries in $B^+ \to K^+ π^0~\mbox{and}~π^+ π^0$ decays using 2019 and 2020 Belle II data
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- Abstract
- We report measurements of branching fractions ($\mathcal B$) and direct ${\it CP}$-violating asymmetries ($\mathcal A_{\it CP}$) for the decays $B^+\to K^+\pi^0$ and $B^+ \to \pi^+\pi^0$ reconstructed with the Belle II detector in a sample of asymmetric-energy electron-positron collisions at the $\Upsilon(4S)$ resonance corresponding to 62.8 $\text{fb}^{-1}$ of integrated luminosity. The results are $\mathcal{B}(B^+ \to K^+\pi^0) = [11.9 ^{+1.1}_{-1.0} (\rm stat)\pm 1.6(\rm syst)]\times 10^{-6}$, $\mathcal{B}(B^+ \to \pi^+\pi^0) = [5.5 ^{+1.0}_{-0.9} (\rm stat)\pm 0.7(\rm syst)]\times 10^{-6}$, $\mathcal A_{\it CP}(B^+ \to K^+\pi^0) = -0.09 \pm 0.09 (\rm stat)\pm 0.03(\rm syst)$, and $\mathcal A_{\it CP}(B^+ \to \pi^+\pi^0) = -0.04 \pm 0.17 (\rm stat)\pm 0.06(\rm syst)$. The results are consistent with previous measurements and show a detector performance comparable with early Belle performance.
- Autoren
- 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
- H Atmacan
- 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
- M Bertemes
- E Bertholet
- M Bessner
- S Bettarini
- V Bhardwaj
- B Bhuyan
- F Bianchi
- T Bilka
- S Bilokin
- D Biswas
- A Bobrov
- A Bondar
- G Bonvicini
- A Bozek
- M Bračko
- P Branchini
- N Braun
- RA Briere
- TE Browder
- DN Brown
- A Budano
- L Burmistrov
- S Bussino
- M Campajola
- L Cao
- G Caria
- G Casarosa
- C Cecchi
- D Červenkov
- M-C Chang
- P Chang
- R Cheaib
- V Chekelian
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- YQ Chen
- Y-T Chen
- BG Cheon
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- I Domínguez Jiménez
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- Autoren-URL
- http://arxiv.org/abs/2105.04111v1
- Schlüsselwörter
- hep-ex
- hep-ex
- hep-ph
- Notes
- 23 pages, 10 figures. Supporting material for Winter 2021 conferences
- Datum der Veröffentlichung
- 2021
- Datum der Datenerfassung
- 2021
- Datum, an dem der Datensatz öffentlich gemacht wurde
- 2021
- Titel
- Measurements of branching fractions and direct ${\it CP}$-violating asymmetries in $B^+ \to K^+ π^0~\mbox{and}~π^+ π^0$ decays using 2019 and 2020 Belle II data
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2105.04111v1.pdf
Datenquelle: arXiv
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