Measurement of the branching fraction ${\cal B}(\bar B^0\to D^{*+}\ell^-\barν_\ell)$ with early Belle II data
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- Zeitschriftenaufsatz
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- Abstract
- We measure the branching fractions for the decays $\bar{B}^0 \to D^{*+} e^{-} \bar{\nu}_e$ and $\bar{B}^0 \to D^{*+} \mu^{-} \bar{\nu}_\mu$ using $8.70 \pm 0.09~{\rm fb}^{-1}$ of data collected by the Belle II experiment at the SuperKEKB asymmetric-energy $e^+ e^-$ collider. Candidate signal decays are reconstructed with the subsequent decays $D^{*+}\to D^0 \pi^+$ and $D^0\to K^-\pi^+$. We obtain the results ${\cal B}(\bar{B}^0 \to D^{*+} e^{-} \bar{\nu}_e)$ = $(4.55\pm0.14(\mathrm{stat})\pm0.35 (\mathrm{syst})) \%$ and ${\cal B}(\bar{B}^0 \to D^{*+} \mu^{-} \bar{\nu}_\mu)$ = $(4.84\pm 0.13(\mathrm{stat})\pm0.37(\mathrm{syst})) \%$, in agreement with the world averages. The measurements serve to validate the full chain of detector operation and calibration, data collection and processing, and production of physics results in the case of semileptonic $B$-meson decays.
- 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
- 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
- W Bartel
- G Batignani
- J Baudot
- A Beaulieu
- J Becker
- PK Behera
- M Bender
- JV Bennett
- E Bernieri
- FU Bernlochner
- M Bertemes
- 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
- YQ Chen
- Y-T Chen
- BG Cheon
- K Chilikin
- H-E Cho
- K Cho
- S-J Cho
- S-K Choi
- S Choudhury
- D Cinabro
- L Corona
- LM Cremaldi
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- S Cunliffe
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- F Dattola
- E De La Cruz-Burelo
- G De Nardo
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- J Dingfelder
- Z Doležal
- I Domínguez Jiménez
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- D Dossett
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- TD Kimmel
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- JS Lange
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- C Marinas
- A Martini
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- K Miyabayashi
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- GB Mohanty
- H Moon
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- JA Mora Grimaldo
- A Morda
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- H-G Moser
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- F Mueller
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- Th Muller
- G Muroyama
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- K Nakagiri
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- T Nanut
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- D Neverov
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- R Rasheed
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- I Ripp-Baudot
- M Ritter
- M Ritzert
- G Rizzo
- LB Rizzuto
- SH Robertson
- D Rodríguez Pérez
- JM Roney
- C Rosenfeld
- A Rostomyan
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- S Rummel
- G Russo
- D Sahoo
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- B Schwenker
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- A Selce
- K Senyo
- IS Seong
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- C Sfienti
- V Shebalin
- CP Shen
- H Shibuya
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- A Sibidanov
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- Y Ushiroda
- Y Usov
- SE Vahsen
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- A Vinokurova
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- B Wang
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- V Zhilich
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- A Zupanc
- Autoren-URL
- http://arxiv.org/abs/2004.09066v3
- Schlüsselwörter
- hep-ex
- hep-ex
- Notes
- 17 pages, 2 figures, minor correction added
- Datum der Veröffentlichung
- 2020
- Datum der Datenerfassung
- 2020
- Datum, an dem der Datensatz öffentlich gemacht wurde
- 2020
- Titel
- Measurement of the branching fraction ${\cal B}(\bar B^0\to D^{*+}\ell^-\barν_\ell)$ with early Belle II data
Files
2004.09066v3.pdf
Datenquelle: arXiv
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