Measurement of 𝐵⁺ → 𝜏⁺𝜈𝜏 branching fraction with a hadronic tagging method at Belle II
Files
(Published version)
Date
2025
Authors
Adachi, I.
Adamczyk, K.
Ahmed, H.
Ahn, Y.
Aihara, H.
Akopov, N.
Alhakami, M.
Aloisio, A.
Althubiti, N.
Angelsmark, M.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Physical Review D, 2025; 112(7):072002-1-072002-17
Statement of Responsibility
Belle II Collaboration
Conference Name
Abstract
We present a measurement of the branching fraction of 𝐵+ →𝜏+𝜈𝜏 decays using 387±6×106 ϒ(4𝑆) collected between 2019 and 2022 with the Belle II detector at the SuperKEKB 𝑒+𝑒− collider. We reconstruct the accompanying 𝐵− meson using the hadronic tagging method, while 𝐵+ →𝜏+𝜈𝜏 candidates are identified in the recoil. We find evidence for 𝐵+ →𝜏+𝜈𝜏 decays at 3.0 standard deviations, including systematic uncertainties. The measured branching fraction is ℬ(𝐵+→𝜏+𝜈𝜏)=[1.24±0.41(stat)±0.19(syst)]× 10−4.
School/Discipline
Dissertation Note
Provenance
Description
Published 3 October 2025
Access Status
Rights
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
License
Grant ID
http://purl.org/au-research/grants/arc/DP200101792
http://purl.org/au-research/grants/arc/DP210101900
http://purl.org/au-research/grants/arc/DP210102831
http://purl.org/au-research/grants/arc/DE220100462
http://purl.org/au-research/grants/arc/LE210100098
http://purl.org/au-research/grants/arc/LE230100085
http://purl.org/au-research/grants/arc/DP210101900
http://purl.org/au-research/grants/arc/DP210102831
http://purl.org/au-research/grants/arc/DE220100462
http://purl.org/au-research/grants/arc/LE210100098
http://purl.org/au-research/grants/arc/LE230100085