2018年12月3日
Observation of I (2S) →γηb (1S) Decay
Physical Review Letters
- 巻
- 121
- 号
- 23
- 開始ページ
- 232001-1
- 終了ページ
- 232001-8
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevLett.121.232001
© 2018 authors. Published by the American Physical Society. We report the observation of I(2S)→γηb(1S) decay based on an analysis of the inclusive photon spectrum of 24.7 fb-1 of e+e- collisions at the I(2S) center-of-mass energy collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure a branching fraction of B[I(2S)→γηb(1S)]=(6.1-0.7-0.6+0.6+0.9)×10-4 and derive an ηb(1S) mass of 9394.8-3.1-2.7+2.7+4.5 MeV/c2, where the uncertainties are statistical and systematic, respectively. The significance of our measurement is greater than 7 standard deviations, constituting the first observation of this decay mode.
- リンク情報
-
- DOI
- https://doi.org/10.1103/PhysRevLett.121.232001
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/30576207
- Scopus
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85058089146&origin=inward 本文へのリンクあり
- Scopus Citedby
- https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85058089146&origin=inward
- URL
- https://link.aps.org/doi/10.1103/PhysRevLett.121.232001
- ID情報
-
- DOI : 10.1103/PhysRevLett.121.232001
- ISSN : 0031-9007
- eISSN : 1079-7114
- PubMed ID : 30576207
- SCOPUS ID : 85058089146