2021年3月23日
Evidence for X (3872) →j/ψ π+ π-Produced in Single-Tag Two-Photon Interactions
Physical Review Letters
- 巻
- 126
- 号
- 12
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevLett.126.122001
We report the first evidence for X(3872) production in two-photon interactions by tagging either the electron or the positron in the final state, exploring the highly virtual photon region. The search is performed in e+e-→e+e-J/ψ π+ π-, using 825 fb-1 of data collected by the Belle detector operated at the KEKB e+e-collider. We observe three X(3872) candidates, where the expected background is 0.11±0.10 events, with a significance of 3.2σ. We obtain an estimated value for γB(X(3872)→J/ψ π+ π-) assuming the Q2 dependence predicted by a cc meson model, where-Q2 is the invariant mass squared of the virtual photon. No X(3915)→J/ψ π+ π-candidates are found.
- リンク情報
-
- DOI
- https://doi.org/10.1103/PhysRevLett.126.122001
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/33834793
- Scopus
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85103505018&origin=inward 本文へのリンクあり
- Scopus Citedby
- https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85103505018&origin=inward
- ID情報
-
- DOI : 10.1103/PhysRevLett.126.122001
- ISSN : 0031-9007
- eISSN : 1079-7114
- PubMed ID : 33834793
- SCOPUS ID : 85103505018