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Observation of Υ(4S) Decays to π+π-Υ(1S) and π+π-Υ(2S)
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BABAR Collaboration (Including:
). (2006) Observation of Υ(4S) Decays to π+π-Υ(1S) and π+π-Υ(2S). Physical Review Letters, Vol.96 (No.23). Article: 232001. doi:10.1103/PhysRevLett.96.232001 ISSN 0031-9007.Research output not available from this repository.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.96.232001
Abstract
We present the first measurement of Υ(4S) decays to π+π-Υ(1S) and π+π-Υ(2S) based on a sample of 230×106Υ(4S) mesons collected with the BABAR detector. We measure the product branching fractions B(Υ(4S)→π+π-Υ(1S))×B(Υ(1S)→μ+μ-)=(2.23±0.25stat±0.27syst)×10-6 and B(Υ(4S)→π+π-Υ(2S))×B(Υ(2S)→μ+μ-)=(1.69±0.26stat±0.20syst)×10-6, from which we derive the partial widths Γ(Υ(4S)→π+π-Υ(1S))=(1.8±0.4) keV and Γ(Υ(4S)→π+π-Υ(2S))=(2.7±0.8) keV.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Physical Review Letters | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 0031-9007 | ||||
| Official Date: | 16 June 2006 | ||||
| Dates: |
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| Volume: | Vol.96 | ||||
| Number: | No.23 | ||||
| Number of Pages: | 7 | ||||
| Page Range: | Article: 232001 | ||||
| DOI: | 10.1103/PhysRevLett.96.232001 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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