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Evidence for the eta(b)(1S) meson in radiative Y(2S) decay
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BABAR Collaboration (Including:
). (2009) Evidence for the eta(b)(1S) meson in radiative Y(2S) decay. Physical Review Letters, Vol.103 (No.16). article no. 161801 . doi:10.1103/PhysRevLett.103.161801 ISSN 0031-9007.Research output not available from this repository.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.103.161801
Abstract
We have performed a search for the eta(b)(1S) meson in the radiative decay of the Y(2S) resonance using a sample of 91.6 x 10(6) Y(2S) events recorded with the BABAR detector at the PEP-II B factory at the SLAC National Accelerator Laboratory. We observe a peak in the photon energy spectrum at E-gamma = 609.3(-4.5)(+4.6)(stat) +/- 1.9(syst) MeV, corresponding to an eta(b)(1S) mass of 9394.2(-4.9)(+4.8)(stat) +/- 2.0(syst) MeV/c(2). The branching fraction for the decay Y(2S) --> gamma eta(b)(1S) is determined to be 3.9 +/- 1.1(stat)(-0.9)(+1.1)(syst)] x 10(-4). We find the ratio of branching fractions B[Y(2S) --> gamma eta(b)(1S)]/B[Y(3S) --> gamma eta(b)(1S)] = 0.82 +/- 0.24(stat)(-0.19)(+0.20)(syst).
Item Type: | Journal Article | ||||
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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 October 2009 | ||||
Dates: |
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Volume: | Vol.103 | ||||
Number: | No.16 | ||||
Number of Pages: | 7 | ||||
Page Range: | article no. 161801 | ||||
DOI: | 10.1103/PhysRevLett.103.161801 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Funder: | DOE, NSF (USA), NSERC (Canada), CEA, CNRS-IN2P3 (France), BMBF, DFG (Germany), INFN (Italy), FOM (The Netherlands), NFR (Norway), MES (Russia), MEC (Spain), STFC (United Kingdom), Marie Curie EIF (European Union), A. P. Sloan Foundation. |
Data sourced from Thomson Reuters' Web of Knowledge
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