Observation of the Bottomonium Ground State in the Decay Y(3S) to ynb Metadata

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  • Main Title Observation of the Bottomonium Ground State in the Decay Y(3S) to ynb


  • Author: Aubert, B.
    Creator Type: Personal


  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization


  • Name: Stanford Linear Accelerator Center
    Place of Publication: [Menlo Park, California]
    Additional Info: SLAC


  • Creation: 2008-07-11


  • English


  • Content Description: The authors report the results of a search for the bottomonium ground state {eta}{sub b}(1S) in the photon energy spectrum with a sample of (109 {+-} 1) million of {Upsilon}(3S) recorded at the {Upsilon}(3S) recorded at the {Upsilon}(3S) energy with the BABAR detector at the PEP-II B factory at SLAC. They observe a peak in the photon energy spectrum at E{sub {gamma}} = 921.2{sub -2.8}{sup +2.1}(stat) {+-} 2.4(syst) MeV with a significance of 10 standard deviations. They interpret the observed peak as being due to monochromatic photons from the radiative transition {Upsilon}(3S) {yields} {gamma} {eta}{sub b}(1S). This photon energy corresponds to an {eta}{sub b}(1S) mass of 9388.9{sub -2.3}{sup +3.1}(stat) {+-} 2.7(syst) MeV/c{sup 2}. The hyperfine {Upsilon}(1S)-{eta}{sub b}(1S) mass splitting is 71.4{sub -3.1}{sup +2.3}(stat) {+-} 2.7(syst) MeV/c{sup 2}. The branching fraction for this radiative {Upsilon}(3S) decay is estimated to be (4.8 {+-} 0.5(stat) {+-} 1.2(syst)) x 10{sup -4}.
  • Physical Description: 8 pages


  • Keyword: Decay
  • Keyword: Photons
  • Keyword: Stanford Linear Accelerator Center Experiment-Hep,Hepex
  • STI Subject Categories: 43 Particle Accelerators
  • Keyword: Ground States
  • Keyword: Bottomonium
  • Keyword: Experiment-Hep,Hepex


  • Journal Name: Physical Review Letters


  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI


  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article


  • Text


  • Report No.: SLAC-PUB-13288
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 934741
  • Archival Resource Key: ark:/67531/metadc895669


  • Display Note: http://www.slac.stanford.edu/cgi-wrap/pubpage?slac-pub-13288.html