Evidence for the η b ( 1 S ) Meson in Radiative Υ ( 2 S ) Decay
We have performed a search for the η b ( 1 S ) meson in the radiative decay of the Υ ( 2 S ) resonance using a sample of 91.6 × 10 6 Υ ( 2 S ) 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...
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Veröffentlicht in: | Physical review letters 2009-10, Vol.103 (16), Article 161801 |
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Sprache: | eng |
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