Observation of the Hadronic Transitions Chi_{b 1,2}(2P) -> omega Upsilon(1S)

H. Severini

doi:10.1103/PhysRevLett.92.222002

Observation of the Hadronic Transitions Chi_{b 1,2}(2P) -> omega Upsilon(1S)

High Energy Physics - Experiment 2010-04-08 v1

Authors: H. Severini

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Abstract

The CLEO Collaboration has observed the first hadronic transition among bottomonium (b bbar) states other than the dipion transitions among vector states, Upsilon(nS) -> pi pi Upsilon(mS). In our study of Upsilon(3S) decays, we find a significant signal for Upsilon(3S) -> gamma omega Upsilon(1S) that is consistent with radiative decays Upsilon(3S) -> gamma chi_{b 1,2}(2P), followed by chi_{b 1,2} -> omega Upsilon(1S). The branching ratios we obtain are Br(chi_{b1} -> omega Upsilon(1S) = 1.63 (+0.35 -0.31) (+0.16 -0.15) % and Br(chi_{b2} -> omega Upsilon(1S) = 1.10 (+0.32 -0.28) (+0.11 - 0.10)%, in which the first error is statistical and the second is systematic.

Keywords

hadronic transition bottomonium chib states Upsilon decays CLEO experiment branching ratio

Cite

@article{arxiv.hep-ex/0307034,
  title  = {Observation of the Hadronic Transitions Chi_{b 1,2}(2P) -> omega Upsilon(1S)},
  author = {H. Severini},
  journal= {arXiv preprint arXiv:hep-ex/0307034},
  year   = {2010}
}

Comments

submitted to XXI Intern'l Symp on Lepton and Photon Interact'ns at High Energies, August 2003, Fermilab

Observation of the Hadronic Transitions Chi_{b 1,2}(2P) -> omega Upsilon(1S)

Abstract

Keywords

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