Branching fractions for Y(3S) -> pi^0 h_b and psi(2S) -> pi^0 h_c

Journal article

Using e^+e^- collision data corresponding to 5.88M Y(3S) [25.9M psi(2S)] decays and acquired by the CLEO III [CLEO-c] detectors operating at CESR, we study the single-pion transitions from Y(3S) [psi(2S)] to the respective spin-singlet states h_{b[c]}. Utilizing only the momentum of suitably selected transition-pi^0 candidates, we obtain the upper limit B(Y(3S) -> pi^0 h_b) < 1.2\times 10^{-3} at 90% confidence level, and measure B(psi(2S) -> pi^0 h_c) = (9.0+-1.5+-1.3)\times 10^{-4}. Signal sensitivities are enhanced by excluding very asymmetric pi^0 -> gamma gamma candidates.

Authors: Collaboration, CLEO; Ge, J; Miller, D; Shipsey, I; Xin, B

• Publication status: Published
• Journal: Phys.Rev.D
• Volume: 84
• Issue: 3
• Pages: 032008
• Publication date: 2011-06-17
• DOI: 10.1103/PhysRevD.84.032008
• EISSN: 1550-2368
• ISSN: 1550-7998
• Language: English
• Keywords: hep-ex