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

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

2011-06-17

arxiv.org/abs/1106.3558v2

Phys.Rev.D84:032008,2011

Physics

High Energy Physics

High Energy Physics - Experiment

12 pages 4 figures, version published in Physical Review D

Scientific paper

10.1103/PhysRevD.84.032008

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.

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