Branching fraction measurements of χ_{c0} and χ_{c2} to π^0π^0 and ηη

Details Branching fraction measurements of χ_{c0} and χ_{c2} to π^0π^0 and ηη Branching fraction measurements of χ_{c0} and χ_{c2} to π^0π^0 and ηη

2010-01-29

arxiv.org/abs/1001.5360v2

Phys.Rev.D81:052005,2010

Physics

High Energy Physics

High Energy Physics - Experiment

17 pages, 6 figures, submitted to Phys. Rev. D

Scientific paper

10.1103/PhysRevD.81.052005

Using a sample of 1.06 \times 10^8 \psi^{\prime} decays collected by the BESIII detector, \chi_{c0} and \chi_{c2} decays into \pi^0\pi^0 and \eta\eta are studied. The branching fraction results are Br(\chi_{c0}\to\pi^0\pi^0)=(3.23\pm 0.03\pm0.23 \pm 0.14)\times 10^{-3}, Br(\chi_{c2}\to\pi^0\pi^0)=(8.8\pm 0.2\pm 0.6\pm0.4)\times 10^{-4}, Br(\chi_{c0}\to\eta\eta)=(3.44\pm 0.10\pm0.24 \pm0.2)\times 10^{-3}, and Br(\chi_{c2}\to\eta\eta)=(6.5\pm 0.4\pm 0.5\pm 0.3)\times 10^{-4}, where the uncertainties are statistical, systematic due to this measurement, and systematic due to the branching fractions of \psi^{\prime}\to\gamma\chi_{cJ}, respectively. The results provide information on the decay mechanism of \chi_c states into pseudoscalars.

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