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

Abstract

Using a sample of 1.06 \times 10^8 ψ^{\prime} decays collected by the BESIII detector, χ_{c0} and χ_{c2} decays into π^0π^0 and ηηare studied. The branching fraction results are Br(χ_{c0}\toπ^0π^0)=(3.23\pm 0.03\pm0.23 \pm 0.14)\times 10^{-3}, Br(χ_{c2}\toπ^0π^0)=(8.8\pm 0.2\pm 0.6\pm0.4)\times 10^{-4}, Br(χ_{c0}\toηη)=(3.44\pm 0.10\pm0.24 \pm0.2)\times 10^{-3}, and Br(χ_{c2}\toηη)=(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 ψ^{\prime}\toγχ_{cJ}, respectively. The results provide information on the decay mechanism of χ_c states into pseudoscalars.

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

References in corpus (5)

• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• A coherent study of ${\chi }_{c0,2}\to VV$, $PP$ and $SS$
• New Measurement of Exclusive Decays of the chi_c0 and chi_c2 to Two-Meson Final States

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