Measurements of the observed cross sections for $e^+e^-\to$ exclusive light hadrons containing $π^0π^0$ at $\sqrt s= 3.773$, 3.650 and 3.6648 GeV

Details Measurements of the observed cross sections for $e^+e^-\to$ exclusive light hadrons containing $π^0π^0$ at $\sqrt s= 3.773$, 3.650 and 3.6648 GeV Measurements of the observed cross sections for $e^+e^-\to$ exclusive light hadrons containing $π^0π^0$ at $\sqrt s= 3.773$, 3.650 and 3.6648 GeV

2008-10-31

arxiv.org/abs/0810.5611v1

Phys.Lett.B670:184-189,2008

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 2 figures

Scientific paper

10.1016/j.physletb.2008.10.051

By analyzing the data sets of 17.3, 6.5 and 1.0 pb$^{-1}$ taken, respectively, at $\sqrt s= 3.773$, 3.650 and 3.6648 GeV with the BES-II detector at the BEPC collider, we measure the observed cross sections for $e^+e^-\to \pi^+\pi^-\pi^0\pi^0$, $K^+K^-\pi^0\pi^0$, $2(\pi^+\pi^-\pi^0)$, $K^+K^-\pi^+\pi^-\pi^0\pi^0$ and $3(\pi^+\pi^-)\pi^0\pi^0$ at the three energy points. Based on these cross sections we set the upper limits on the observed cross sections and the branching fractions for $\psi(3770)$ decay into these final states at 90% C.L..

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