Observation of the Exclusive Reaction e+e- -> phi eta at sqrt{s}=10.58 GeV

Details Observation of the Exclusive Reaction e+e- -> phi eta at sqrt{s}=10.58 GeV Observation of the Exclusive Reaction e+e- -> phi eta at sqrt{s}=10.58 GeV

2006-11-15

arxiv.org/abs/hep-ex/0611028v1

Phys.Rev.D74:111103,2006

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 4 postscript figues, submitted to PRD-RC

Scientific paper

10.1103/PhysRevD.74.111103

We report the observation of $\e^+e^-\to \phi\eta$ near $\sqrt{s}$ = 10.58 GeV with 6.5 $\sigma$ significance in the $K^+K^-\gamma\gamma$ final state in a data sample of 224 $fb^{-1}$ collected by the BaBar experiment at the PEP-II $e^+e^-$ storage rings. We measure the restricted radiation-corrected cross section to be $\sigma(\e^+e^- \to \phi \eta) =$$2.1\pm 0.4 (\mathrm{stat})\pm 0.1(\mathrm{syst}) \mathrm{fb}$ within the range $|\cos\theta^*| < 0.8$, where $\theta^*$ is the center-of-mass polar angle of the $\phi$ meson. The $\phi$ meson is required to be in the invariant mass range of 1.008 $< m_{\phi} <$ 1.035 \gevcc. The radiation-corrected cross section in the full $\cos\theta^*$ range is extrapolated to be $2.9\pm 0.5 (\mathrm{stat})\pm 0.1(\mathrm{syst}) \mathrm{fb}$.

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