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arXiv · 0707.1633

Search for Prompt Production of $χ_{c}$ and X(3872) in e^+e^- Annihilations

The BABAR Collaboration·B. Aubert
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Abstract

We have searched for prompt production of $χ_{c1}$, $χ_{c2}$ and X(3872) in continuum e^+e^- annihilations using a 386 fb^{-1} data sample collected around $\sqrt{s} = 10.6$ GeV with the BABAR detector using the $γJ/ψ$ decay mode. After accounting for the feed-down from $ψ(2S)\toγχ_{c1,2}$, no significant signal for prompt $χ_{c1,2}$ production is observed. We present improved upper limits on the cross-section, with the rest of the event consisting of more than two charged tracks, to be 77 fb for $χ_{c1}$ and 79 fb for $χ_{c2}$ with $e^+e^-$ center-of-mass frame $χ_c$ momentum greater than 2.0 GeV at 90% confidence level. These limits are consistent with NRQCD predictions. We also set an upper limit on the prompt production of X(3872) through the decay $X(3872)\to γJ/ψ$.

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The BABAR Collaboration, B. Aubert. 2007-07-11. Search for Prompt Production of $χ_{c}$ and X(3872) in e^+e^- Annihilations. https://doi.org/10.1103/physrevd.76.071102

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