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

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

2007-07-11

arxiv.org/abs/0707.1633v1

Phys.Rev.D76:071102,2007

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages 1 figure submitted to Phys. Rev. D (Rapid Communications)

Scientific paper

10.1103/PhysRevD.76.071102

We have searched for prompt production of $\chi_{c1}$, $\chi_{c2}$ 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 $\gamma J/\psi$ decay mode. After accounting for the feed-down from $\psi(2S)\to\gamma\chi_{c1,2}$, no significant signal for prompt $\chi_{c1,2}$ 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 $\chi_{c1}$ and 79 fb for $\chi_{c2}$ with $e^+e^-$ center-of-mass frame $\chi_c$ 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 $X(3872)\to \gamma J/\psi$.

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