English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We have searched for prompt production of $\chi_{c1}$, $\chi_{c2}$ andX(3872) in continuum e^+e^- annihilations using a 386 fb^{-1} data samplecollected 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 77fb 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 limitsare consistent with NRQCD predictions. We also set an upper limit on the promptproduction of X(3872) through the decay $X(3872)\to \gamma J/\psi$.

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