Measurement of $J/\psi$ production in continuum $e^{+}e^{-}$ annihilations near $\sqrt{s}=10.6-GeV

Measurement of $J/\psi$ production in continuum $e^{+}e^{-}$ annihilations near $\sqrt{s}=10.6-GeV

The production of $J/\psi$ mesons in continuum $e^+e^-$ annihilations has been studied with the BABAR detector at energies near the $\Upsilon(4S)$ resonance, approximately 10.6 GeV. The mesons are distinguished from $J/\psi$ production in B decays through their center-of-mass momentum and energy. We...

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Veröffentlicht in:Physical review letters 2001, Vol.87, p.162002-1-162002-7
Hauptverfasser: Aubert, B., Boutigny, D., Gaillard, J.M., Hicheur, A., Karyotakis, Y., Lees, J.P., Robbe, P., Tisserand, V., Palano, A., Chen, G P., Chen, J C., Qi, N D., Rong, G., Wang, P., Zhu, y S., Eigen, G., Reinertsen, P L., Stugu, B., Abbott, B., Abrams, G S., Borgland, a W., Breon, a B., Brown, D N., Button-Shafer, J., Cahn, R N., Clark, a R., Fan, Q., Gill, M S., Gowdy, S J., Gritsan, A., Groysman, Y., Jacobsen, R G., Kadel, R W., Kadyk, J., Kerth, L T., Kluth, S., Kolomensky Yu, G., Kral, J F., Clerc, C., Levi, M E., Liu, T., Lynch, G., Mir, L M., Momayezi, M., Oddone, P J., Perazzo, A., Pripstein, M., Roe, N A., Romosan, A., Ronan, M T., Shelkov, V G., Telnov, a V., Wenzel, W A., Bright-Thomas, P G., Harrison, T J., Hawkes, C M., Kirk, A., Knowles, D J., Penny, R C., Watson, N K., Deppermann, T., Koch, H., Krug, J., Kunze, M., Peters, K., Schmucker, H., Steinke, M., Andress, J C., Barlow, N R., Bhimji, W., Clark, P J., Cottingham, W N., de Groot, N., Dyce, N., Foster, B., Mass, A., Mcfall, J., Wallom, D., Wilson, F F., Abe, K., Hearty, C., Mattison, T S., Mckenna, J A., Camanzi, B., Jolly, S., Mckemey, a K., Tinslay, J., Blinov, V E., Bukin, a D., Bukin, D A., Dubrovin, M S., Golubev, V B., Ivanchenko, V N., Korol, A, Kravchenko, E A., Onuchin, A., Salnikov, a A., Serednyakov, S I., Skovpen Yu, I., Yushkov, a N.
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Sprache:eng
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High Energy Physics - Experiment
Physics
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Zusammenfassung:The production of $J/\psi$ mesons in continuum $e^+e^-$ annihilations has been studied with the BABAR detector at energies near the $\Upsilon(4S)$ resonance, approximately 10.6 GeV. The mesons are distinguished from $J/\psi$ production in B decays through their center-of-mass momentum and energy. We measure the cross section $e^+e^-\to J/\psi X$ to be $2.52\pm 0.21\pm 0.21$ pb; for momentum above 2 GeV/c, it is $1.87\pm 0.10\pm 0.15$ pb. We set a 90% confidence level upper limit on the branching fraction for direct $\Upsilon(4S)$\to J/\psi X$ decays at $4.3\times 10^{-4}$.
ISSN:0031-9007
1079-7114