Observation of Double cc bar Production in e+ e- Annihilation at sqrt{s} ~ 10.6 GeV
| dc.creator | The Belle Collaboration | |
| dc.creator | Abe, K. | |
| dc.date | 2002-05-31 | |
| dc.date.accessioned | 2026-07-07T12:01:46Z | |
| dc.date.available | 2026-07-07T12:01:46Z | |
| dc.description | We report the observation of prompt J/psi via double ccbar production from the e+e- continuum. In this process one ccbar pair fragments into a J/psi meson while the remaining pair either produces a bound charmonium state or fragments into open charm. Both cases have been observed: the first by studying the mass spectrum of the system recoiling against the J/psi, and the second by reconstructing the J/psi together with a charmed meson. We find cross-sections of σ(e+ e- -> J/psi eta_c (gamma)) * BR (eta_c -> >=4 charged) = 0.033 (+0.007 -0.006)(stat) \pm 0.009(syst)pb and σ(e+ e- -> J/psi D*+ X) = 0.53 (+0.19 -0.15)(stat) \pm 0.14(syst) pb, and infer σ(e+ e- -> J/psi c cbar) / σ(e+ e- -> J/psi X) = 0.59 (+0.15 -0.13)(stat) \pm 0.12(syst). These results are obtained from a 46.2/fb data sample collected near the Upsilon(4S) resonance, with the Belle detector at the KEKB asymmetric energy e+ e- collider. | |
| dc.description | 7 pages, 2 figures, to be submitted to Physical Review Letters | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0205104 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0205104 | |
| dc.identifier | Phys.Rev.Lett.89:142001,2002 | |
| dc.identifier | doi:10.1103/PhysRevLett.89.142001 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/207209 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Observation of Double cc bar Production in e+ e- Annihilation at sqrt{s} ~ 10.6 GeV | |
| dc.type | text |