Photo-production of psi' Mesons at HERA
| dc.creator | Adloff, C. | |
| dc.date | 1997-11-19 | |
| dc.date.accessioned | 2026-07-07T11:46:51Z | |
| dc.date.available | 2026-07-07T11:46:51Z | |
| dc.description | Quasi-elastic (z >0.95) photo-production of psi' mesons has been observed at HERA for photon-proton centre-of-mass energies in the range 40 to 160 GeV. The psi' mesons were identified through their decays to l+l- and to J/psi pi+ pi-, where the J/psi subsequently decays to l+l-, the lepton l being either a muon or an electron. The cross-section for quasi-elastic photoproduction was measured to be [18.0 +- 2.8 (stat) +- 3.0(syst)] nb at a photon-proton centre-of-mass energy of 80 GeV. The ratio of the psi' to J/psi quasi-elastic cross-sections is 0.150 +- 0.027 (stat) +- 0.022 (syst). | |
| dc.description | 13 pages, 4 figures, submitted to Phys. Lett. B | |
| dc.identifier | https://arxiv.org/abs/hep-ex/9711012 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/9711012 | |
| dc.identifier | Phys.Lett.B421:385-394,1998 | |
| dc.identifier | doi:10.1016/S0370-2693(97)01529-3 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/202370 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Photo-production of psi' Mesons at HERA | |
| dc.type | text |