Observation of a near-threshold enhancement in the e+e- -->Lambda_c+Lambda_c- cross section using initial-state radiation
| dc.creator | Pakhlova, G. | |
| dc.date | 2008-07-28 | |
| dc.date | 2008-10-28 | |
| dc.date.accessioned | 2026-07-07T11:45:09Z | |
| dc.date.available | 2026-07-07T11:45:09Z | |
| dc.description | We report a measurement of the exclusive e+e- -->Lambda_c+ Lambda_c- cross section as a function of center-of-mass energy near the Lambda_c+ Lambda_c- threshold. A clear peak with a significance of 8.2 sigma is observed in the Lambda_c+ Lambda_c- invariant mass distribution just above threshold. With an assumption of a resonance origin for the observed peak, a mass and width of M=(4634^{+8}_{-7}(stat.)^{+5}_{-8}(sys.))Mev/c2 and Gamma_tot=(92^{+40}_{-24}(stat.)}^{+10}_{-21}(sys.))MeV are determined. The analysis is based on a study of events with initial-state-radiation photons in a data sample collected with the Belle detector at the Υ(4S) resonance and nearby continuum with an integrated luminosity of 695/fb at the KEKB asymmetric-energy e+e- collider. | |
| dc.description | 6 pages, 4 figures, published in PRL, presented at ICHEP2008 | |
| dc.identifier | https://arxiv.org/abs/0807.4458 | |
| dc.identifier | http://arxiv.org/abs/0807.4458 | |
| dc.identifier | Phys.Rev.Lett.101:172001,2008 | |
| dc.identifier | doi:10.1103/PhysRevLett.101.172001 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/201790 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Observation of a near-threshold enhancement in the e+e- -->Lambda_c+Lambda_c- cross section using initial-state radiation | |
| dc.type | text |