New CLEO II Results on Charm Hadron Decays
| dc.creator | Gan, K. K. | |
| dc.date | 2002-02-04 | |
| dc.date.accessioned | 2026-07-07T03:34:59Z | |
| dc.date.available | 2026-07-07T03:34:59Z | |
| dc.description | We present new results on charm hadron decays from the CLEO II experiment. The D*+ width is measured for the first time, Gamma(D*+) = 96 +- 4 +- 22 keV. The semileptonic decay branching fractions are determined to be B(D+ --> Kbar*0 e+ nu_e) = (6.7 +- 0.4 +- 0.5 +- 0.4)% and B(D+ --> Kbar*0 mu+ nu_mu) = (6.5 +- 0.9 +- 0.5 +- 0.4)%. We observe evidence for Omega_c --> Omega- e+ nu_e and measure the product of the branching fraction and cross section, B(Omega_c --> Omega- e+ nu_e) x sigma(e+e- --> Omega_cX) = 42.2 +- 14.1 +- 11.9 fb. Within the framework of Heavy Quark Effective Theory, we measure in the decay Lambda+_c --> Lambda e+ nu_e the form factor ratio, R = f_2/f_1 = -0.31 +- 0.06 +- 0.06. This provides strong evidence that the form factor f_2 describing spin interactionof the s quark is non-zero. The Xi+_c lifetime is measured to be 503 +- 47 +- 18 fs. The results on branching fractions, cross section, and form factor ratio are preliminary. | |
| dc.description | International Europhysics Conference on HEP, Budapest, 2001 | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0202012 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0202012 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/37194 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | New CLEO II Results on Charm Hadron Decays | |
| dc.type | text |