First observation of Xi(c)+ ---> Xi0 e+ electron-neutrino and a measurement of the Xi(c)+ / Xi(c)0 lifetime ratio
Collaboration
10 pages
Published in:
- Phys.Rev.Lett. 74 (1995) 3113-3117,
- Phys.Rev.Lett. 75 (1995) 4155 (erratum)
DOI:
PDG: 2
Report number:
- CLNS-94-1288,
- CLEO-94-14
Experiments:
View in:
Citations per year
Abstract: (APS)
Using the CLEO II detector at the Cornell Electron Storage Ring we have observed the decay modes Ξc+→Ξ0e+νe and Ξc0→Ξ−e+νe by the detection of a Ξ-positron pair of appropriate invariant mass. We find B(Ξc+→Ξ0e+νe)σ(e+e−→Ξc+X)=1.55±0.33±0.25 pb, B(Ξc0→Ξ−e+νe)σ(e+e−→Ξc0X)=0.63±0.12±0.10 pb, B(Ξc+→Ξ−π+π+)/B(Ξc+→Ξ0e+νe)=0.44±0.11−0.06+0.11, and B(Ξc0→Ξ−π+)/B(Ξc0→Ξ−e+νe)=0.32±0.10−0.03+0.05. Assuming the Ξc+ and Ξc0 are equally produced in e+e− annihilation events at 10 GeV, the lifetime ratio of Ξc+/Ξc0 is measured to be 2.46±0.70−0.23+0.33.- electron positron: colliding beams
- colliding beams: electron positron
- electron positron: annihilation
- annihilation: electron positron
- Xi/c+: electroproduction
- electroproduction: Xi/c+
- Xi/c+: semileptonic decay
- semileptonic decay: Xi/c+
- Xi/c+: branching ratio
- Xi/c0: electroproduction
References(19)
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