Hemingway, R. J. ; Armenteros, R. ; Dionisi, C. ; Gavillet, Ph. ; Gurtu, A. ; Holmgren, S. O. ; Losty, M. J. ; Marin, J. C. ; Mazzucato, M. ; Montanet M., L. ; Blokzijl, R. ; De Groot, A. J. ; Jongejans, B. ; Kluyver, J. C. ; Van Leeuwen, W. M. ; Massaro, G. G. G. ; Tenner, A. G. ; Wolters, G. F. ; Heinen, P. M. ; Kittel, E. W. ; Metzger, W. J. ; Tiecke, H. G. J. M. ; Timmermans, J. J. M. ; Van De Walle, R. T. ; Foster, B. ; Grossmann, P. ; Lamb, P. R. ; Lloyd, J. L. ; Wells, J. (1978) Ω- Produced in K̅p reactions at 4.2 GeV/c Nuclear Physics B, 142 (3). pp. 205-219. ISSN 0550-3213
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Official URL: http://www.sciencedirect.com/science/article/pii/0...
Related URL: http://dx.doi.org/10.1016/0550-3213(78)90197-9
Abstract
Forty Ω- events have been observed in a large (133 events/βb) experiment at 4.2 GeV/c incident K̅ momentum. Thirty nine of the events come from the three-body reaction K̅P→Ω̅K+K0. The Ω- is mainly produced in the forward hemisphere (direction of the incident K̅). The lifetime is measured to be τ = (0.75 +0.14-0.11 × 10−10 sec substantially less than the Particle Data Group value of (1.3 −0.3+0.2) × 10−10 sec. The mass is determined to be 1671.7 ± 0.6 MeV, in good agreement with other determinations. The decay asymmetry parameter α (for the decay mode Ω̅→ΛK̅) is found to be −0.2 ± 0.4.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 83606 |
| Deposited On: | 21 Feb 2012 14:41 |
| Last Modified: | 21 Feb 2012 14:41 |
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