- Abstract:
- We report the observation and measurement of the mass of the bottom, strange baryon Ξb- through the decay chain Ξb-→J/ψΞ-, where J/ψ→μ+μ-, Ξ-→Λπ-, and Λ→pπ-. A signal is observed whose probability of arising from a background fluctuation is 6.6×10-15, or 7.7 Gaussian standard deviations. The Ξb- mass is measured to be 5792.9±2.5(stat) ±1.7(syst)MeV/c2. © 2007 The American Physical Society.
- Publisher copy:
- 10.1103/PhysRevLett.99.052002
-
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- Journal:
- Physical Review Letters
- Volume:
- 99
- Issue:
- 5
- Publication date:
- 2007-08-03
- DOI:
- EISSN:
-
1079-7114
- ISSN:
-
0031-9007
- URN:
-
uuid:8608e999-e4bd-44fe-b880-cefa7fc416b6
- Source identifiers:
-
117283
- Local pid:
- pubs:117283
- Language:
- English
- Copyright date:
- 2007
Journal article
Observation and mass measurement of the baryon Ξb-
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