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Observation and Mass Measurement of the Baryon Ξb-

CollaborationWith : Campanelli, Mario / Clark, Allan Geoffrey / Hamilton, Andrew / Lefevre, Régis / Moed, Shulamit / Sfyrla, Anna / Shreyber, Irina / Vallecorsa, Sofia / Wu, Xin
Published in Physical Review Letters. 2007, vol. 99, no. 05, p. 052001
Abstract We report the observation and measurement of the mass of the bottom, strange baryon Ξ−b through the decay chain Ξ−b→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 Ξ−b mass is measured to be 5792.9±2.5(stat) ±1.7(syst)  MeV/c2.
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CDF COLLABORATION. Observation and Mass Measurement of the Baryon Ξb-. In: Physical Review Letters, 2007, vol. 99, n° 05, p. 052001. https://archive-ouverte.unige.ch/unige:38402

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Deposited on : 2014-07-01

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