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Observation and mass measurement of the baryon Ξ_{b}^{-}

Journal article published in 2007 by P. Renton, M. Rescigno, S. Richter, F. Rimondi, L. Ristori, A. Robson, T. Rodrigo, E. Rogers, S. Rolli, R. Roser, M. Rossi, R. Rossin, P. Roy, A. Ruiz, J. Russ and other authors.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.

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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.