Observation of the Omega(-)(b) baryon and measurement of the properties of the Xi(-)(b) and Omega(-)(b) baryons RID G-1087-2011 RID E-4473-2011
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- MORELLO, MICHAEL JOSEPH
Publication date
January 2009
DOIAbstract
We report the observation of the bottom, doubly-strange baryon Omega(-)(b) through the decay chain Omega(-)(b)-> j/psi Omega(-), where J/psi ->mu(+)mu(-), Omega(-)->Lambda K(-), and Lambda -> p pi(-), using 4.2 fb(-1) of data from p (p) over bar collisions at root s = 1.96 TeV, and recorded with the Collider Detector at Fermilab. A signal is observed whose The Omega(-)(b) mass is measured to be 6054.4 +/- 6.8(stat) +/- 0.9(syst) MeV/c(2). The lifetime of the Omega(-)(b) baryon is measured to be 1.13(-0.40)(+0.53)(stat) +/- 0.02(syst) ps. In addition, for the Xi(-)(b) baryon we measure a mass of 5790.9 +/- 2.6(stat) +/- 0.8(syst) MeV/c(2) and a lifetime of 1.56(-0.25)(+0.27)(stat) +/- 0.02(syst) ps. Under the assumption that the Xi(-)(b) and...
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