Observation of two narrow states decaying into Xi(+)(c)gamma and Xi(0)(c)gamma

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Issue Date
1999-01Author
Ammar, Raymond G.
Baringer, Philip S.
Bean, Alice
Besson, David Zeke
Coppage, Don
Davis, Robin E. P.
Kotov, S.
Kravchenko, I.
Kwak, Nowhan
Zhou, L.
Publisher
AMERICAN PHYSICAL SOC
Type
Article
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Show full item recordAbstract
We report the first observation of two narrow charmed strange baryons decaying to Xi(c)(+) gamma and Xi(c)(0)gamma, respectively, using data from the CLEO II detector at the Cornell Electron Storage Ring. We interpret the observed signals as the Xi(c)(+/) (c{su}) and Xi(c)(0/) (c{sd}), the symmetric partners of the well-established antisymmetric Xi(c)(+) (c[su]) and Xi(c)(0) (c[sd]). The mass differences M(Xi(c)(+/)) - M(Xi(c)(+)) and M(Xi(c)(0/)) - M(Xi(c)(0)) have been measured to be 107.8 +/- 1.7 +/- 2.5 and 107.0 +/- 1.4 +/- 2.5 MeV/c(2), respectively. [S0031-9007(98)08253-2].
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Citation
Jessop, CP, Lingel, K, et al. Observation of two narrow states decaying into Xi(+)(c)gamma and Xi(0)(c)gamma. PHYSICAL REVIEW LETTERS. January 1999. 82(3) : 492-496
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