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Observation of two excited charmed baryons decaying into Lambda(+)(c)pi(+/-)
Ammar, Raymond G. Baringer, Philip S. Bean, Alice Besson, David Zeke Coppage, Don Darling, C. Davis, Robin E. P. Hancock, N. Kotov, S. Kravchenko, I.
Ammar, Raymond G.
Baringer, Philip S.
Bean, Alice
Besson, David Zeke
Coppage, Don
Darling, C.
Davis, Robin E. P.
Hancock, N.
Kotov, S.
Kravchenko, I.
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Abstract
Using data recorded by the CLEO-II detector at CESR, we report evidence of a pair of excited charmed baryons, one decaying into Lambda(c)(+)pi(+)2 and the other into Lambda(c)(+)pi(-). The doubly charged state has a measured mass difference M(Lambda(c)(+)pi(+)) - M(Lambda(c)(+)) of 234.5 +/- 1.1 +/- 0.8 MeV/c(2) and a width of 17.9(-3.2)(+3.8) +/- 4.0 MeV/c(2), and the neutral state has a measured mass difference M(Lambda(c)(+)pi(-)) - M(Lambda(c)(+)) of 232.6 +/- 1.0 +/- 0.8 MeV/c(2) and a width of 13.0(-3.0)(+3.7) +/- 4.0 MeV/c(2). We interpret these data as evidence of the Sigma(c)8(++) and Sigma c*(0), the spin 3/2(+) excitations of the Sigma(c) baryons.
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1997-03
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AMERICAN PHYSICAL SOC
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Brandenburg, G, Briere, RA, et al. Observation of two excited charmed baryons decaying into Lambda(+)(c)pi(+/-). PHYSICAL REVIEW LETTERS. March 1997. 78(12) : 2304-2308