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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.
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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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Physics & Astronomy Scholarly Works
Center for Russian, East European, and Eurasian Studies Scholarly Publications
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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
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https://hdl.handle.net/1808/1402
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