Measurement of the masses and widths of the $Σ_{c}^{+ +}$ and $Σ_{c}^{0}$ charmed baryons

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8 March 2002

journal article
research article
Published by American Physical Society (APS) in Physical Review D

Vol. 65 (7) , 071101
https://doi.org/10.1103/physrevd.65.071101

Abstract

Using data recorded by the CLEO II and CLEO II.V detector configurations at CESR, we report new measurements of the masses of the

Σ_{c}^{+ +}

and

Σ_{c}^{0}

charmed baryons, and the first measurements of their intrinsic widths. We find

M (Σ_{c}^{+ +}) - M (Λ_{c}^{+}) = 167.4 \pm 0.1 \pm 0.2 MeV,

Γ (Σ_{c}^{+ +}) = 2.3 \pm 0.2 \pm 0.3 MeV,

and

M (Σ_{c}^{0}) - M (Λ_{c}^{+}) = 167.2 \pm 0.1 \pm 0.2 MeV, Γ (Σ_{c}^{0}) = 2.5 \pm 0.2 \pm 0.3 MeV,

where the uncertainties are statistical and systematic, respectively.

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