Observation of a new charmed baryon

Using the ARGUS detector at the e + e − storage ring DORIS II at DESY, we have observed a new charmed baryon state in the channel Λ c + π + π − . (All references to a specific charged state also imply the charge conjugate state.) The mass of this state was measured to be (2626.6 ± 0.5 ± 1.5) MeV/ c 2 . The product of the production cross section and branching ratio for this channel was determined to be (11.5 ± 2.5 ± 3.0) pb, and the natural width estimated to be smaller than 3.2 MeV/ c 2 at 90% CL.

electron positron: colliding beams
colliding beams: electron positron
electron positron: annihilation
annihilation: electron positron
charmed baryon: electroproduction
electroproduction: charmed baryon
charmed baryon: hadronic decay
hadronic decay: charmed baryon
charmed baryon: mass
mass: charmed baryon

References(17)

Figures(0)

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