Observation of an excited state of the [Lambda][sub [ital c]][sup +] baryon

Journal Article · Mon Feb 14 04:00:00 EST 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.72.961· OSTI ID:5144627

Frabetti, P L ^[1]; Cheung, H W.K.; Cumalat, J P; Dallapiccola, C; Ginkel, J F; Greene, S V; Johns, W E; Nehring, M S ^[2]; Butler, J N; Cihangir, S; Gaines, I; Garbincius, P H; Garren, L; Gourlay, S A; Harding, D J; Kasper, P; Kreymer, A; Lebrun, P; Shukla, S ^[3]; Bianco, S ; Fabbri, F L; Sarwar, S; Zallo, A ^[4]; Culbertson, R; Gardner, R W; Greene, R; Wiss, J ^[5]; Alimonti, G; Bellini, G; Caccianiga, B; Cinquini, L; Di Corato, M; Giammarchi, M; Inzani, P; Leveraro, F; Malvezzi, S; Menasce, D; Meroni, E; Moroni, L; Pedrini, D; Perasso, L; Sala, A

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1. Dipartimento di Fisica dell'Universita and Istituto Nazionale di Fisica Nucleare, Bologna, I-40126 Bologna (Italy)
2. University of Colorado, Boulder, Colorado 80309 (United States)
3. Fermilab, Batavia, Illinois 60510 (United States)
4. Laboratori Nazionali di Frascati dell'Istituto Nazionale di Fisica Nucleare, I-00044 Frascati (Italy)
5. University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)

An observation of an excited [Lambda][sub [ital c]][sup +*] baryon decaying to [Lambda][sub [ital c]][sup +][pi][sup +][pi][sup [minus]], with [Lambda][sub [ital c]][sup +][r arrow][ital pK][sup [minus]][pi][sup +], is presented. We reconstruct 39.7[plus minus]8.7[Lambda][sub [ital c]][sup +*] baryons with a mass of 340.4[plus minus]0.6[plus minus]0.3 MeV/[ital c][sup 2] above the [Lambda][sub [ital c]][sup +] mass. The upper limit on the resonant branching ratio is [ital B]([Lambda][sub [ital c]][sup +*][r arrow][Sigma][sub [ital c]][pi][sup [plus minus]])/[ital B]([Lambda][sub [ital c]][sup +*][r arrow][Lambda][sub [ital c]][sup +] [pi][sup +][pi][sup [minus]])[lt]36% at the 90% confidence level.

• OSTI ID: 5144627
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 72:7; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

662360 -- Decays of Baryons-- (1992-)
662410* -- Properties of Baryons & Baryon Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BOSONS
BRANCHING RATIO
CHARM PARTICLES
CHARMED BARYONS
DECAY
ELEMENTARY PARTICLES
ENERGY LEVELS
EXCITED STATES
FERMIONS
HADRONS
KAONS
KAONS MINUS
LAMBDA C PLUS BARYONS
MASS
MESONS
PARTICLE DECAY
PIONS
PIONS MINUS
PIONS PLUS
PSEUDOSCALAR MESONS
SIGMA C-2450 BARYONS
STRANGE MESONS
STRANGE PARTICLES