Measurements of {lambda}{sub c}{sup +} branching fractions of Cabibbo-suppressed decay modes involving {lambda} and {sigma}{sup 0}

Journal Article · Thu Mar 01 04:00:00 EST 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.052002· OSTI ID:21020038

Aubert, B; Barate, R; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, J P; Poireau, V; Tisserand, V; Zghiche, A ^[1]; Grauges, E ^[2]; Palano, A; Pappagallo, M; Pompili, A ^[3]; Chen, J C; Qi, N D; Rong, G; Wang, P; Zhu, Y S ^[4]; Eigen, G; Ofte, I ^[5]

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1. Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux (France)
2. IFAE, Universitat Autonoma de Barcelona, E-08193 Bellaterra, Barcelona (Spain)
3. Universita di Bari, Dipartimento di Fisica and INFN, I-70126 Bari (Italy)
4. Institute of High Energy Physics, Beijing 100039 (China)
5. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)

We measure the branching ratios of the Cabibbo-suppressed decays {lambda}{sub c}{sup +}{yields}{lambda}K{sup +} and {lambda}{sub c}{sup +}{yields}{sigma}{sup 0}K{sup +} relative to the Cabibbo-favored decay modes {lambda}{sub c}{sup +}{yields}{lambda}{pi}{sup +} and {lambda}{sub c}{sup +}{yields}{sigma}{sup 0}{pi}{sup +} to be 0.044{+-}0.004 (stat.){+-}0.003 (syst.) and 0.038{+-}0.005 (stat.){+-}0.003 (syst.), respectively. We set an upper limit on the branching ratio at the 90% confidence level for {lambda}{sub c}{sup +}{yields}{lambda}K{sup +}{pi}{sup +}{pi}{sup -} of 4.1x10{sup -2} relative to {lambda}{sub c}{sup +}{yields}{lambda}{pi}{sup +}, and for {lambda}{sub c}{sup +}{yields}{sigma}{sup 0}K{sup +}{pi}{sup +}{pi}{sup -} of 2.0x10{sup -2} relative to {lambda}{sub c}{sup +}{yields}{sigma}{sup 0}{pi}{sup +}. We also measure the branching fraction for the Cabibbo-favored mode {lambda}{sub c}{sup +}{yields}{sigma}{sup 0}{pi}{sup +} relative to {lambda}{sub c}{sup +}{yields}{lambda}{pi}{sup +} to be 0.977{+-}0.015 (stat.){+-}0.051 (syst.). This analysis was performed using a data sample with an integrated luminosity of 125 fb{sup -1} collected by the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC.

• OSTI ID: 21020038
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 75; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BRANCHING RATIO
ELECTRON-POSITRON INTERACTIONS
KAONS PLUS
LAMBDA C PLUS BARYONS
MULTIPARTICLE SPECTROMETERS
PARTICLE DECAY
PARTICLE IDENTIFICATION
PEP STORAGE RINGS
PIONS MINUS
PIONS PLUS
SIGMA NEUTRAL PARTICLES