Study of B{yields}{xi}{sub c}{lambda}{sub c}{sup -} and B{yields}{lambda}{sub c}{sup +}{lambda}{sub c}{sup -}K decays at BABAR

Journal Article · Thu Jan 31 23:00:00 EST 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.031101· OSTI ID:21039002

Aubert, B; Bona, M; Boutigny, D; Karyotakis, Y; Lees, J P; Poireau, V; Prudent, X; Tisserand, V; Zghiche, A ^[1]; Tico, J Garra; Grauges, E ^[2]; Lopez, L; Palano, A; Pappagallo, M ^[3]; Eigen, G; Stugu, B; Sun, L ^[4]; Abrams, G S; Battaglia, M; Brown, D N ^[5]

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1. Laboratoire de Physique des Particules, IN2P3/CNRS et Universite de Savoie, F-74941 Annecy-Le-Vieux (France)
2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
3. Universita di Bari, Dipartimento di Fisica and INFN, I-70126 Bari (Italy)
4. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
5. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

We report measurements of B-meson decays into two- and three-body final states containing two charmed baryons using a sample of 230x10{sup 6} {upsilon}(4S){yields}BB decays. We find significant signals in two modes, measuring branching fractions B(B{sup -}{yields}{lambda}{sub c}{sup +}{lambda}{sub c}{sup -}K{sup -})=(1.14{+-}0.15{+-}0.17{+-}0.60)x10{sup -3} and B(B{sup -}{yields}{xi}{sub c}{sup 0}{lambda}{sub c}{sup -})xB({xi}{sub c}{sup 0}{yields}{xi}{sup -}{pi}{sup +})=(2.08{+-}0.65{+-}0.= 29{+-}0.54)x10{sup -5}, where the uncertainties are statistical, systematic, and from the branching fraction B({lambda}{sub c}{sup +}{yields}pK{sup -}{pi}{sup +}), respectively. We also set upper limits at the 90% confidence level on two other modes: B(B{sup 0}{yields}{xi}{sub c}{sup +}{lambda}{sub c}{sup -})xB({xi}{sub c}{sup +}{yields}{xi}{sup -}{pi}{sup +}{pi}{sup +})<5.6x10{sup -5} and B(B{sup 0}{yields}{lambda}{sub c}{sup +}{lambda}{sub c}{sup -}K{sup 0})<1.5x10{sup -3}. We observe structure centered at an invariant mass of 2.93 GeV/c{sup 2} in the {lambda}{sub c}{sup +}K{sup -} mass distribution of the decay B{sup -}{yields}{lambda}{sub c}{sup +}{lambda}{sub c}{sup -}K{sup -}.

• OSTI ID: 21039002
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 77; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MINUS MESONS
B NEUTRAL MESONS
BRANCHING RATIO
ELECTRON-POSITRON INTERACTIONS
GEV RANGE
KAONS MINUS
KAONS NEUTRAL
LAMBDA C PLUS BARYONS
MASS DISTRIBUTION
MULTIPARTICLE SPECTROMETERS
PARTICLE DECAY
PARTICLE IDENTIFICATION
PEP STORAGE RINGS
PIONS PLUS
REST MASS
THREE-BODY PROBLEM
XI C PLUS BARYONS