A Study of anti-B ---> Xi(c) anti-Lambda-(c) and anti-B ---> anti-Lambda+(c) anti-Lambda-(c) anti-K decays at BABAR
Collaboration
8 pages
Published in:
- Phys.Rev.D 77 (2008) 031101
e-Print:
- 0710.5775 [hep-ex]
Report number:
- BABAR-PUB-07-053,
- SLAC-PUB-12938
Experiments:
View in:
Citations per year
Abstract: (arXiv)
We report measurements of B-meson decays into two- and three-body final states containing two charmed baryons using a sample of 230 million Y(4S) -> B Bbar decays. We find significant signals in two modes, measuring branching fractions BF(B^- -> \Lambda_c^+ \Lambda_c^- K^-) = (1.14 +- 0.15 +- 0.17 +- 0.60) x 10^{-3} and BF(B^- -> \Xi_c^0 \Lambda_c^-) x BF(\Xi_c^0 -> \Xi^- \pi^+) = (2.08 +- 0.65 +- 0.29 +- 0.54) x 10^{-5}, where the uncertainties are statistical, systematic, and from the branching fraction BF(\Lambda_c^+ -> p K^- \pi^+), respectively. We also set upper limits at the 90% confidence level on two other modes: BF(B0bar -> \Xi_c^+ \Lambda_c^-) x BF(\Xi_c^+ -> \Xi^- \pi^+ \pi^+) < 5.6 x 10^{-5} and BF(B0bar -> \Lambda_c^+ \Lambda_c^- K0bar) < 1.5 x 10^{-3}. We observe structure centered at an invariant mass of 2.93 GeV/c^2 in the \Lambda_c^+ K^- mass distribution of the decay B^- -> \Lambda_c^+ \Lambda_c^- K^-.Note:
- 8 pages, 5 postscript figures, to be submitted to PRD-RC
- 12.15.Hh
- 13.25.Hw
- 11.30.Er
- electron positron: colliding beams
- electron positron: annihilation
- Upsilon(10570): electroproduction
- B: pair production
- B: hadronic decay
- charmed baryon: pair production
- Xi/c0: hadronic decay
References(18)
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