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Published August 25, 2010 | Published
Journal Article Open

Observation of the decay B[overbar]^0 → Λ_c^+ [overbar]pπ^0


In a sample of 467×10^6 BB[overbar] pairs collected with the BABAR detector at the PEP-II collider at SLAC we have observed the decay B[overbar]^0→Λ_c^+p[overbar] π^0 and measured the branching fraction to be (1.94±0.17±0.14±0.50)×10^(-4), where the uncertainties are statistical, systematic, and the uncertainty on the Λ_c^+→pK^-π^+ branching fraction, respectively. We determine an upper limit of 1.5×10^(-6) at 90% C.L. for the product branching fraction B[script](B[overbar]^0→Σ_c^+(2455)p[overbar] )×B[script](Λ_c^+→pK^-π^+). Furthermore, we observe an enhancement at the threshold of the invariant mass of the baryon-antibaryon pair.

Additional Information

© 2010 The American Physical Society. Received 12 July 2010; published 25 August 2010. We are grateful for the excellent luminosity and machine conditions provided by our PEP-II colleagues, and for the substantial dedicated effort from the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and kind hospitality. This work is supported by DOE and NSF (USA), NSERC (Canada), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN (Italy), FOM (The Netherlands), NFR (Norway), MES (Russia), MICIIN (Spain), STFC (United Kingdom). Individuals have received support from the Marie Curie EIF (European Union), the A. P. Sloan Foundation and the Binational Science Foundation.

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Published - Aubert2010p11319Phys_Rev_D.pdf


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