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Published June 6, 2014 | Submitted + Published
Journal Article Open

Evidence for the baryonic decay B[bar]^0 → D^0ΛΛ[bar]


Evidence is presented for the baryonic B meson decay B[bar]^0 →D^0 ΛΛ[bar] based on a data sample of 471×10^6 BB[bar] pairs collected with the BABAR detector at the PEP-II asymmetric e^+ e^− collider located at the SLAC National Accelerator Laboratory. The branching fraction is determined to be B(B[bar]^0 →D ^0ΛΛ[bar] )=(9.8^(+2.9)_(−2.6) ±1.9)×10^(−6), corresponding to a significance of 3.4 standard deviations including additive systematic uncertainties. A search for the related baryonic B meson decay B[bar]^ 0 →D^0Σ^0Λ[bar] with Σ^0 →Λγ is performed and an upper limit B(B[bar]^ 0 →D^0Σ^0 Λ[bar] +B[bar]^ 0 →D^0 ΛΣ[bar]^ 0 )<3.1×10^(−5) is determined at 90% confidence level.

Additional Information

© 2014 American Physical Society. Received 27 January 2014; Published 6 June 2014. We are grateful for the extraordinary contributions of our PEP-II colleagues in achieving the excellent luminosity and machine conditions that have made this work possible. The success of this project also relies critically on the expertise and dedication of the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and the kind hospitality extended to them. This work is supported by the U.S. Department of Energy and National Science Foundation, the Natural Sciences and Engineering Research Council (Canada), the Commissariat à l'Energie Atomique and Institut National de Physique Nucléaire et de Physique des Particules (France), the Bundesministerium für Bildung und Forschung and Deutsche Forschungsgemeinschaft (Germany), the Istituto Nazionale di Fisica Nucleare (Italy), the Foundation for Fundamental Research on Matter (The Netherlands), the Research Council of Norway, the Ministry of Education and Science of the Russian Federation, Ministerio de Ciencia e Innovación (Spain), and the Science and Technology Facilities Council (United Kingdom). Individuals have received support from the Marie-Curie IEF program (European Union), the A. P. Sloan Foundation (USA) and the Binational Science Foundation (USA-Israel).

Attached Files

Published - PhysRevD.89.112002.pdf

Submitted - 1401.5990v1.pdf


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