Search for Charmless Two-body Baryonic Decays of B Mesons

Details Search for Charmless Two-body Baryonic Decays of B Mesons Search for Charmless Two-body Baryonic Decays of B Mesons

2002-03-19

arxiv.org/abs/hep-ex/0203027v1

Phys.Rev.D65:091103,2002

Physics

High Energy Physics

High Energy Physics - Experiment

6 pages, 4 figures and 1 table. Submitted to Phys. Rev. D Rapid Communications

Scientific paper

10.1103/PhysRevD.65.091103

We report the results of a search for the rare baryonic decays $B^0 \to p\bar{p}$, $\Lambda\bar{\Lambda}$, and $B^+ \to p\bar{\Lambda}$. The analysis is based on a data set of $31.7\times 10^6 B\bar{B}$ events collected by the Belle detector at the KEKB $e^+e^-$ collider. No statistically significant signals are found, and we set branching fraction upper limits ${\mathcal B}(B^0 \to p\bar{p}) < 1.2 \times 10^{-6}$, ${\mathcal B}(B^0 \to \Lambda\bar{\Lambda}) < 1.0 \times 10^{-6}$, and ${\mathcal B}(B^+ \to p\bar{\Lambda}) < 2.2 \times 10^{-6}$ at the 90% confidence level.

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