Search for the Lepton-Number-Violating Decay $Ξ^- \to p μ^- μ^-$

Details Search for the Lepton-Number-Violating Decay $Ξ^- \to p μ^- μ^-$ Search for the Lepton-Number-Violating Decay $Ξ^- \to p μ^- μ^-$

2005-05-12

arxiv.org/abs/hep-ex/0505025v1

Phys.Rev.Lett.94:181801,2005

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages, 5 figures, to be published in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.94.181801

A sensitive search for the lepton-number-violating decay $\Xi^-\to p
\mu^-\mu^-$ has been performed using a sample of $\sim10^9$ $\Xi^-$ hyperons
produced in 800 GeV/$c$ $p$-Cu collisions. We obtain $\mathcal{B}(\Xi^-\to p
\mu^-\mu^-)< 4.0\times 10^{-8}$ at 90% confidence, improving on the best
previous limit by four orders of magnitude.

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