Stable Sexaquark
Abstract
It is proposed that the neutral, B=2, flavor singlet sexaquark (S) composed of uuddss quarks, has mass mS <~ 2 GeV. If mS < 2 (mp + me), it is absolutely stable, while for mS < mp+me + mLambda, its lifetime can be greater than the age of the Universe. Lattice gauge theory cannot yet predict mS, but indirect evidence supports the hypothesis of stability. A stable S is consistent with QCD theory and would have eluded detection in accelerator and non-accelerator experiments. If it exists, the S is a good Dark Matter candidate. Analyses of existing Upsilon decay and LHC data can be used to discover it and measure its mass.
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