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Fermilab Experiment Discovers a Heavy Relative of the Neutron


July 20, 2011

image of the CDF detector Scientists of the CDF collaboration at DOE's Fermilab announced the observation of a new particle, the neutral Xi-sub-b. This particle contains three quarks: A strange quark, an up quark and a bottom quark (s-u-b). While its existence was predicted by the Standard Model, the observation of the neutral Xi-sub-b is significant because it strengthens our understanding of how quarks form matter. Fermilab physicist Pat Lukens presented the discovery at Fermilab on Wed., July 20. Full Story

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DOE/Fermi National Accelerator Laboratory

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