Omega baryon

[3] The discovery was a great triumph in the study of quarks, since it was found only after its existence, mass, and decay products had been predicted in 1961 by the American physicist Murray Gell-Mann and, independently, by the Israeli physicist Yuval Ne'eman.

A discovery of this particle was first claimed in September 2008 by physicists working on the DØ experiment at the Tevatron facility of the Fermi National Accelerator Laboratory.

In May 2009, the CDF collaboration made public their results on the search for the Ω−b based on analysis of a data sample roughly four times the size of the one used by the DØ experiment.

In February 2013 the LHCb collaboration published a measurement of the Ω−b mass that is consistent with, but more precise than, the CDF result.

Their masses and widths were reported, but their quantum numbers could not be determined due to the large background present in the sample.

Bubble chamber trace of the first observed Ω baryon event at Brookhaven National Laboratory, adapted from original tracing. The tracks of neutral particles (dashed lines) are not visible in the bubble chamber. The collision of a K − meson with a proton creates an Ω − , a K 0 and a K + . The Ω − decays into a π − and a Ξ 0 , which in turn decays into a Λ 0 and a π 0 . The Λ 0 decays into a proton and a π − . The π 0 , invisible due to its short lifetime, decays into two photons (γ), which in turn each create an electron-positron pair .
Quark structure of omega baryon (
Ω −
)