It’s a… Baryon!

In a paper submitted to Physical Review Letters, the CMS collaboration described the first observation of an excited, neutral Xi_b baryon, a particle made up of three quarks, including one beauty quark.

via symmetry breaking » Blog Archive » CMS collaboration discovers its first new particle.

The major newswires and news outlets havent covered this discovery, perhaps because theyre trying to decide how to spell, typeset, and explain the particles name.

via Language Log » Neutral Xi_b^star, Xib^{0}, Ξb0, whatever.