From ars technica, Feb. 29, 2016: Fermilab’s found a brand-new species—the first particle with four flavors of quarks.
DZero
From IFL Science, Feb. 27, 2016: Scientists on the DZero experiment have found an incredible new particle that’s part of the exotic family of tetraquarks.
From Scientific American, Feb. 26, 2016: Evidence for a never-before-seen particle containing four types of quark has shown up in data from the Tevatron collider at Fermilab.
From Gizmodo, Feb. 25, 2016: Physicists from the DZero collaboration have announced the discovery of a new particle, believed to be part of an exotic family called “tetraquarks.”
DZero announces the newest member of the tetraquark family.
DZero discovers a new, exotic particle made up of four different quarks.
The DZero experiment will present a special Wine and Cheese seminar, “Observation of a new resonance state in the Bs pi system” this Thursday, Feb. 25, at 4 p.m. in One West. The seminar will be video streamed at http://vms.fnal.gov/asset/livevideo and the slides will be posted at http://theory.fnal.gov/jetp/. Mark your calendar to attend!
It’s hard to believe that point-like particles have spin. Yet that’s exactly what DZero recently measured – the spin of top quarks – to learn more about the details of top quark pair production.
DZero has made the first measurement of the effective cross section in J/ψ-plus-Υ events
Protons have parts that, as mentioned in previous columns, have the not terribly imaginative name of “partons.”