Colloquium on the b quark – today at 4 p.m.


Jeffrey Appel

Among the highlights of Fermilab’s 50 years was the discovery of the fifth quark, the b quark, in 1977, where ‘b’ usually stands for “beauty,” but sometimes for “bottom.” It is the partner of the truth, or top, quark, also discovered at Fermilab 18 years later. The first manifestation of the b quark was as a tightly bound pair, a b quark stuck together with an anti-b quark, the combination being called the Upsilon particle.

In today’s colloquium, at 4 p.m. in One West, Scientist Emeritus Jeff Appel will tell the story of the discovery and how it led to studies of more beautiful particles.