The familiar denizens of the particle zoo are made of two or three quarks, but particle theory allows for states comprising any number of those fundamental particles. Finally, after decades of searching, tetraquarks seem to have been spotted.
The global network of sensors commissioned to monitor compliance with the Comprehensive Nuclear-Test-Ban Treaty has proven capable of that task and more.
SPS Movie Nights
Time and location: 8:00pm in the Bianchi Planetarium
(north of the science buildings, across from the Student Union.)
Next movie: TBD (Fall 2011)