Particle Adventure 3 - Announcements Homework assignment...

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Unformatted text preview: Announcements Homework assignment #10 is due this Wed at 4 PM (this is the last homework assignment of the year) 3 rd exam is Thurs Dec 4; I will spend at least part of the lecture Tues Dec 2 on review for this exam (and will also take questions for the final) I can try to schedule a Q&A session during finals week/weekend before, if there is a desire Final exam is on Friday Dec. 12 10 AM-12 PM in this room If you have a conflict, please sign up after lecture Neil deGrasse Tyson will be at MSU Jan 22 and will be speaking in this room at 4:10 PM Loose ends: Geiger counter Geiger was one of Rutherfords students who discovered the nucleus He developed this device for testing for presence of radioactivity Any charged particles that pass through active area of counter will cause it to register a count A Classification of Particles There emerged a classification system for all these particles. Generally speaking there were three broad categories: Photons , which seemed to be in a category by itself. Hadrons- that interact through the strong force, with two sub categories or classes Mesons particles smaller than proton Baryons (Greek for Heavy)- particles same size or larger than proton Leptons (Greek for small or light)- group of particles that participate in the weak force. All are smaller than the lightest hadron. Examples include: electron, muons, and neutrinos. Leptons appear to be truly elementary, with no structure (ie they seem point-like) Tables of particles Murray Gell-Mann Starting in the early 1960s, Gell-Mann tries a variety of ways to organize the vast zoo of particles being discovered. He is guided by the example of the periodic table of elements. Eventually he hit upon the Eight-fold Way With the symmetry of the pattern, it was possible to discover missing particles, such as the - particle In addition, the pattern hinted at an underlying structure. Quarks...
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This note was uploaded on 10/17/2011 for the course ECON 101 taught by Professor Thompson during the Spring '11 term at Michigan State University.

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Particle Adventure 3 - Announcements Homework assignment...

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