Colloquium – History of Quantum Chromodynamics

by | Nov 25, 2013 | Events, Talk

Colloquium – History of Quantum Chromodynamics In 1971 Gell-Mann and I introduced the color quantum number of the quarks. One year later the exact color symmetry group was interpreted as the gauge group of a new gauge theory, quantum chromodynamics. The self-coupling...

Colloquium – Reading the Record of Ancient Impacts

by | Oct 28, 2013 | Events, Talk

Colloquium – Reading the Record of Ancient Impacts Debris from asteroids and comets continually bombards the Earth. Large impacts launch ejecta on trajectories that transport it thousands of kilometers from the impact site. These events are recorded in discrete layers...

Cosmological Simulations of Galaxy Formation

by | Sep 19, 2013 | Events, Talk

Cosmological Simulations of Galaxy Formation We present a suite of simulated galaxies that match a wide range of scaling relations over a large mass range at z=0, and follow the evolution of these relations and confront them with observational constraints. We then...

Searching for Dark Matter with radiotelescopes

by | Sep 19, 2013 | Events, Talk

Searching for Dark Matter with radiotelescopes The axion is a cold dark matter candidate, theoretically motivated to solve the strong-CP problem. Axions spontaneously decay into two photons and also convert into photons in a magnetic field. I summarize the present and...