







This Week at Physics 

<< Fall 2012  Spring 2013  Fall 2013 >> 
Subscribe to receive email announcements of events 
Events on Friday, March 15th, 2013
 Theory Seminar (High Energy/Cosmology)
 Instantons on R^3 x S^1 and a semiclassical realization of IR renormalons
 Time: 11:00 am
 Place: 5310 Chamberlin
 Speaker: Phillip Argyres, Cincinnati
 Abstract: We study the semiclassical dynamics of four dimensional gauge theories with adjoint fermions compactified on a circle with periodic boundary conditions for the fermions. There are monopoleinstantons (with fermion zero modes) and two types of monopoleantimonopole molecules, called bions. The plasma of the typeone bions which carry net magnetic chargeinduces a mass gap for gauge fluctuations. The typetwo bion is both topologically and magnetically neutral, and its understanding requires a generalization of multiinstanton techniques in quantum mechanics to compactified field theory. We conjecture that it is the semiclassical realization of fourdimensional IR renormalons.
 Add this event to your calendar
 Physics Department Colloquium
 New perspectives on quark confinement
 Time: 3:30 pm
 Place: 2241 Chamberlin Hall (coffee at 4:30 pm)
 Speaker: Philip Argyres, University of Cincinnati
 Abstract: The confinement of quarks inside protons and neutrons is thought to follow from the theory of the strong force, quantum chromodynamics (QCD). By now very convincing numerical evidence for this has been found by computer simulations of QCD, but an actual derivation of confinement using analytical techniques has resisted all attempts to date. This talk will review the concepts and problems involved in trying to explain confinement analytically, and will present some recent work that sheds light on when and how confinement arises when QCD and similar theories are given periodic boundary conditions in one spatial direction.
 Host: Hashimoto
 Poster: http://www.physics.wisc.edu/twap/posters/2013/2869.pdf
 Video: http://www.physics.wisc.edu/vod/2013/03/15.html
 Add this event to your calendar