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Event Number 2872

  Friday, March 15th, 2013

Theory Seminar (High Energy/Cosmology)
Instantons on R^3 x S^1 and a semi-classical realization of IR renormalons
Time: 11:00 am
Place: 5310 Chamberlin
Speaker: Phillip Argyres, Cincinnati
Abstract: We study the semi-classical dynamics of four dimensional gauge theories with adjoint fermions compactified on a circle with periodic boundary conditions for the fermions. There are monopole-instantons (with fermion zero modes) and two types of monopole--anti-monopole molecules, called bions. The plasma of the type-one bions--- which carry net magnetic charge---induces a mass gap for gauge fluctuations. The type-two bion is both topologically and magnetically neutral, and its understanding requires a generalization of multi-instanton techniques in quantum mechanics to compactified field theory. We conjecture that it is the semi-classical realization of four-dimensional IR renormalons.
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