## EVENT DETAILS AND ABSTRACT

**Geometry/Physics Seminar**
**Title:** Tinkertoys

**Speaker:** Jacques Distler

**Speaker Info:** UT Austin

**Brief Description:**

**Special Note**:

**Abstract:**

In 2009, Davide Gaiotto suggested a framework for constructing families of
4D N=2 supersymmetric (conformal) quantum field theories, parametrized by
M_{g,n} -- the moduli space of genus-g curves with punctures. I will describe
how such theories may be classified by "tinkertoys" --- building up such curves
as 3-punctured spheres connected by cylinders. For any given simple, simply-laced
Lie algebra, there is a finite list of spheres and cylinders. Punctures, which
include an outer-automorphism of the ADE Lie algebra, lead to several new
phenomena. In particular, the family of quantum field theories is more naturally
parametrized by a certain branched cover of M_{g,n}.

**Date:** Tuesday, March 05, 2013

**Time:** 1:00pm

**Where:** Lunt 101

**Contact Person:** Philsang Yoo

**Contact email:** philsang@math.northwestern.edu

**Contact Phone:**

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