**Quantum Field Theory without Feynman Diagrams**

*Speaker: Andrew McLeod*

#### Time: 12:30pm October 19th, 2016

#### Location: SUSB 4006

**Abstract**

Feynman diagrams provide us with a nice pictorial intuition for what is happening when particles interact at the smallest scales we know how to describe. However, it has proven computationally intractable to use Feynman diagrams to compute most physically interesting quantities beyond the first few terms in perturbation theory. Corresponding, there exists significant interest in developing alternative methods for calculating these quantities. I will talk about one such alternate method, by means of which physical quantities can hope to be 'bootstrapped'. To demonstrate this method I will focus on the example of the soft anomalous dimension that governs the infrared behavior of massless gauge theories.