# Analytic properties of scattering amplitudes

- Institution: CERN
- Department: Theory Colloquia
- Speaker: Hofie Hannesdottir
- Year: 2024
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3017898)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

In this talk, we will explore intricate ways in which physical principles are encoded in scattering amplitudes. In particular, we will discuss the imprints of causality and crossing symmetry on the analyticity properties of scattering amplitudes, and show how different observables can be related to one another via analytic continuations. We highlight how such physical insights can be leveraged to simplify computations in perturbation theory, and deepen our understanding of collider observables. .

0:00:00 Slide 1

0:01:57 Slide 2

0:04:06 Slide 3

0:06:34 Slide 4

0:09:03 Slide 5

0:11:05 Slide 6

0:13:03 Slide 7

0:15:04 Slide 8

0:16:57 Slide 9

0:18:21 Slide 10

0:19:38 Slide 11

0:21:49 Slide 12

0:24:24 Slide 13

0:25:43 Slide 14

0:26:49 Slide 15

0:28:45 Slide 16

0:32:35 Slide 17

0:33:46 Slide 18

0:36:57 Slide 19

0:39:05 Slide 20

0:41:20 Slide 21

0:43:17 Slide 22

0:46:18 Slide 23

0:47:29 Slide 24

0:50:22 Slide 25

0:51:50 Slide 26

0:54:46 Slide 27

0:58:12 Slide 28

0:59:12 Slide 29

1:01:38 Slide 30

1:08:05 Slide 31

## Lectures

1. [Analytic properties of scattering amplitudes](https://invisiblenetwork.ai/learn/cern/3017898/535049d1c135), 1 h 10 min (CERN's player)