# Violation of Particle Anti-particle Symmetry

- Institution: CERN
- Department: CERN Summer Student Lecture Programme,2001
- Speaker: Z Nakada
- Year: 2001
- Language: English
- Subjects: Physics
- Source: [CERN](https://videos.cern.ch/record/3007748)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

Symmetry is a fundamental concept which can be found in the whole range of human activities e. g. from arts to science. The beauty of a statues is often related to its symmetric form. In physics, all the laws are related to some sort of symmetry. Equally important is a small breakdown ofsymmetry. Even for the case of a statue, its beauty might be enhanced by introducing small distortions. In this course, we investigate the role symmetry in the world of elementary particles. Some symmetries found there are very similar to those which can be seen in our daily life, while others are more exotic and related to the quantum nature of the elementary particles. Our particular focus ismade on symmetry and its violation between the matter and anti-matter, known as CP violation. It is experimentally well established that particleand anti-particle behave a tiny bit differently in the world of elementary particles. We discuss how this would be explained and how we can extendour knowledge. Evolution of our universe is strongly influenced by CP violation. So far, we see anti matter in our universe. Is this the largest CP violation effect ever seen?.

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## Lectures

1. [Violation of Particle Anti-particle Symmetry](https://invisiblenetwork.ai/learn/cern/3007748/3be3afc4ceea), 50 min (CERN's player)