# QFD - flavourdynamics


## https://en.wikipedia.org/wiki/Weak_interaction

[For example, **beta decay of a neutron** transforms it into a proton by the emission of an electron accompanied by an antineutrino; or, conversely a proton is converted into a neutron by the emission of a positron with a neutrino in so-called positron emission](https://en.wikipedia.org/wiki/Beta_decay)
https://en.wikipedia.org/wiki/Radioactive_decay

- VIDEO [Electroweak Theory and the Origin of the Fundamental Forces - 4 Nov 2020](https://www.youtube.com/watch?v=qKVpknSKgE0)

## [Fermi’s Theory of Beta Decay: A First **Attempt at Electroweak Unification**](https://arxiv.org/ftp/arxiv/papers/1803/1803.07147.pdf)

**mapping four fermion vertex (Fermi) to usual two-refmion-Wboson vertex**

- Fermi beta decay theory, highlighting its analogies with the spectroscopic theory

and the similarity of the formalism with the modern electroweak theory.
....
which is **compared with the emission of a photon by an atomic electron** that decays from an excited state to a lower energetic level

- [beta decay](http://websites.umich.edu/~ners311/CourseLibrary/bookchapter15.pdf)

[Fermi golden rule](https://www2.ph.ed.ac.uk/~gja/qp/qp6.pdf)

## [The neutron and its role in cosmology and particle physics](https://arxiv.org/ftp/arxiv/papers/1105/1105.3694.pdf)

https://en.wikipedia.org/wiki/Higgs_boson

# Parents

* Quantum Electrodynamics (QED)
* Electroweak InteractionQCD - chromodynamics