Why is it interesting?

Natural phenomena, when observed with poorer resolution, become simpler. This is simple fact. When we describe the Moon trajectory orbiting around Earth, we can safely approximate both bodies with material points and neglect all the complexity of geography, crystalline structure, chemical composition, and terrestrial biology. This is technically known as the “spherical-cow approximation”, which is a basic tool of effective field theory. The observation that the universe is roughly uniform and isotropic at large scales supports the point of view that simplicity dominates the far IR.

https://arxiv.org/pdf/1710.07663.pdf

Layman

• http://www.preposterousuniverse.com/blog/2013/06/20/how-quantum-field-theory-becomes-effective/

Student

• How to use the Standard Model effective field theory by Brian Henning et. al.

Researcher

Common Question 1

Common Question 2

Examples

Example1

Example2:

History