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Week 3: Renormalizable lagrangians and the Standard model

What is the Lagrangian Standard Model?
This version of the Standard Model is written in the Lagrangian form.
The Lagrangian is a fancy way of writing an equation to determine the state of a changing system and explain the maximum possible energy the system can maintain.
Is the Standard Model Renormalizable?
The Standard Model is renormalizable and mathematically self-consistent, however despite having huge and continued successes in providing experimental predictions it does leave some unexplained phenomena.
What does it mean for a theory to be Renormalizable?
One short definition is that if a theory is renormalizable, then the adjustment of a finite number of parameters (such as the bare electron charge and mass) allows us to calculate the results of all observable in finite terms.
renormalization, the procedure in quantum field theory by which divergent parts of a calculation, leading to nonsensical infinite results, are absorbed by redefinition into a few measurable quantities, so yielding finite answers.

5 déc. 2009 · I want to explain to you the basic idea of renormalization in quantum field theory, and I want to say a bit about how it's related to Autres questions

Week 3: Renormalizable lagrangians and the Standard model

What is the Lagrangian Standard Model?

Is the Standard Model Renormalizable?

What does it mean for a theory to be Renormalizable?