Build the Standard Model Lagrangian

Build the gauge-invariant minimal Standard Model Lagrangian one conceptual layer at a time.

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Overview Build the equation Equation Atlas Art mode later

Guided route · symmetric phase

Build the equation.

The Standard Model Lagrangian is not a single inspired guess. Its broad structure follows from the chosen fields, Lorentz invariance, renormalisability, and local \(SU(3)_c\times SU(2)_L\times U(1)_Y\) gauge symmetry.

Construction

Equation so far Preparing catalogue…

Start with the ingredients

Step 1 of 6

Symmetry and fields

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What this chapter does—and does not claim. The symmetry and field content strongly constrain the renormalisable Lagrangian, but they do not predict the numerical gauge couplings, Higgs parameters, or Yukawa matrices. Those remain measured inputs.