### Abstract

We begin with quantum electrodynamics (QED), which successfully combines classical electrodynamics, quantum mechanics, and special relativity. QED inherits the gaugetransformation symmetry-called U(1) in group-theoretical language-that classical electromagnetism possesses. QED is also renormalizable; that is, it is well defined mathematically: Infinities that appear at intermediate stages disappear when the theory is expressed in terms of a finite number of measured quantities, such as mass and charge.

Original language | English (US) |
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Pages | 52-53 |

Number of pages | 2 |

Volume | 72 |

No | 2 |

Specialist publication | Physics Today |

DOIs | |

State | Published - Feb 1 2019 |

Externally published | Yes |

### All Science Journal Classification (ASJC) codes

- Physics and Astronomy(all)

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## Cite this

Gaillard, M. K., & Langacker, P. G. (2019). Constructing the theory of the standard model.

*Physics Today*,*72*(2), 52-53. https://doi.org/10.1063/PT.3.4142