Hi there,(adsbygoogle = window.adsbygoogle || []).push({});

As in Ta-Pei Cheng and Li's book for example the W boson propagator is given by :

## \frac{-i}{k^2-M^2} [g_{\mu\nu}+ (\zeta-1) k_\mu k_\nu/(k^2 - \zeta M^2)] ##

At the unitary gauge ## \zeta = \infty ##, where the W propagator becomes :

## \frac{-i}{k^2-M^2} [g_{\mu\nu}- k_\mu k_\nu/ M^2 ] ##

It is not clear for me how when we set ## \zeta ## to ## \infty ##, we got the last formula in the unitary gauge ?

Bests.

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# W boson propagator

Loading...

Similar Threads - boson propagator | Date |
---|---|

A Why is a glueball not massless, if it's a Goldstone boson? | Feb 6, 2018 |

B What does the Higgs particle consist of? | Jan 27, 2018 |

I ## k^0-\bar{k^0} ## mixing and gauge boson propagator | Jan 23, 2017 |

Basic question: Propagator of a scalar boson | Mar 10, 2015 |

Vector Boson Propagator and gauge | Sep 1, 2014 |

**Physics Forums - The Fusion of Science and Community**