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

Just wondering if anyone is familiar with this chapter or the subject matter. I'm trying to understand why there are an additional 5 permutations of the the three gluon vertex making 6 terms in all (equation 72.5).

I know you have to label external propagators with all different momenta in all topologically inequiv ways, so I guess permuting the 3 4-momentum r,p,q into the positions gives 3!=6 combos in total...but I'm not sure really what's going on here, what happens to the other indexes and how does one get down to the final line of (72.5)

thanks for any input

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

Join Physics Forums Today!

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

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

# Anyone familiar with Srednicki ch72?

Loading...

Similar Threads - Anyone familiar Srednicki | Date |
---|---|

A Non-standard models in QM | Feb 12, 2018 |

I Defining exchange statistics of anyons in terms of Berry phase | Mar 17, 2017 |

I Fermions, Bosons and Anyons. | Feb 21, 2017 |

B Has anyone tested a polarization filter sending through photon by photon? | Jan 28, 2017 |

Is anyone here familiar with the dynamical Casimir effect? | Jan 27, 2015 |

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