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Michael Price
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- In QFT, if we add a gauge breaking term to the Lagrangian, do we still need to introduce ghost particles?
Summary: In QFT, if we add a gauge breaking term to the Lagrangian, do we still need to introduce Faddeev-Popov ghost particles?
Ghosts seems to be introduced to maintain gauge invariance. But suppose we have eliminated the gauge invariance, from the start, by explicitly introducing a gauge breaking term to the Lagrangian? Do we still need to introduce ghosts?
https://en.m.wikipedia.org/wiki/Ghost_(physics)
Ghosts seems to be introduced to maintain gauge invariance. But suppose we have eliminated the gauge invariance, from the start, by explicitly introducing a gauge breaking term to the Lagrangian? Do we still need to introduce ghosts?
https://en.m.wikipedia.org/wiki/Ghost_(physics)
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