A loop momentum is an independent momentum integrated over in a Feynman diagram. Momentum conservation leaves one independent loop momentum for each cycle counted by the loop order.
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- Loop order
- Feynman diagram
- Perturbative quantum field theory
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- Feynman integral
- Local subtraction with a sharp momentum cutoff
- Loop Feynman diagram
- Loop momentum
- One-loop Feynman diagram
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- Scalar bubble integral
- Scalar graph power-counting identity
- Superficial degree of divergence
- Tadpole integral
- Ultraviolet divergence
- Ultraviolet finiteness
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