FEYN CALC SYMBOL

QuantumField


is the head of quantized fields and their derivatives. QuantumField[par, ftype, {lorind}, {sunind}] denotes a quantum field of type ftype with (possible) Lorentz-indices lorind and SU(N) indices sunind. The optional first argument par denotes a partial derivative acting on the field.

ExamplesExamplesopen allclose all

Basic Examples  (1)Basic Examples  (1)

This denotes a scalar field.
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This is a field with a Lorentz index.
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Color indices should be put after the Lorentz ones.
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is a short form for
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The first list of indices is usually interpreted as type LorentzIndex, except for OPEDelta, which gets converted to type Momentum.
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Derivatives of fields are denoted as follows.
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