Operator Classes

The classes are nested as follows:

nesting of the operator classes: solid lines means “has many”, dashed lines means “evolves into”

• Operator / OperatorMatrixElement

  • represents a configuration for a fixed final evolution point \((Q^2,n_f)\)

  • performs the actual computation

  • uses the 3-dimensional Operator Anomalous Dimension Basis

  • its OpMember are only valid in the current threshold area

• PhysicalOperator / MatchingCondition

  • is the connection of the Operator between the different flavor bases

  • is initialized with the 3-dimensional Operator Anomalous Dimension Basis

  • does recombine the operator in the Operator Intrinsic QCD Evolution Basis (see Matching Conditions)

  • exports the operators to Operator Flavor Basis in a ndarray

• OpMember

  • represents a single operator in Mellin space for a given element of the Operator Bases

  • inside Operator / OperatorMatrixElement they are in Operator Anomalous Dimension Basis

  • inside PhysicalOperator / MatchingCondition they are in Operator Intrinsic QCD Evolution Basis