Input & Output

Input

The input is split into two runcards: a theory runcard and an operator runcard. Note that we are not assuming any default values for the fields, but instead the user has to provide the full definition.

The theory card defines the general setup of the calculation, such as used perturbative orders or heavy quark masses. Please see TheoryCard for the actual format.

The observable card defines the specific setup of the EKOs, such as the target scales or the interpolation grid. Please see OperatorCard for the actual format.

The runcard objects are independent objects, but they can be parsed from a dict and, as usual, a dict can be described, e.g., by a yaml file.

Output

We output tar-compressed folder, which contains the used settings and the actual EKO. To access the file you should use the interface provided by the EKO class and you can follow the tutorial to see how.

Each EKO is a rank-4 tensor with the indices ordered in the following way: EKO[pid_out][x_out][pid_in][x_in] where pid_out and x_out refer to the PID and the grid point of the outgoing PDF and pid_in and x_in to the incoming PDF.