RunningCoupling

class RunningCoupling : public madspace::FunctionGenerator

Strong-coupling interpolation as a compute-graph function.

Interpolates an AlphaSGrid to return \(\alpha_s(q)\) at the sampled scale (Sec. 3.2.3 of [1]).

batch is the leading batch dimension.

Arguments

• q – float, shape (batch,) – renormalization scale.

Returns

• alpha_s – float, shape (batch,) – the interpolated \(\alpha_s(q)\).

References

• [1] T. Heimel, O. Mattelaer, R. Winterhalder, “MadSpace”, https://arxiv.org/abs/2602.06895 (Sec. 3.2.3)

Public Functions

RunningCoupling(const AlphaSGrid &grid, const std::string &prefix = "")

Parameters:

• grid – The alpha_s grid to interpolate.

• prefix – Prefix for the grid global names.