utils.integrands.madgraph module

class CrossSection(*args, **kwargs)[source]

Bases: utils.integrands.abstract.Integrand

The matrix-element generated by the Fortran-output of MadGraph5_aMC@NLO

Parameters

  • e_cm (float or torch.Tensor) – Centre-of-mass energy of a central two-body collision.

  • pdf (boolean) – If True, the beams are assuemed to be proton beams and the PDFs are included in the calculation.

  • delr_cut (float or torch.Tensor) – The minimum angular distance between each pair of the outgoing particles.

  • pt_cut (float or torch.Tensor) – The minimal transversal momentum of each outgoing particle.

  • rap_maxcut (float or torch.Tensor) – The maximal rapidity of each outgoing particle. -1 means no cut.

  • pdf_type (String) – The name of the PDF set to be used by LHAPDF.

  • pdf_dir (String) – The directory whre the PDF data sets are stored.

  • lhapdf_dir (String) – The path to the LHAPDF shared-object file.

  • process (String) – The name given by MadGraph5_aMC@NLO to the subprocess.

  • device (torch.device) – Default device where the parameters are stored

evaluate_integrand(x)[source]

Compute the value of the integrand on a batch of points