Dispersion Relations

The dispersionrelations package bundles methods commonly used in phenomenological particle physics. Included in the package and documented below are commonly occurring constants, such as masses and decay widths, auxiliary functions used in kinematics as well as relations for the description of the dynamics of a system, ranging from simple vertex prescriptions to classes for computing dispersion relations, making use of the unitarity and the analytic structure of the S-matrix. The package was developed in the course of doctoral studies at the University of Bonn.

Authors

• George Chanturia (maintainer)
• Leon Antonius Heuser
• Miriam Penners

Content

The package is divided in the following submodules:

• The constants module includes a collection of physical and mathematical constants and related functions used throughout the package.
• The utilities module provides auxilary complex functions.
• The data module contains statistical methods.
• The kinematics module accommodates functions necessary for particle kinematics such as phase space functions, etc.
• The dynamics module houses integration vertices, particle propagators, channel definitions, etc.
• The integrals module provides numerical integration routines for dispersion integrals.

Full documentation is available at dispersionrelations.readthedocs.io.