tparton 0.2.1

Evolution of the transversity parton distribution functions via two methods: (1) direct integration of the DGLAP equations along the energy scale and (2) fast Mellin inversion.

tParton

Copyright 2024 Congzhou M Sha

This is an evolution code for the transversity parton distribution functions encountered in hadronic physics.

Installation

First, install this package using pip install tparton.

Running tParton as a standalone script

To evolve a transversity pdf, run the command python -m tparton m. This uses the Mellin moment by default. To use the energy scale integration method, run the command python -m tparton t. Use python -m tparton m -h or python -m tparton t -h for help.

An example run will look like:

python -m tparton m INPUTPDF.dat 3.1 10.6 --morp plus -o OUTPUTPDF.dat

We are evolving the INPUTPDF.dat from 3.1 to 10.6 GeV², for the plus type distribution, and with output written to OUTPUTPDF.dat.

Importing the tParton package

To use the Hirai ODE integration method: from tparton.t_evolution import evolve

To use the Vogelsang Mellon moment method: from tparton.m_evolution import evolve

Run help(evolve) for a description of the inputs.