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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.

Project description

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.

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