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https://github.com/davidmstraub/parton
A Python package for parton distributions and parton luminosities
https://github.com/davidmstraub/parton
hep high-energy-physics python
Last synced: 2 days ago
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A Python package for parton distributions and parton luminosities
- Host: GitHub
- URL: https://github.com/davidmstraub/parton
- Owner: DavidMStraub
- License: mit
- Created: 2018-11-22T12:33:42.000Z (almost 6 years ago)
- Default Branch: master
- Last Pushed: 2024-10-31T09:37:27.000Z (17 days ago)
- Last Synced: 2024-10-31T10:26:48.851Z (17 days ago)
- Topics: hep, high-energy-physics, python
- Language: Python
- Homepage:
- Size: 34.2 KB
- Stars: 7
- Watchers: 5
- Forks: 9
- Open Issues: 3
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
[](https://travis-ci.org/DavidMStraub/parton) [](https://coveralls.io/github/DavidMStraub/parton?branch=master)
# parton – a Python package for parton distributions and parton luminosities
parton is a Python package providing parton distribution functions and parton luminosities. It uses the PDF data files provided by the [LHAPDF](https://lhapdf.hepforge.org/) project. Its API is partially compatible to LHAPDF's Python API, even though only a subset of its features are implemented.
parton is written in pure Python, i.e. it runs on Linux, Mac OS, and Windows.
## Installation
To install the package without administrator privileges, run
```
python3 -m pip install parton --user
```
## Command-line interface
parton provides a command-line interface that mimicks (and is partially compatible to) LHAPDF's `lhapdf` command. In particular, it can be used to install PDF grid files. It is accessed by running the package as a script,
```
python3 -m parton
```
For instance, to install a specific PDF set, run
```
python3 -m parton update
python3 -m parton install 'CT10'
```
If you already have a directory with PDF sets (e.g. from LHAPDF), that can be used as well.
## Python usage
The API for numerically evaluating PDFs is modeled after LHAPDF's Python API:
```python
from parton import mkPDF
pdf = mkPDF('CT10', 0)
# up quark PDF at x=0.1, Q=1000 GeV
pdf.xfxQ(2, 0.1, 1000)
```
If the PDF sets are in a non-default location (on Linux, the default location is `~/.local/share/parton/`), this directory can be changed through `mkPDF`'s `pdfdir` argument.
Parton luminosities are accessed similarly through the `PLumi` class, but the factorization scale has to be fixed on instantiation,
```python
from parton import PLumi
# pdf has been defined above
plumi = PLumi(pdf, Q2=1000)
# u-ubar parton luminosity at shat/s=0.1
plumi.L(2, -2, 0.1)
```
## License
parton is released under the MIT license.
## Contributors
parton was originally written by David M. Straub (@DavidMStraub)
Other contributors:
- Peter Stangl (@peterstangl)
## Citation info
parton cannot be cited at present. Please do not forget to also acknowledge the [LHAPDF](https://lhapdf.hepforge.org/) project.