https://github.com/davidmstraub/rundec-python

Python wrapper around CRunDec
https://github.com/davidmstraub/rundec-python

hep high-energy-physics particle-physics qcd

Last synced: 2 days ago
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Python wrapper around CRunDec

• Host: GitHub
• URL: https://github.com/davidmstraub/rundec-python
• Owner: DavidMStraub
• License: mit
• Created: 2017-11-28T14:19:50.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2024-09-03T21:31:00.000Z (2 months ago)
• Last Synced: 2024-09-15T16:12:31.347Z (2 months ago)
• Topics: hep, high-energy-physics, particle-physics, qcd
• Language: C++
• Size: 271 KB
• Stars: 4
• Watchers: 5
• Forks: 5
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# rundec-python

`CRunDec` is "a C++ program for the running and decoupling of the strong coupling constant and quark masses", developed by Florian Herren and Matthias Steinhauser. Relevant references:

- "Version 3 of RunDec and CRunDec",

Florian Herren, Matthias Steinhauser

[arXiv:1703.03751](https://arxiv.org/abs/1703.03751)

- "CRunDec: a C++ package for running and decoupling of the strong coupling and quark masses",

Barbara Schmidt, Matthias Steinhauser

[arXiv:1201.6149](https://arxiv.org/abs/1201.6149)

- "RunDec: A Mathematica package for running and decoupling of the strong coupling and quark masses",

K.G. Chetyrkin, Johann H. Kühn, M. Steinhauser

[arXiv:hep-ph/0004189](https://arxiv.org/abs/hep-ph/0004189)

[Source code of CRunDec 3.1](https://www.ttp.kit.edu/preprints/2017/ttp17-011)

`rundec-python` is a Python package providing a thin wrapper around `CRunDec`.

## Installation

```bash

pip install rundec

```

## Usage

The API is analogous to `CRunDec`, see [the documentation](https://arxiv.org/abs/1703.03751).

```python

import rundec

crd = rundec.CRunDec()

# compute alpha_s at the b quark mass scale with 3-loop accuracy

crd.AlphasExact(0.1185, 91.1876, 4.18, 5, 3)

# compute the b quark pole mass using the 4-loop conversion from the MSbar mass without charm mass effects

crd.mMS2mOS(4.18, None,  0.26, 4.18, 5, 4)

# compute the b quark pole mass using the 4-loop conversion from the MSbar mass with finite charm mass effects

mq = rundec.RunDecPairArray(4)

mcMS = rundec.RunDecPair()

mcMS.first  = 0.993

mcMS.second = 3.

mq[0] = mcMS

crd.mMS2mOS(4.18, mq,  0.26, 4.18, 5, 4)

# compute the b quark kinetic mass using the 3-loop conversion from the MSbar mass

mcMS = rundec.RunDecPair()

mcMS.first  = 0.993

mcMS.second = 3.

crd.mMS2mKIN(4.163, mcMS,  0.225, 4.163, 1, 3, 1)

```

## Technical details

The wrapper was generated with [SWIG](http://www.swig.org/).

Binary wheels are provided via [PyPI](https://pypi.python.org/pypi/rundec) for Linux, macOS, and Windows (built with [GitHub Actions](https://github.com/features/actions)).

The Windows wheels require Python 3.5+, on Linux and macOS Python 2.7+ is sufficient.