MuonBridge

"Effective theory tower for $\mu \rightarrow e$ conversion" - [arXiv:2406.13818]

The MuonBridge repository is the top level to a software suite that, through an effective theory tower, facilitate the matching of charged-lepton-flavor-violating (CLFV) Standard Model extensions to a recently developed nonrelativistic effective theory (NRET) that describes the nuclear-level interactions of muon-to-electron conversion within the field of a nucleus¹². This allows for the theoretical prediction of conversion rates and capture ratios within arbitrary CLFV UV completions that can be compared with experimental measurements.

This repository clones three distinct sub-repositories (MuonConverter, Mu2e_NRET and Elastic), into a set of directories so that they can access scripts and data files with relative paths.

After cloning this repository, running the script setupbridge.sh will automatically obtain version compatible clones of the sub-repositories with the correct relative paths.

git clone https://github.com/Berkeley-Electroweak-Physics/MuonBridge.git
cd MuonBridge
sh setupbridge.sh

Python setup

Python>=3.9.0 and Mathematica>=13.0 is required for use.

Additional modules with sufficiently updated versions can be installed with

cd MuonBridge # if not already in the directory
pip3 install -r requirements.txt

Footnotes

1. "Nuclear-Level Effective Theory of Muon -> Electron Conversion", Evan Rule, W.C. Haxton and Kenneth McElvain, PhysRevLett. 130 131901 (2023),(https://doi.org/10.1103/PhysRevLett.130.131901) ↩

2. "Nuclear-level effective theory of Muon -> Electron Conversion: Formalism and Applications", Evan Rule, W.C. Haxton, Kenneth McElvain, and Michael J. Ramsey-Musolf, PhysRev. C 107 035504 (2023), https://doi.org/10.1103/PhysRevC.107.035504 ↩