Minimal Universal Extra Dimensions in CalcHEP/CompHEP

TL;DR

This paper provides a comprehensive implementation of the minimal universal extra dimensions model in CalcHEP/CompHEP, including detailed particle spectra, interactions, and running couplings, enabling automated calculations for research.

Contribution

The authors developed and validated a detailed, publicly available implementation of MUED in CalcHEP/CompHEP, covering all relevant particles and interactions with one-loop mass calculations.

Findings

Implementation includes all level-1 and level-2 KK particles outside the Higgs sector.

Mass spectrum is calculated at one loop based on two input parameters.

Extensive cross-checks ensure accuracy against analytical and numerical results.

Abstract

We present an implementation of the model of minimal universal extra dimensions (MUED) in CalcHEP/CompHEP. We include all level-1 and level-2 Kaluza-Klein (KK) particles outside the Higgs sector. The mass spectrum is automatically calculated at one loop in terms of the two input parameters in MUED: the radius of the extra dimension and the cut-off scale of the model. We implement both the KK number conserving and the KK number violating interactions of the KK particles. We also account for the proper running of the gauge coupling constants above the electroweak scale. The implementation has been extensively cross-checked against known analytical results in the literature and numerical results from other programs. Our files are publicly available and can be used to perform various automated calculations within the MUED model.