# Probing New Gauge Forces with a High-Energy Muon Beam Dump

**Authors:** Cari Cesarotti, Samuel Homiller, Rashmish K. Mishra, Matthew Reece  
**arXiv:** [2202.12302](https://arxiv.org/abs/2202.12302)  
**Date:** 2022-02-24  
**Summary page:** https://www.summarizepaper.com/en/arxiv-id/2202.12302v1/

## Key points

- Proposal of a new beam dump experiment at a future TeV-scale muon collider
- Beam dump as a cost-effective and efficient method to enhance the discovery potential of the collider complex
- Focus on vector models such as dark photon and $L_\mu-L_\tau$ gauge boson for new physics
- Investigation of parameter space and sensitivity analysis for these models
- Increased sensitivity in the moderate mass range (MeV - GeV) for dark photon model compared to existing experiments
- Exploration of previously uncharted areas of parameter space with higher and lower couplings
- Access to novel regions of parameter space for $L_\mu-L_\tau$ model
- Opportunity to expand knowledge of new gauge forces using high-energy muon beam dump at future TeV-scale muon collider
- Potential for increased sensitivity in both dark photon and $L_\mu-L_\tau$ models, leading to groundbreaking discoveries in particle physics research.

## Summary

In their study, Cari Cesarotti, Samuel Homiller, Rashmish K. Mishra, and Matthew Reece propose a new beam dump experiment at a future TeV-scale muon collider. The authors argue that a beam dump would be a cost-effective and efficient method to enhance the discovery potential of the collider complex in a complementary regime. The researchers focus on vector models such as the dark photon and $L_\mu-L_\tau$ gauge boson as potential candidates for new physics. They investigate the regions of parameter space that can be explored with a muon beam dump and analyze the sensitivity of these models. For the dark photon model, they find that the proposed muon beam dump experiment offers increased sensitivity in the moderate mass range (MeV - GeV) compared to existing and planned experiments. This includes both higher and lower couplings, allowing for exploration of previously uncharted areas of parameter space. Moreover, the authors highlight that their proposed experiment also provides access to novel regions of parameter space for the $L_\mu-L_\tau$ model. This suggests that a muon beam dump could significantly contribute to our understanding of this particular gauge boson model. Overall, this study presents an opportunity to expand our knowledge of new gauge forces by utilizing a high-energy muon beam dump at a future TeV-scale muon collider. The authors' findings demonstrate the potential for increased sensitivity in both dark photon and $L_\mu-L_\tau$ models, opening up avenues for further exploration in these areas of particle physics research which could lead to groundbreaking discoveries about our universe.