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Prospects for detecting charged long-lived BSM particles at MoEDAL-MAPP experiment: A mini-review

Rafał Masełek, Kazuki Sakurai

TL;DR

This work assesses the prospects for detecting electrically charged long-lived beyond-Standard-Model particles with the MoEDAL-MAPP experiment. Using a fast MoEDAL-NDT simulation, it analyzes SUSY LLPs, radiative neutrino-mass states, and multiply-charged scenarios, comparing MoEDAL's reach to ATLAS and CMS and incorporating Run-3 geometry optimizations and photon-fusion production. The results show MoEDAL's strength in slow-moving and intermediate-charge regimes, offering background-free, complementary constraints even with lower luminosity, and demonstrate how detector geometry and production channels influence sensitivity. Overall, MoEDAL-MAPP is poised to provide independent, competitive coverage at the HL-LHC, especially for signatures that are challenging for prompt-trigger detectors.

Abstract

The search for physics beyond the Standard Model at the Large Hadron Collider is expanding to include unconventional signatures such as long-lived particles. This mini-review assesses the prospects for detecting electrically charged long-lived particles using the MoEDAL-MAPP experiment. We synthesize findings from recent studies that evaluate sensitivity to supersymmetric models, radiative neutrino mass scenarios, and generic multiply charged objects. A key component of this review is the comparative analysis of MoEDAL's reach against the general-purpose ATLAS and CMS experiments. We conclude that while MoEDAL is constrained by lower integrated luminosity, its passive, background-free detection methodology offers a unique advantage. Specifically, the experiment provides complementarity to the major detectors, particularly for signals involving slow-moving particles and stable states with intermediate electric charges.

Prospects for detecting charged long-lived BSM particles at MoEDAL-MAPP experiment: A mini-review

TL;DR

This work assesses the prospects for detecting electrically charged long-lived beyond-Standard-Model particles with the MoEDAL-MAPP experiment. Using a fast MoEDAL-NDT simulation, it analyzes SUSY LLPs, radiative neutrino-mass states, and multiply-charged scenarios, comparing MoEDAL's reach to ATLAS and CMS and incorporating Run-3 geometry optimizations and photon-fusion production. The results show MoEDAL's strength in slow-moving and intermediate-charge regimes, offering background-free, complementary constraints even with lower luminosity, and demonstrate how detector geometry and production channels influence sensitivity. Overall, MoEDAL-MAPP is poised to provide independent, competitive coverage at the HL-LHC, especially for signatures that are challenging for prompt-trigger detectors.

Abstract

The search for physics beyond the Standard Model at the Large Hadron Collider is expanding to include unconventional signatures such as long-lived particles. This mini-review assesses the prospects for detecting electrically charged long-lived particles using the MoEDAL-MAPP experiment. We synthesize findings from recent studies that evaluate sensitivity to supersymmetric models, radiative neutrino mass scenarios, and generic multiply charged objects. A key component of this review is the comparative analysis of MoEDAL's reach against the general-purpose ATLAS and CMS experiments. We conclude that while MoEDAL is constrained by lower integrated luminosity, its passive, background-free detection methodology offers a unique advantage. Specifically, the experiment provides complementarity to the major detectors, particularly for signals involving slow-moving particles and stable states with intermediate electric charges.
Paper Structure (9 sections, 7 equations, 4 figures, 4 tables)

This paper contains 9 sections, 7 equations, 4 figures, 4 tables.

Table of Contents

  1. Introduction
  2. MoEDAL-MAPP experiment
  3. Methodology of phenomenological studies
  4. Future discovery prospects
  5. Proof-of-concept: neutralinos decaying to meta-stable staus
  6. Searches for supersymmetric long-lived particles
  7. Testing radiative neutrino mass models
  8. Searches for multiply charged BSM particles
  9. Conclusions

Figures (4)

  • Figure 1: Nuclear Track Detector panel placement for the MoEDAL Run 2 geometry. Image taken from Maselek:2023fvy.
  • Figure 2: Velocity distributions for 1 TeV staus, Higgsinos, and gluinos produced via Drell-Yan process. Plot taken from Felea:2020cvf.
  • Figure 3: Expected sensitivity of the MoEDAL experiment to supersymmetric model. Red and blue contours correspond to Run 2 and "ideal" MoEDAL geometries, respectively. Solid line marks contours for $\rm N_{sig}=1$, while dashed lines are for $\rm N_{sig}=2$. The yellow contour shows constraints from ATLAS search for HSCPs ATLAS:2019gqq, done for $L=36.1~{\rm fb}^{-1}$. The orange contour is ATLAS constraint projected for the end of the Run 3 data taking period, $L=300~{\rm fb}^{-1}$. Plot taken from Felea:2020cvf.
  • Figure 4: Expected sensitivity of LHC searches for multiply charged long-lived particles at the end of HL-LHC. Results are for colour-singlet scalars (top left), colour-singlet fermions (top right), colour-triplet scalars (bottom left), and colour-triplet fermions (bottom right). Figure taken from Altakach:2022hgn.