Mono-Z signal for dark matter searches at future lepton colliders and cosmological interpretation
Abstract
We investigate mono-Z signature at the future electron-positron collider within the dark matter effective field theory (DMEFT) framework, considering operators up to dimension six for scalar, fermionic, and vector dark matter (DM) candidates. The operators are classified according to their underlying production mechanisms. We identify the phenomenologically viable parameter space by imposing the observed DM relic abundance together with direct and indirect detection constraints, Higgs invisible decay limits, and LHC mono-Z bounds obtained through a recasting analysis. We study the discovery prospects of the surviving DM operators at the future e-e+ collider including initial and final state radiation, detector simulation, and the reconstruction of both leptonic and hadronic Z-boson decay modes. We exploit missing energy, missing transverse momentum, recoil mass, Z-boson pseudorapidity, together with beam polarization, which play a significant role to distinguish the signal from the Standard Model background. We find that fermionic dipole, scalar leptophilic, vector Higgs-portal, and gauge-portal DM operators offer robust mono-Z discovery potential, probing multi-TeV effective scales.
Related
- Searches for electroweak singlets at future plasma wakefield colliders
- Axion-Like Particle Searches at Muon Colliders: Photon-Neutrino Signatures and Heavy-Neutral-Lepton Feasibility
- New Observables for Resonant and Non-Resonant New Physics Searches at Colliders
- From LUX-ZEPLIN to Colliders: Probing Higgsino Dark Matter
- Low-energy antinuclei measurements for background-free indirect dark matter searches and PBH signatures
BibTeX
@misc{ghosh2026monoz,
title = {{Mono-Z signal for dark matter searches at future lepton colliders and cosmological interpretation}},
author = {Anupam Ghosh and Partha Kumar Paul and Abhik Sarkar and Rituparna Ghosh and Rachit Sharma and Subhaditya Bhattacharya},
howpublished = {HAL},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.33514},
eprint = {2609.33514},
archivePrefix = {arXiv},
url = {https://hal.science/hal-05781865v1},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Mono-Z signal for dark matter searches at future lepton colliders and cosmological interpretation
AU - Anupam Ghosh
AU - Partha Kumar Paul
AU - Abhik Sarkar
AU - Rituparna Ghosh
AU - Rachit Sharma
AU - Subhaditya Bhattacharya
PY - 2026
DA - 2026/09/27
PB - HAL
DO - 10.48550/arxiv.2609.33514
UR - https://hal.science/hal-05781865v1
AB - We investigate mono-Z signature at the future electron-positron collider within the dark matter effective field theory (DMEFT) framework, considering operators up to dimension six for scalar, fermionic, and vector dark matter (DM) candidates. The operators are classified according to their underlying production mechanisms. We identify the phenomenologically viable parameter space by imposing the observed DM relic abundance together with direct and indirect detection constraints, Higgs invisible decay limits, and LHC mono-Z bounds obtained through a recasting analysis. We study the discovery prospects of the surviving DM operators at the future e^-e^+ collider including initial and final state radiation, detector simulation, and the reconstruction of both leptonic and hadronic Z-boson decay modes. We exploit missing energy, missing transverse momentum, recoil mass, Z-boson pseudorapidity, together with beam polarization, which play a significant role to distinguish the signal from the Standard Model background. We find that fermionic dipole, scalar leptophilic, vector Higgs-portal, and gauge-portal DM operators offer robust mono-Z discovery potential, probing multi-TeV effective scales.
ER -