Probing LZ-Motivated TeV Higgsino Dark Matter through Heavier Sparticles at LHC
Abstract
The nearly pure TeV-scale Higgsino dark matter provides a natural explanation for the high-energy nuclear-recoil excess reported by LUX-ZEPLIN. Such a heavy and compressed Higgsino spectrum makes direct searches at the LHC challenging. We therefore investigate complementary probes through the production and decay of heavier sparticles. We perform a comprehensive analysis and obtain the following observations: (i) For a TeV Higgsino, the current LHC Run-2 searches exclude gluino up to approximately 2.2~TeV, while the HL-LHC can give an exclusion reach of 2.5--2.6~TeV and a discovery reach of 2.3--2.4~TeV; (ii) The light-flavor squark coannihilation window lies beyond the Run-2 reach, but its lower end could be excluded at the HL-LHC under optimistic assumptions; (iii) The Run-2 search does not exclude the stop or sbottom benchmarks; (iv) The slepton and heavier-electroweakino productions are too small to access at the HL-LHC.
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BibTeX
@misc{wang2026probing,
title = {{Probing LZ-Motivated TeV Higgsino Dark Matter through Heavier Sparticles at LHC}},
author = {Xintian Wang and Jin Min Yang and Yuanfang Yue and Yang Zhang},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.16156},
eprint = {2610.16156},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.16156},
}
RIS
TY - UNPB
TI - Probing LZ-Motivated TeV Higgsino Dark Matter through Heavier Sparticles at LHC
AU - Xintian Wang
AU - Jin Min Yang
AU - Yuanfang Yue
AU - Yang Zhang
PY - 2026
DA - 2026/10/12
PB - arXiv
DO - 10.48550/arxiv.2610.16156
UR - https://arxiv.org/abs/2610.16156
AB - The nearly pure TeV-scale Higgsino dark matter provides a natural explanation for the high-energy nuclear-recoil excess reported by LUX-ZEPLIN. Such a heavy and compressed Higgsino spectrum makes direct searches at the LHC challenging. We therefore investigate complementary probes through the production and decay of heavier sparticles. We perform a comprehensive analysis and obtain the following observations: (i) For a TeV Higgsino, the current LHC Run-2 searches exclude gluino up to approximately 2.2~TeV, while the HL-LHC can give an exclusion reach of 2.5--2.6~TeV and a discovery reach of 2.3--2.4~TeV; (ii) The light-flavor squark coannihilation window lies beyond the Run-2 reach, but its lower end could be excluded at the HL-LHC under optimistic assumptions; (iii) The Run-2 search does not exclude the stop or sbottom benchmarks; (iv) The slepton and heavier-electroweakino productions are too small to access at the HL-LHC.
ER -