TeV Higgsino Interpretation of the LZ High-Recoil Event with Intermediate-Scale Electroweak Gauginos
Abstract
The high-recoil event reported by LUX--ZEPLIN motivates a TeV Higgsino with a sub-MeV neutral-state splitting. Away from cancellations, such a small gap in the MSSM points to electroweak-gaugino masses of order 107 GeV, far above the Higgsino mass. We show that the non-universal boundary condition M1G/M2G=−3/5 at the SU(5) GUT scale cancels the leading bino and wino contributions and is preserved by homogeneous one-loop evolution down to the Higgsino scale. The remaining finite-gaugino terms admit a controlled tree-level solution with a wino mass near 120TeV for a 350keV gap, a 1.091TeV Higgsino and tanβ=10. We identify mixed SU(5) representations that realize the required gaugino ratio and examine the radiative sensitivity and spectrum consistency of this construction. Because the inelastic Z coupling remains essentially unsuppressed, a full-density thermal Higgsino is still subject to the published solar-capture bounds under their astrophysical and transport assumptions.
Related
- Higgsino Dark Matter Interpretation of the LZ High-Recoil Event in the GNMSSM with TeV-Scale Gauginos
- Higgsino Dark Matter Interpretation of the LUX-ZEPLIN 248 keV Nuclear-Recoil Event
- Heavy Higgsino Dark Matter With Low Reheating in View of the LZ High-Recoil Event
- TeV Higgsino Dark Matter from LZ Nuclear Recoil to Fermi-LAT Gamma Rays
- Interpreting the High-Recoil LUX-ZEPLIN Event with Bino-/Singlino-like and Higgsino Dark Matter
BibTeX
@misc{du2026higgsino,
title = {{TeV Higgsino Interpretation of the LZ High-Recoil Event with Intermediate-Scale Electroweak Gauginos}},
author = {Xiaokang Du and Fei Wang},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.04163},
eprint = {2609.04163},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.04163},
}
RIS
TY - UNPB
TI - TeV Higgsino Interpretation of the LZ High-Recoil Event with Intermediate-Scale Electroweak Gauginos
AU - Xiaokang Du
AU - Fei Wang
PY - 2026
DA - 2026/09/03
PB - arXiv
DO - 10.48550/arxiv.2609.04163
UR - https://arxiv.org/abs/2609.04163
AB - The high-recoil event reported by LUX--ZEPLIN motivates a TeV Higgsino with a sub-MeV neutral-state splitting. Away from cancellations, such a small gap in the MSSM points to electroweak-gaugino masses of order 10^7 GeV, far above the Higgsino mass. We show that the non-universal boundary condition M_1^G/M_2^G=−3/5 at the SU(5) GUT scale cancels the leading bino and wino contributions and is preserved by homogeneous one-loop evolution down to the Higgsino scale. The remaining finite-gaugino terms admit a controlled tree-level solution with a wino mass near 120TeV for a 350keV gap, a 1.091TeV Higgsino and tanβ=10. We identify mixed SU(5) representations that realize the required gaugino ratio and examine the radiative sensitivity and spectrum consistency of this construction. Because the inelastic Z coupling remains essentially unsuppressed, a full-density thermal Higgsino is still subject to the published solar-capture bounds under their astrophysical and transport assumptions.
ER -