TeV Higgsino Dark Matter from LZ Nuclear Recoil to Fermi-LAT Gamma Rays
- 1Department of Physics and Institute of Theoretical Physics , Nanjing Normal University , Nanjing , 210023 , China
- 2Center for Theoretical Physics , Henan Normal University , Xinxiang 453007 , China
- 3School of Physics , Yantai University , Yantai 264005 , China
Abstract
The excess of high-energy nuclear recoils, which was recently reported by the LUX-ZEPLIN (LZ) experiment, together with the Fermi-LAT Galactic-Center preference, suggests new physics beyond the standard model (SM). One of the minimal extensions of the SM is to introduce a fermionic electroweak doublet in which the lightest neutral component can play the role of a stable dark matter particle. We show that the minimal higgsino dark matter can offer a common origin for both excesses. The inferred mass splitting, however, depends on the local dark matter velocity distribution, and including the high-velocity tail generated by the gravitational influence of the Large Magellanic Cloud yields δm =481--519 keV for mχ=1000--1183 GeV at 1σ level. Near elastic-scattering blind spots, solar-captured higgsinos fail to reach thermal equilibrium, weakening their annihilation signal, so that ten years of IceCube data exclude δm ≲ 475 keV at 90% C.L. The viable parameter space can be tested through the associated gamma-ray line, which is within the projected reach of CTAO.
Related
- Higgsino Dark Matter Interpretation of the LUX-ZEPLIN 248 keV Nuclear-Recoil Event
- Higgsino dark matter compatible with the LUX-ZEPLIN high-energy nuclear-recoil event and IceCube constraints
- Heavy Higgsino Dark Matter With Low Reheating in View of the LZ High-Recoil Event
- Interpreting the High-Recoil LUX-ZEPLIN Event with Bino-/Singlino-like and Higgsino Dark Matter
- Higgsino Dark Matter Interpretation of the LZ High-Recoil Event in the GNMSSM with TeV-Scale Gauginos
BibTeX
@misc{wu2026higgsino,
title = {{TeV Higgsino Dark Matter from LZ Nuclear Recoil to Fermi-LAT Gamma Rays}},
author = {Lei Wu and Yang Zhang and Bin Zhu},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.01590},
eprint = {2609.01590},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.01590},
}
RIS
TY - UNPB
TI - TeV Higgsino Dark Matter from LZ Nuclear Recoil to Fermi-LAT Gamma Rays
AU - Lei Wu
AU - Yang Zhang
AU - Bin Zhu
PY - 2026
DA - 2026/09/01
PB - arXiv
DO - 10.48550/arxiv.2609.01590
UR - https://arxiv.org/abs/2609.01590
AB - The excess of high-energy nuclear recoils, which was recently reported by the LUX-ZEPLIN (LZ) experiment, together with the Fermi-LAT Galactic-Center preference, suggests new physics beyond the standard model (SM). One of the minimal extensions of the SM is to introduce a fermionic electroweak doublet in which the lightest neutral component can play the role of a stable dark matter particle. We show that the minimal higgsino dark matter can offer a common origin for both excesses. The inferred mass splitting, however, depends on the local dark matter velocity distribution, and including the high-velocity tail generated by the gravitational influence of the Large Magellanic Cloud yields δ_m =481--519 keV for m_χ=1000--1183 GeV at 1σ level. Near elastic-scattering blind spots, solar-captured higgsinos fail to reach thermal equilibrium, weakening their annihilation signal, so that ten years of IceCube data exclude δ_m ≲ 475 keV at 90% C.L. The viable parameter space can be tested through the associated gamma-ray line, which is within the projected reach of CTAO.
SN - 2331-8422
ER -