Not so good νs for Higgsino dark matter as LZ excess: stringent limits from Super-Kamiokande and IceCube
- 1Centre for High Energy Physics , Indian Institute of Science , C. V. Raman Avenue , Bengaluru 560012 , India
- 2Department of Physics , Indian Institute of Science , C. V. Raman Avenue , Bengaluru 560012 , India
- 3Theory Division , Saha Institute of Nuclear Physics , 1/AF , Bidhannagar , Kolkata 700064 , India
Abstract
The LUX-ZEPLIN (LZ) collaboration has recently reported a single nuclear recoil event at a high recoil energy of about 250 keV. This has been interpreted as inelastic scattering of dark matter that is a supersymmetric Higgsino with a mass splitting between the neutral states of a few 100 keV. Such dark matter may be captured at high recoil in the Sun through scattering on heavy elements in it, and annihilate to W+W- and ZZ, in turn giving rise to a neutrino flux detectable on Earth. Using measurements of atmospheric electron- and muon-neutrino fluxes by Super-Kamiokande and IceCube, we constrain thermal and non-thermal Higgsino dark matter, excluding inter-state mass splittings ≲ 557 keV. This disfavors Higgsino-like interpretations of the LZ event for standard halo velocities.
Related
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BibTeX
@misc{bose2026good,
title = {{Not so good $ν$s for Higgsino dark matter as LZ excess: stringent limits from Super-Kamiokande and IceCube}},
author = {Debajit Bose and Akash Kumar Saha and Deep Jyoti Das and Rinchen Sherpa and Abhijeet Singh and Durba Ghosh and Jaya Doliya and Subhadip Bouri and Biprajit Mondal and Ranjini Mondol and Nirmal Raj and Ranjan Laha},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.07807},
eprint = {2609.07807},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.07807},
}
RIS
TY - UNPB
TI - Not so good νs for Higgsino dark matter as LZ excess: stringent limits from Super-Kamiokande and IceCube
AU - Debajit Bose
AU - Akash Kumar Saha
AU - Deep Jyoti Das
AU - Rinchen Sherpa
AU - Abhijeet Singh
AU - Durba Ghosh
AU - Jaya Doliya
AU - Subhadip Bouri
AU - Biprajit Mondal
AU - Ranjini Mondol
AU - Nirmal Raj
AU - Ranjan Laha
PY - 2026
DA - 2026/09/07
PB - arXiv
DO - 10.48550/arxiv.2609.07807
UR - https://arxiv.org/abs/2609.07807
AB - The LUX-ZEPLIN (LZ) collaboration has recently reported a single nuclear recoil event at a high recoil energy of about 250 keV. This has been interpreted as inelastic scattering of dark matter that is a supersymmetric Higgsino with a mass splitting between the neutral states of a few 100 keV. Such dark matter may be captured at high recoil in the Sun through scattering on heavy elements in it, and annihilate to W^+W^- and ZZ, in turn giving rise to a neutrino flux detectable on Earth. Using measurements of atmospheric electron- and muon-neutrino fluxes by Super-Kamiokande and IceCube, we constrain thermal and non-thermal Higgsino dark matter, excluding inter-state mass splittings ≲ 557 keV. This disfavors Higgsino-like interpretations of the LZ event for standard halo velocities.
SN - 2331-8422
ER -