Sub-TeV Singlino Dark Matter in light from Sagittarius A∗ and LUX-ZEPLIN Nuclear-Recoil Event
4 affiliations
- 1School of Physical Sciences , Indian Association for the Cultivation of Science , Jadavpur , Kolkata , 700 032 , India
- 2Homi Bhabha National Institute , Training School Complex , Anushakti Nagar , Mumbai 400 094 , India
- 3Institute of Physics , Sachivalaya Marg , Bhubaneswar , 751 005 , India
- 4Department of Physics , Acharya Institute of Technology , Bengaluru , 560 107 , Karnataka , India
Abstract
We investigate the impact of a dark matter density spike surrounding the Milky Way's supermassive black hole (SMBH) on the detectability of Singlino-dominated neutralino dark matter within the Next-to-Minimal Supersymmetric Standard Model (NMSSM). Similar density enhancements, or mini-spikes, around stellar-mass black holes (sBHs), have also been considered. Such a dark matter (DM) candidate typically produces weak indirect detection signals in conventional dark matter halos. Additionally, a Singlino-like lightest supersymmetric particle (LSP) is very difficult to probe at the LHC or through direct DM searches. Furthermore, a Singlino-like LSP with an almost degenerate Higgsino NLSP can produce an observable inelastic DD signal and is compatible with the anomalous high-recoil event recently reported by the LZ collaboration. Keeping these in consideration, we examine the prospects for detecting these sub-TeV dark matter scenarios through gamma-ray observations of the regions surrounding the SMBH Sgr A∗ and the sBH in the low-mass X-ray binary XTE J1118+480.
Related
- Interpreting the High-Recoil LUX-ZEPLIN Event with Bino-/Singlino-like and Higgsino Dark Matter
- 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
- A Vector-Like Lepton Interpretation of the High-Energy Nuclear Recoil Candidate in LUX-ZEPLIN
- Inelastic Dark Photon Dark Matter for the LUX-ZEPLIN High-Recoil Event and the Galactic Halo Gamma-Ray Excess
BibTeX
@misc{chattopadhyay2026subtev,
title = {{Sub-TeV Singlino Dark Matter in light from Sagittarius A$^\ast$ and LUX-ZEPLIN Nuclear-Recoil Event}},
author = {Utpal Chattopadhyay and Debottam Das and Rahul Puri and Joydeep Roy},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.02994},
eprint = {2609.02994},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.02994},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Sub-TeV Singlino Dark Matter in light from Sagittarius A^∗ and LUX-ZEPLIN Nuclear-Recoil Event
AU - Utpal Chattopadhyay
AU - Debottam Das
AU - Rahul Puri
AU - Joydeep Roy
PY - 2026
DA - 2026/09/02
PB - arXiv
DO - 10.48550/arxiv.2609.02994
UR - https://arxiv.org/abs/2609.02994
AB - We investigate the impact of a dark matter density spike surrounding the Milky Way's supermassive black hole (SMBH) on the detectability of Singlino-dominated neutralino dark matter within the Next-to-Minimal Supersymmetric Standard Model (NMSSM). Similar density enhancements, or mini-spikes, around stellar-mass black holes (sBHs), have also been considered. Such a dark matter (DM) candidate typically produces weak indirect detection signals in conventional dark matter halos. Additionally, a Singlino-like lightest supersymmetric particle (LSP) is very difficult to probe at the LHC or through direct DM searches. Furthermore, a Singlino-like LSP with an almost degenerate Higgsino NLSP can produce an observable inelastic DD signal and is compatible with the anomalous high-recoil event recently reported by the LZ collaboration. Keeping these in consideration, we examine the prospects for detecting these sub-TeV dark matter scenarios through gamma-ray observations of the regions surrounding the SMBH Sgr A^∗ and the sBH in the low-mass X-ray binary XTE J1118+480.
SN - 2331-8422
ER -