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PreprintCC BY 4.0arXiv

Can Elastic Neutrino Scattering Account for the LZ230616 Event?

  • Ayan Chattaraj1
  • Anirban Majumdar1,2
  • Dimitrios K. Papoulias1,2
  • Rahul Srivastava1
  1. 1Department of Physics , Indian Institute of Science Education and Research -Bhopal , Bhopal Bypass Road , Bhauri , Bhopal 462066 , India
  2. 2Institute of Experimental Physics , University of Hamburg , 22761 , Hamburg , Germany
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Abstract

Recently, the LUX-ZEPLIN (LZ) Collaboration reported an isolated nuclear-recoil event at 248± 23stat± 23syst keVnr, in a region where the expected background is very small and conventional elastic dark matter (DM)-nucleus scattering cannot readily account for such a localized feature. We investigate whether LZ230616 could instead originate from coherent elastic neutrino-nucleus scattering (CEνNS). We consider neutrino-nucleus interactions within and beyond the Standard Model, together with exotic neutrino fluxes from DM annihilation (χχ→ νν̅) or decay (χ→ νν̅) into neutrino pairs and from primordial black hole (PBH) evaporation. We show that kinematic considerations, the accompanying low energy recoil spectrum, and existing constraints exclude a viable interpretation of LZ230616 in terms of elastic neutrino-nucleus scattering for all scenarios considered.

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Cite

BibTeXRIS
BibTeX
@misc{chattaraj2026elastic,
  title = {{Can Elastic Neutrino Scattering Account for the LZ230616 Event?}},
  author = {Ayan Chattaraj and Anirban Majumdar and Dimitrios K. Papoulias and Rahul Srivastava},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.10504},
  eprint = {2609.10504},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.10504},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Can Elastic Neutrino Scattering Account for the LZ230616 Event?
AU  - Ayan Chattaraj
AU  - Anirban Majumdar
AU  - Dimitrios K. Papoulias
AU  - Rahul Srivastava
PY  - 2026
DA  - 2026/09/09
PB  - arXiv
DO  - 10.48550/arxiv.2609.10504
UR  - https://arxiv.org/abs/2609.10504
AB  - Recently, the LUX-ZEPLIN (LZ) Collaboration reported an isolated nuclear-recoil event at 248± 23_stat± 23_syst keV_nr, in a region where the expected background is very small and conventional elastic dark matter (DM)-nucleus scattering cannot readily account for such a localized feature. We investigate whether LZ230616 could instead originate from coherent elastic neutrino-nucleus scattering (CEνNS). We consider neutrino-nucleus interactions within and beyond the Standard Model, together with exotic neutrino fluxes from DM annihilation (χχ→ νν̅) or decay (χ→ νν̅) into neutrino pairs and from primordial black hole (PBH) evaporation. We show that kinematic considerations, the accompanying low energy recoil spectrum, and existing constraints exclude a viable interpretation of LZ230616 in terms of elastic neutrino-nucleus scattering for all scenarios considered.
SN  - 2331-8422
ER  -