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PreprintCC BY 4.0arXiv

Inelastic B−L scalar dark matter and the LUX-ZEPLIN event

  • Nobuchika Okada1
  • Osamu Seto2
  1. 1Department of Physics and Astronomy , University of Alabama , Tuscaloosa , Alabama 35487 , USA
  2. 2Department of Physics , Hokkaido University , Sapporo 060-0810 , Japan
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Abstract

We show that our previously proposed inelastic scalar dark matter (DM) model in gauged U(1)B−L symmetry naturally accounts for the 2.6σ high-energy recoil event recently reported by the LUX-ZEPLIN (LZ) collaboration. To satisfy the thermal relic abundance, TeV-scale scalar DM S with mS ≃ mZ'/2 for resonant annihilation and the gauge coupling constant gB−L ∼ 0.5 are required, where mZ′ is the mass of U(1)B−L gauge boson Z′. The resulting predicted DM-nucleon inelastic cross section of σSI ∼ 10−45 cm2 is in excellent agreement with the LZ event. This scenario can be decisively tested for future collider searches for Z′ boson resonance.

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Cite

BibTeXRIS
BibTeX
@misc{okada2026inelastic,
  title = {{Inelastic $B-L$ scalar dark matter and the LUX-ZEPLIN event}},
  author = {Nobuchika Okada and Osamu Seto},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.06909},
  eprint = {2609.06909},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.06909},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Inelastic B−L scalar dark matter and the LUX-ZEPLIN event
AU  - Nobuchika Okada
AU  - Osamu Seto
PY  - 2026
DA  - 2026/09/07
PB  - arXiv
DO  - 10.48550/arxiv.2609.06909
UR  - https://arxiv.org/abs/2609.06909
AB  - We show that our previously proposed inelastic scalar dark matter (DM) model in gauged U(1)_B−L symmetry naturally accounts for the 2.6σ high-energy recoil event recently reported by the LUX-ZEPLIN (LZ) collaboration. To satisfy the thermal relic abundance, TeV-scale scalar DM S with m_S ≃ m_Z'/2 for resonant annihilation and the gauge coupling constant g_B−L ∼ 0.5 are required, where m_Z^′ is the mass of U(1)_B−L gauge boson Z^′. The resulting predicted DM-nucleon inelastic cross section of σ_SI ∼ 10^−45 cm^2 is in excellent agreement with the LZ event. This scenario can be decisively tested for future collider searches for Z^′ boson resonance.
SN  - 2331-8422
ER  -