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PreprintCC BY 4.0arXiv

Environment-dependent mass splitting to suppress solar capture in the inelastic-doublet interpretation of the LZ event

  • Sudhakantha Girmohanta
  • Tae Hyun Jung
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Abstract

The inelastic electroweak-doublet interpretation of the 248 keV recoil energy event reported by LUX-ZEPLIN faces strong constraints from solar capture. We propose an environment-dependent mass splitting generated by an ultralight scalar coupled quadratically to electrons. Its density-induced expectation value enhances the splitting in the Sun while preserving the laboratory value, providing a mechanism to suppress solar capture. We derive conditions for this mechanism and examine constraints from stellar cooling and electron-mass variations. We find that this scenario is phenomenologically viable, while it suffers from severe fine-tuning of the scalar potential.

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Cite

BibTeXRIS
BibTeX
@misc{girmohanta2026environmentdependent,
  title = {{Environment-dependent mass splitting to suppress solar capture in the inelastic-doublet interpretation of the LZ event}},
  author = {Sudhakantha Girmohanta and Tae Hyun Jung},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.28129},
  eprint = {2609.28129},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.28129},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Environment-dependent mass splitting to suppress solar capture in the inelastic-doublet interpretation of the LZ event
AU  - Sudhakantha Girmohanta
AU  - Tae Hyun Jung
PY  - 2026
DA  - 2026/09/23
PB  - arXiv
DO  - 10.48550/arxiv.2609.28129
UR  - https://arxiv.org/abs/2609.28129
AB  - The inelastic electroweak-doublet interpretation of the 248 keV recoil energy event reported by LUX-ZEPLIN faces strong constraints from solar capture. We propose an environment-dependent mass splitting generated by an ultralight scalar coupled quadratically to electrons. Its density-induced expectation value enhances the splitting in the Sun while preserving the laboratory value, providing a mechanism to suppress solar capture. We derive conditions for this mechanism and examine constraints from stellar cooling and electron-mass variations. We find that this scenario is phenomenologically viable, while it suffers from severe fine-tuning of the scalar potential.
ER  -