Inelastic dark matter and baryon flavor symmetry in light of LUX-ZEPLIN (LZ) experiment
- 1Department of Physics , Chung-Ang University , Seoul 06974 , Korea
- 2Theoretical Physics Department , CERN , 1211 Geneva , Switzerland
Abstract
We present a novel model for inelastic dark matter in a simple extension of the Standard Model (SM) with a local U(1)' baryon flavor symmetry, such as U(1)Bi−Bj with i≠ j. In this framework, we realize a realistic flavor structure for the mixing Yukawa couplings due to higher dimensional operators or renormalizable couplings between the SM quarks and extra vector-like quarks that are anomaly-free by themselves. We regard a Dirac singlet fermion as being dark matter and obtaining a small mass splitting for inelastic dark matter, only after the U(1)' symmetry is broken spontaneously. We show that there is a consistent parameter space for explaining both the LZ nuclear recoil event and the correct relic density for dark matter and the existing collider and indirect detection bounds are satisfied at the same time. In this case, we predict a relatively light Z' boson with 10−20 GeV mass and a weak gauge coupling, suggesting a dedicated search at colliders. The future data with higher recoil energies at direct detection experiments will play a decisive role of discriminating between the scenarios of light and heavy dark matter.
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BibTeX
@misc{lee2026inelastic,
title = {{Inelastic dark matter and baryon flavor symmetry in light of LUX-ZEPLIN (LZ) experiment}},
author = {Hyun Min Lee},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.06171},
eprint = {2609.06171},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.06171},
note = {CC BY-NC-SA 4.0},
}
RIS
TY - UNPB
TI - Inelastic dark matter and baryon flavor symmetry in light of LUX-ZEPLIN (LZ) experiment
AU - Hyun Min Lee
PY - 2026
DA - 2026/09/05
PB - arXiv
DO - 10.48550/arxiv.2609.06171
UR - https://arxiv.org/abs/2609.06171
AB - We present a novel model for inelastic dark matter in a simple extension of the Standard Model (SM) with a local U(1)' baryon flavor symmetry, such as U(1)_B_i−B_j with i≠ j. In this framework, we realize a realistic flavor structure for the mixing Yukawa couplings due to higher dimensional operators or renormalizable couplings between the SM quarks and extra vector-like quarks that are anomaly-free by themselves. We regard a Dirac singlet fermion as being dark matter and obtaining a small mass splitting for inelastic dark matter, only after the U(1)' symmetry is broken spontaneously. We show that there is a consistent parameter space for explaining both the LZ nuclear recoil event and the correct relic density for dark matter and the existing collider and indirect detection bounds are satisfied at the same time. In this case, we predict a relatively light Z' boson with 10−20 GeV mass and a weak gauge coupling, suggesting a dedicated search at colliders. The future data with higher recoil energies at direct detection experiments will play a decisive role of discriminating between the scenarios of light and heavy dark matter.
SN - 2331-8422
ER -