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We introduce a class of chiral \(U(1)_X\) symmetries where all Standard Model fermions are chiral. Anomaly cancellation is achieved by adding three SM-singlet dark fermions whose charges are fixed by these conditions. We explore chiral solutions where (a) one, (b) two, or (c) all three SM generations charged under \(U(1)_X\) . These fermions belong to the dark sector, and light among them n is a viable dark matter candidate. We call this symmetry “Dark HyperCharge,” as the new \(Z'\) boson mediates interactions between dark and visible sectors. Using a benchmark model, we examine phenomenology for a heavy \(Z'\) ( \(M_{Z'} > M_Z\) ), including collider constraints and the dark fermion’s dark matter properties, satisfying current experimental bounds across a broad mass range.

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Exploring Novel Dark Hypercharge Symmetry

  • 会议论文

  • 发表日期：

    2025年

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  • Hemant Prajapati,
  • Rahul Srivastava

摘要

We introduce a class of chiral \(U(1)_X\) symmetries where all Standard Model fermions are chiral. Anomaly cancellation is achieved by adding three SM-singlet dark fermions whose charges are fixed by these conditions. We explore chiral solutions where (a) one, (b) two, or (c) all three SM generations charged under \(U(1)_X\) . These fermions belong to the dark sector, and light among them n is a viable dark matter candidate. We call this symmetry “Dark HyperCharge,” as the new \(Z'\) boson mediates interactions between dark and visible sectors. Using a benchmark model, we examine phenomenology for a heavy \(Z'\) ( \(M_{Z'} > M_Z\) ), including collider constraints and the dark fermion’s dark matter properties, satisfying current experimental bounds across a broad mass range.