TeV symmetry and the little hierarchy problem

Hsin Chia Cheng*, Ian Low

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

453 Scopus citations


Constraints from precision electroweak measurements reveal no evidence for new physics up to 5-7TeV, whereas naturalness requires new particles at around ITeV to address the stability of the electroweak scale. We show that this "little hierarchy problem" can be cured by introducing a symmetry for new particles at the TeV scale. As an example, we construct a little Higgs model with this new symmetry, dubbed T-parity, which naturally solves the little hierarchy problem and, at the same time, stabilize the electroweak scale up to 10TeV. The model has many important phenomenological consequences, including consistency with the precision data without any fine-tuning, a stable weakly-interacting particle as the dark matter candidate, as well as collider signals completely different from existing little Higgs models, but rather similar to the supersymmetric theories with conserved R-parity.

Original languageEnglish (US)
Pages (from-to)1143-1159
Number of pages17
JournalJournal of High Energy Physics
Issue number9
StatePublished - Sep 1 2003


  • Beyond Standard Model
  • Higgs Physics

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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