2008/04/30 by Csaba Csáki, Csaba Csaki, Johannes Heinonen +2 · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Electroweak interaction #Hierarchy problem #Higgs boson #Parity (physics) #Particle physics #Particle physics theoretical and experimental studies #Physics #Symmetry breaking #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.79.035014
published as Phys.Rev.D79:035014,2009 · v1: 30 pages, 4 figures v2: minor clarifications added and typos corrected
arxiv created 2008/07/03 · openalex publication_date 2009/02/18 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We construct a weakly coupled, renormalizable ultraviolet completion of the littlest Higgs model with T parity (LHT), based on an SU(5)\ifmmode×\else\texttimes\fiSU(2)\ifmmode×\else\texttimes\fiU(1) gauge theory with a discrete Z2 symmetry. Our model reproduces the complete structure of the LHT below the 10 TeV scale, including the collective symmetry-breaking mechanism which solves the little hierarchy problem. The model is manifestly free of anomalies, including both gauge/gravitational anomalies and anomalies involving T parity. At the TeV scale, the model contains additional states not present in the LHT. We estimate the impact of these states on precision electroweak observables, and show that the model is realistic. We also discuss how our model can be embedded into a supersymmetric theory or a five-dimensional setup with a warped extra dimension, stabilizing the hierarchy between the 10 TeV and the Planck scale.