2013/01/14 by Xiao-Fang Han, Lei Wang, Jin Min Yang +1
Mathematics · Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Geography #Gluon #Higgs boson #Large Hadron Collider #Mathematics #Nuclear physics #Parameter space #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quark #Sigma #Standard Model (mathematical formulation) #Statistics #Tevatron #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.87.055004
20 pages, 7 figures, 1 table, Higgs data updated, references added
arxiv created 2013/01/14 · openalex publication_date 2013/03/05 · arxiv updated 2013/03/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We confront the little Higgs theory with the LHC Higgs search data (up to 17 fb^\ensuremath-1 of the combined 7 and 8 TeV run). Considering some typical models, namely, the littlest Higgs model, the littlest Higgs model with T parity (LHT-A and LHT-B), and the simplest little Higgs model, we scan over the parameter space in the region allowed by current experiments. We find that in these models the inclusive and exclusive (via gluon-gluon fusion) diphoton and ZZ* signal rates of the Higgs boson are always suppressed and approach the standard model predictions for a large-scale f. Thus, the ZZ* signal rate is within the 1\ensuremathσ range of the experimental data while the inclusive diphoton signal rate is always outside the 2\ensuremathσ range. Especially, in the LHT-A the diphoton signal rate is outside the 3\ensuremathσ range of the experimental data for f<800 GeV. We also perform a global \ensuremathχ2 fit to the available LHC and Tevatron Higgs data, and find that these models provide no better global fit to the whole data set (only for some special channels a better fit can be obtained, especially in the LHT-B).