Big corrections from a little Higgs
By Csaba Csáki, J. Hubisz, G. Kribs, Patrick Meade, J. Terning. 2002
227 citations recorded by the source corpus.
We calculate the tree-level expressions for the electroweak precision observables in the SU(5)/SO(5) littlest Higgs model. The source for these corrections are the exchange of heavy gauge bosons, explicit corrections due to non-linear sigma-model dynamics and a triplet Higgs VEV. Weak isospin violating contributions are present because there is no custodial SU(2) global symmetry. The bulk of these weak isospin violating corrections arise from heavy gauge boson exchange while a smaller contribution comes from the triplet Higgs VEV. A global fit is performed to the experimental data and we find that throughout the parameter space the symmetry breaking scale is bounded by f > 4 TeV at 95% C.L. Stronger bounds on f are found for generic choices of the high energy gauge couplings. We find that even in the best case scenario one would need fine tuning of less than a percent to get a Higgs mass as light as 200 GeV.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/ad6d8cc9588e3ae80a53d1d8d152592e106ed080
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Astronomy and Astrophysics
- I. Low
- M. Schmaltz
- Hsin-Chia Cheng
- David Tucker-Smith
- T. Hambye
- Konstantin T. Matchev
- Kyoungchul Kong
- Cms Collaboration
In Nuclear and High Energy Physics
- I. Low
- David Tucker-Smith
- M. Schmaltz
- Hsin-Chia Cheng
- Frank Petriello
- T. Rizzo
- J. Hewett
- Atlas Collaboration
Citations in the corpus
- Constraining the littlest Higgs (2002, background): “Note added: a related work [20], which studied the effects of mixing in the gauge sector in the Littlest Higgs model, appeared while this paper was being completed.”
- Strong dynamics and electroweak symmetry breaking (2002, unknown): “t present. For a critical discussion of this scheme see K. Lane [533]. Two recent works attack several aspects of the models from the perspective of consistency with electroweak radiative corrections [534]. The models contain ingredients, such as I= 0 PNGB’s, that develop tadpole VEV’s and may viola”
- Little hierarchy, little higgses, and a little symmetry (2004, methodology): “The electroweak observables also receive contributions from the new TeV particles in little Higgs theories, and there have been several studies on this issue for various little Higgs models [19, 20, 21, 22, 23, 24, 25, 26, 27].”
- T parity and the littlest Higgs (2004, background): “There are many variants of the little Higgs models [13, 14, 15, 16, 17, 18], as well as some examples of UV extensions above 10 TeV [19, 20], and extensive phenomenological studies have been performed [21, 22, 23, 24, 25, 26, 27, 28, 29].”