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24 April 2024 |
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Colorless Top Partners, a 125 GeV Higgs, and the Limits on Naturalness | | Gustavo Burdman
; Zackaria Chacko
; Roni Harnik
; Leonardo de Lima
; Christopher B. Verhaaren
; | | Date: |
12 Nov 2014 | | Abstract: | Theories of physics beyond the Standard Model that address the hierarchy
problem generally involve top partners, new particles that cancel the quadratic
divergences associated with the Yukawa coupling of the Higgs to the top quark.
With extensions of the Standard Model that involve new colored particles coming
under strain from collider searches, scenarios in which the top partners carry
no charge under the strong interactions have become increasingly compelling.
Although elusive for direct searches, these theories predict modified couplings
of the Higgs boson to the Standard Model particles. This results in corrections
to the Higgs production and decay rates that can be detected at the Large
Hadron Collider (LHC) provided the top partners are sufficiently light, and the
theory correspondingly natural. In this paper we consider three theories that
address the little hierarchy problem and involve colorless top partners,
specifically the Mirror Twin Higgs, Folded Supersymmetry, and the Quirky Little
Higgs. For each model we investigate the current and future bounds on the top
partners, and the corresponding limits on naturalness, that can be obtained
from the Higgs program at the LHC. We conclude that the LHC will not be able to
strongly disfavor naturalness, with mild tuning at the level of about one part
in ten remaining allowed even with 3000 fb$^{-1}$ of data at 14 TeV. | | Source: | arXiv, 1411.3310 | | Services: | Forum | Review | PDF | Favorites | |
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