Top-Mode Pseudos at the LHC

Abstract

We discuss LHC phenomenologies of the Top-Mode Pseudos $(h_t^0,A_t^0)$, composite pseudo Nambu--Goldstone bosons predicted in the model recently proposed in a framework of the top quark condensation. The CP-even Top-Mode Pseudo, dubbed tHiggs ($h_t^0$), is identified with the 126 GeV Higgs boson at the LHC. We analyze the coupling properties of the tHiggs in comparison with the currently available data reported from LHC Run-I to find that the tHiggs can be consistent with the LHC Higgs boson. The mass formula relating masses of the Top-Mode Pseudos allows us to place an indirect limit on the mass of the CP-odd Top-Mode Pseudo ($A_t^0$) from the constraint on the tHiggs coupling strengths. The presence of the mass formula also significantly affects the coupling property of $A_t^0$, which ensures $A_t^0$ weakly coupled to the Standard Model particles. The direct limit on the mass of $A_t^0$ is placed by data on searches for new resonances in several channels at the LHC Run-I. We find the lower mass bound from both the indirect and direct limits, $m_{A_t^0}\gtrsim 560$ GeV. The discovery channel of $A_t^0$ in the upcoming LHC Run-II is also addressed.

15 pages, 9 figures; v2: discussions updated, some references added, version for publication in PRD and title is changed in published version

References in corpus (4)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Measurement of Higgs boson production and properties in the WW decay channel with leptonic final states
• Evidence for the 125 GeV Higgs boson decaying to a pair of tau leptons

Cited by in corpus (3)

• 750 GeV diphoton resonance in a top and bottom seesaw model
• Vacuum Alignment of the Top-Mode Pseudo-Nambu-Goldstone Boson Higgs Model
• The Dynamical Composite Higgs