Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 10, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP10(2014)047
Keywords
Hadronic Colliders; Phenomenological Models
Categories
Funding
- National Natural Science Foundation of China (NNSFC) [11275245, 11305049, 11347140, 11405047]
- Specialized Research Fund for the Doctoral Program of Higher Education [20134104120002]
- Startup Foundation for Doctors of Henan Normal University [11112]
- Postdoctoral Science Foundation of China [2014M561987]
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Motivated by the recent LHC Higgs data and null results in searches for any new physics, we investigate the Higgs couplings and naturalness in the littlest Higgs model with T-parity. By performing the global fit of the latest Higgs data, electroweak precise observables and R-b measurements, we find that the scale f can be excluded up to 600 GeV at 2 sigma confidence level. The expected Higgs coupling measurements at the future collider TLEP will improve this lower limit to above 3 TeV. Besides, the top parnter mass m(T+) can be excluded up to 880 GeV at 2 sigma confidence level. The future HL-LHC can constrain this mass in the region m(T+) < 2.2 TeV corresponding to the fine-tuning being lager than 1%.
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