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- HEATHER E. LOGAN
- 2003

The little Higgs idea is a new way to solve the little hierarchy problem by protecting the Higgs mass from quadratically divergent one-loop corrections. In this talk I describe the phenomenology of one particular realization of the little Higgs idea: the " Littlest Higgs " model.

- M. Dührssen, S. Heinemeyer, H. Logan, D. Rainwater, G. Weiglein, D. Zeppenfeld
- 2004

We show how LHC Higgs boson production and decay data can be used to extract gauge and fermion couplings of Higgs bosons. We show that very mild theoretical assumptions, which are valid in general multi-Higgs doublet models, are sufficient to allow the extraction of absolute values for the couplings rather than just ratios of the couplings. For Higgs masses… (More)

The decoupling properties of the Higgs sector in the Minimal Supersymmetric Standard Model (MSSM) imply that a light CP-even Higgs boson discovered at the Tevatron or LHC may closely resemble the Standard Model (SM) Higgs boson. In this paper, we investigate how precision measurements of Higgs properties at a Linear Collider (LC) can distinguish between a… (More)

- H. E. Haber, M. J. Herrero, H. E. Logan, S. Peñaranda, S. Rigolin
- 2001

We study the supersymmetric (SUSY) QCD radiative corrections, at the one-loop level, to h 0 , H ± and t quark decays, in the context of the Minimal Supersymmetric Standard Model (MSSM) and in the decoupling limit. The decoupling behaviour of the various MSSM sectors is analyzed in some special cases, where some or all of the SUSY mass parameters become… (More)

- S Heinemeyer, S Kanemura, H Logan, A Raspereza, T Tait, H Baer +28 others
- 2005

This report reviews the properties of Higgs bosons in the Standard Model (SM) and its various extensions. We give an extensive overview about the potential of the ILC operated at centre-of-mass energies up to 1 TeV (including the γγ option) for the determination of the Higgs boson properties. This comprises the measurement of the Higgs boson mass, its… (More)

- Tao Han, Heather E. Logan, Lian-Tao Wang
- 2005

Little Higgs models predict new gauge bosons, fermions and scalars at the TeV scale that stabilize the Higgs mass against quadratically divergent one-loop radiative corrections. We categorize the many little Higgs models into two classes based on the structure of the extended electroweak gauge group and examine the experimental signatures that identify the… (More)

- Heather E. Logan
- 1999

We explore the radiative corrections to the process Z → b ¯ b in models with extended Higgs sectors. The observables R b and A b are sensitive to these corrections. R b is the hadronic branching fraction of Z bosons to b ¯ b, R b = Γ(Z → b ¯ b)/Γ(Z → hadrons). A b is the b quark asymmetry, A b = (g 2 L − g 2 R)/(g 2 L + g 2 R) where g L and g R are the left… (More)

BACKGROUND
Surgical design and simulation (SDS) is a useful tool to help surgeons visualize the anatomy of the patient and perform operative maneuvers on the computer before implementation in the operating room. While these technologies have many advantages, further evidence of their potential to improve outcomes is required. The present benchtop study was… (More)

BACKGROUND
It is important to understand the perceived value of surgical design and simulation (SDS) amongst surgeons, as this will influence its implementation in clinical settings. The purpose of the present study was to examine the application of the convergent interview technique in the field of surgical design and simulation and evaluate whether the… (More)

- Tao Han, Heather E. Logan
- 2005

We investigate the sources of neutrino mass generation in Little Higgs theories, by confining ourselves to the " Littlest Higgs " scenario. Our conclusion is that the most satisfactory way of incorporating neutrino masses is to include a lepton-number violating interaction between the scalar triplet and lepton doublets. The tree-level neutrino masses… (More)