Mark D. Goodsell

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OBJECTIVE To establish the short-term effects of lumbar posteroanterior mobilization in patients with low-back pain, compared with a control intervention. DESIGN Self-controlled cross-over design. MAIN OUTCOME MEASURES The force-displacement characteristics of the spine in response to the application of a posteroanterior force, lumbar flexion, and(More)
The Yukawa couplings of the simpler models of D-branes on toroidal orientifolds suffer from the so-called “rank one” problem – there is only a single nonzero mass and no mixing. We consider the one-loop contribution of E2-instantons to Yukawa couplings on intersecting D6-branes, and show that they can solve the rank one problem. In addition they have the(More)
The reproducibility of cervical and cervicothoracic curvature in an unconstrained standing position was examined in 17 volunteers. Parameters investigated included three angles of cervical inclination (the angle between the horizontal and a line drawn between C2 and C7, C2 and T1, and C2 and T2 respectively), cervical lordosis, and cervicothoracic kyphosis.(More)
We present an extension to the Mathematica package SARAH which allows for Higgs mass calculations at the two-loop level in a wide range of supersymmetric (SUSY) models beyond the MSSM. These calculations are based on the effective potential approach and include all two-loop corrections which are independent of electroweak gauge couplings. For the numerical(More)
This paper describes the physics case for a new fixed target facility at CERN SPS. The SHiP (search for hidden particles) experiment is intended to hunt for new physics in the largely unexplored domain of very weakly interacting particles with masses below the Fermi scale, inaccessible to the LHC experiments, and to study tau neutrino physics. The same(More)
STUDY DESIGN In this study, parameters of sagittal cervical posture obtained from surface markers and from vertebral body locations were compared. OBJECTIVES Several postural parameters were examined to establish the degree to which surface measures of cervical alignment reflect the underlying vertebral body alignment. SUMMARY OF BACKGROUND DATA(More)
We extend the formulation by Meade, Seiberg and Shih of general gauge mediation of supersymmetry breaking to include Dirac masses for the gauginos. These appear through mixing of the visible sector gauginos with additional states in adjoint representations. We illustrate the method by reproducing the existing results in the literature for the gaugino and(More)
Extra “hidden” U(1) gauge factors are a generic feature of string theory that is of particular phenomenological interest. They can kinetically mix with the Standard Model photon and are thereby accessible to a wide variety of astrophysical and cosmological observations and laboratory experiments. In this paper we investigate the masses and the kinetic(More)
We calculate the corrections to the Higgs mass in general theories restricted to the case of massless gauge bosons (the gaugeless limit). We present analytic expressions for the two-loop tadpole diagrams, and corresponding expressions for the zero-momentum limit of the Higgs self-energies, equivalent to the second derivative of the twoloop effective(More)
We study kinetic mixing between massless U(1) gauge symmetries in the bosonic formulation of heterotic orbifold compactifications. For non-prime ZN factorisable orbifolds, we find a simple expression of the mixing in terms of the properties of the N = 2 subsectors, which helps understand under what conditions mixing can occur. With this tool, we analyze(More)