2,334 research outputs found
A 125 GeV Higgs and its di-photon signal in different SUSY models: a mini review
In this note we briefly review our recent studies on a 125 GeV Higgs and its
di-photon signal rate in different low energy supersymmetric models, namely the
minimal supersymmetric standard model (MSSM), the next-to-minimal
supersymmetric standard model (NMSSM), the nearly minimal supersymmetric
standard model (nMSSM) and the constrained MSSM. Our conclusion is: (i) In the
allowed parameter space the SM-like Higgs boson can easily be 125 GeV in the
MSSM, NMSSM and nMSSM, while it is hard to realize in the constrained MSSM;
(ii) The di-photon Higgs signal rate in the nMSSM and constrained MSSM is
suppressed relative to the prediction of the SM, while the signal rate can be
enhanced in the MSSM and NMSSM; (iii) The NMSSM may allow for a lighter
top-squark than the MSSM, which can thus ameliorate the fine-tuning problem.Comment: 16 pages, 8 figures,version in Advances in High Energy Physic
The Impact of Market Timing on Canadian and U.S. Firms' Capital Structure
This paper studies the impact of market timing on Canadian firms' capital structure and makes a comparison with U.S. firms. There is no evidence that market timing affects Canadian firms' capital structure in the same manner as it affects their U.S. counterparts. The effect of past equity issues on Canadian firms' capital structure is transitory. Canadian firms adjust at a faster rate toward the leverage target than U.S. firms. These results challenge the generality of the market-timing theory of capital structure.Financial markets; International topics
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