University of Oklahoma

About: University of Oklahoma is a education organization based out in Norman, Oklahoma, United States. It is known for research contribution in the topics: Population & Radar. The organization has 25269 authors who have published 52609 publications receiving 1821706 citations. The organization is also known as: OU & Oklahoma University.

Implications of a 125 GeV Higgs scalar for the LHC supersymmetry and neutralino dark matter searches

Abstract: The ATLAS and CMS collaborations have reported an excess of events in the $\ensuremath{\gamma}\ensuremath{\gamma}$, $Z{Z}^{*}\ensuremath{\rightarrow}4\ensuremath{\ell}$ and $W{W}^{*}$ search channels at an invariant mass $m\ensuremath{\simeq}125\text{ }\text{ }\mathrm{GeV}$, which could be the first evidence for the long-awaited Higgs boson. We investigate the consequences of requiring ${m}_{h}\ensuremath{\simeq}125\text{ }\text{ }\mathrm{GeV}$ in both the minimal supergravity and 2-parameter nonuniversal Higgs supersymmetric models. In minimal supergravity, large values of trilinear soft breaking parameter $|{A}_{0}|$ are required, and universal scalar ${m}_{0}\ensuremath{\gtrsim}0.8\text{ }\text{ }\mathrm{TeV}$ is favored so that we expect squark and slepton masses typically in the multi-TeV range. This typically gives rise to an ``effective supersymmetric'' type of sparticle mass spectrum. In this case, we expect gluino pair production as the dominant sparticle creation reaction at LHC. For ${m}_{0}\ensuremath{\lesssim}5\text{ }\text{ }\mathrm{TeV}$, the superpotential parameter $\ensuremath{\mu}\ensuremath{\gtrsim}2\text{ }\text{ }\mathrm{TeV}$ and ${m}_{A}\ensuremath{\gtrsim}0.8\text{ }\text{ }\mathrm{TeV}$, greatly restricting neutralino annihilation mechanisms. These latter conclusions are softened if ${m}_{0}\ensuremath{\sim}10--20\text{ }\text{ }\mathrm{TeV}$ or if one proceeds to the 2-parameter nonuniversal Higgs model. The standard neutralino abundance tends to be far above WMAP-measured values unless the neutralino is Higgsino-like. We remark upon possible nonstandard (but perhaps more attractive) cosmological scenarios which can bring the predicted dark matter abundance into accord with the measured value, and discuss the implications for direct and indirect detection of neutralino cold dark matter.

The asymmetric effects of uncertainty on inflation and output growth

Abstract: We study the effects of growth volatility and inflation volatility on average rates of output growth and inflation for post-war US data. Our results suggest that increased growth uncertainty is associated with significantly lower average growth, while higher inflation uncertainty is significantly negatively correlated with lower output growth and lower average inflation. Both inflation and growth display evidence of significant asymmetric response to positive and negative shocks of equal magnitude. Copyright © 2004 John Wiley & Sons, Ltd.