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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 703 records · Page 39

Development of a Lightweight Silicon Pixel Detector for CMS to Search for New Physics in the Top Quark Sector

The discovery of a Higgs boson at the Large Hadron Collider (LHC) is one of the greatest achievements of experimental particle physics and a triumph for theoretical physics, which culminates in the very successful standard model (SM). Currently the LHC collider provides particle collisions at highest possible energies of $\sqrt{s}=13$ TeV, opening a new energy domain. Little Higgs models predict a heavy top quark partner, T, which would cancel the aforementioned top quark loop contributions to the Higgs boson mass. This particle is predicted to have a mass near the TeV scale. We search for a "vector-like" top partner which is an electroweak singlet and has vector couplings to W and Z bosons.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗

A Feasibility Study of a Novel Variable-Aperture Full-Ring SPECT using Large-Area Pixelated CZT Modules: Simulation Results

Emerging single photon emission computed tomography (SPECT) scanner using cadmium zinc telluride (CZT) offers improved quantitative imaging capability over conventional NaI(Tl)-based SPECT scanner. In this study, on top of the previously-developed energy-optimized parallel collimator design [1], we further evaluated a full-ring SPECT system design with eight large-area CZT detectors. In order to evaluate the imaging performance of our proposed CZT-SPECT system, we employed analytical phantom and brain phantom, using a conventional NaI(Tl)-SPECT system as a reference.

36 MATERIALS SCIENCE↗