The Standard Model of elementary particles can not be the final theory. There are theoretical reasons to expect the appearance of new physics, possibly at the energy scale of few TeV. Several possible theories of new physics have been proposed, each with unknown probability to be confirmed. Instead of arbitrarily choosing to examine one of those theories, this thesis is about searching for any ...

We explore how the polarization of the tau leptons in the cascade decay q̃ → qχ̃2 → qτ τ̃ → qττ χ̃1 can be exploited to study mixing properties of neutralinos and staus. We present details of the analysis including experimental effects such as transverse momentum cuts for the τ → πν decay mode, and show that the di-pion invariant mass distribution provides valuable information on their properties. ...

We describe the search for the associated production of χ̃1 and χ̃ 0 2 particles. In gravity-mediated SUSY models, these particles may decay promptly to produce a trilepton final state which would be observable in a hadron collider environment. By requiring two like-sign leptons, the signal acceptance is increased with respect to requiring three leptons, while maintaining a low background. We use...

The formation of cadmium sulfide (CdS) particles in the gaps between the layers of the multilamellar vesicles is described, introducing a new pathway in the preparation of nanometer-scale particles. The in situ structural characterization of both the CdS particles and the vesicles as a reaction medium was performed in the early and final states of the process by using anomalous small-angle X-ra...

In a previous paper [Hidalgo et al., Phys. Rev. Lett. 103, 118001 (2009)] it was shown that square particles deposited in a silo tend to align with a diagonal parallel to the gravity, giving rise to a deposit with very particular properties. Here we explore, both experimentally and numerically, the effect on these properties of the filling mechanism. In particular, we modify the volume fraction...

We consider a synchronous dispersion process introduced in [1] and we show that on the infinite line the final set of occupied sites takes up O(n) space, where n is the number of particles involved.

Along the way, by way of illustration, I evaluate various players and teams with respect to baseadvance average. The evaluation of teams leads to further statistical comparisons. Here, the results are equally decisive in favor of base-advance average. For example, over the period 2000-2004, baseadvance average for-and-against predicts wins just as well as runs for-and-against. This is because, ...

Archived data from four courses taught with computer-aided personalized system of instruction (CAPSI) – an online, self-paced, instructional program – were used to explore the relationship between objectively rescored final exam grades, peer reviewing, and progress rate – i.e., the rate at which students completed unit tests. There was a strong positive correlation (r = .68, p < .01) between ra...

A simple procedure is presented which leads to a dramatic simplification in the calculation of the relic density of stable particles in the Universe. 1 E-mail address: [email protected] Any stable species χ contributes to the total mass-energy density in the Universe. If its number density cannot be reduced efficiently enough before it decouples from the thermal equilibrium, i...

The possibility to align and organize faceted particles in the bulk offers intriguing possibilities for the design and discovery of materials and architectures exhibiting novel functional properties. The growth of ice crystals can be used to trigger the self-assembly of large, anisotropic particles and consequently to obtain three-dimensional porous materials of large dimensions in a limited am...