Recent results of the searches for Supersymmetry in final states with one or two leptons at CMS are presented. Many Supersymmetry scenarios, including the Constrained Minimal Supersymmetric extension of the Standard Model (CMSSM), predict a substantial amount of events containing leptons, while the largest fraction of Standard Model background events -which are QCD interactions -gets strongly reduced by requiring isolated leptons. The analyzed data was taken in 2011 and corresponds to an integrated luminosity of approximately L = 1 fb −1 . The center-of-mass energy of the pp collisions was √ s = 7 TeV.
Persistent photoconductivity (P PC) and metastable photoinduced superconductivity, recently discovered in semiconducting YBa2Cu306+, have been investigated over the oxygen content of 0&x &1. Under exposure of semiconducting YBa,Cu306+ films (x =0.4) to visible light their resistance is found to decrease drastically. After interrupting the irradiation the resistance persists at this reduced level provided that the temperature is kept below 270 K. When the illumination dose is increased the semiconductorlike behavior of the films progressively changes to that of a metal and a superconductor. Prolonged irradiation leads to complete loss of resistivity below 5 K and simultaneous growth of a diamagnetic moment in the films, revealing pronounced enhancement of their superconducting properties. A slow relaxation of the PPC state was found only by warming the sample near to room temperature where it could be described by a thermally activated process with an energy barrier of -1 eV. The observed phenomena are attributed to photoexcitation of extra mobile holes into CuO, planes, allowing a metastable superconducting phase to be initiated. We also discuss feasible microscopic mechanisms of PPC in oxygen-deficient Y-Ba-Cu-0 films. It is suggested that the photoinduced superconductivity may have applications in fabrication of in situ optically tunable weak-link devices.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.