Study of Constrained Minimal Supersymmetry

Taking seriously phenomenological indications for supersymmetry, we have made a detailed study of unified minimal SUSY, including effects at the few percent level in a consistent fashion. We report here a general analysis without choosing a particular unification gauge group. We find that the encouraging SUSY unification results of recent years do survive the challenge of a more complete and accurate analysis. Taking into account effects at the 5-10% level leads to several improvements of previous results, and allows us to sharpen our predictions for SUSY in the light of unification. We perform a thorough study of the parameter space. The results form a well-defined basis for comparing the physics potential of different facilities. Very little of the acceptable parameter space has been excluded by LEP or FNAL so far, but a significant fraction can be covered when these accelerators are upgraded. A number of initial applications to the understanding of the SUSY spectrum, detectability of SUSY at LEP II or FNAL, BR($b\to s\gamma$), Width($Z\to b\bar b$), dark matter, etc, are included in a separate section. We formulate an approach to extracting SUSY parameters from data when superpartners are detected. For small tan(beta) or large $m_top$ both $M_half$ and $M_0$ are entirely bounded from above at O(1 tev) without having to use a fine-tuning constraint.Comment: Michigan preprint UM-TH-93-24, LaTeX, 60 pages without figures. Complete paper with inline figures available by anonymous ftp to williams.physics.lsa.umich.edu in /pub/preprints/UM-TH-93-24.ps.Z (uncompresses to 10MB / 77 pages), or by e-mailing reques

Geoambientes da Península Potter, Ilha Rei George, Antártica Marítima

The scientific community has great attention in the region of the Antarctic Maritime because of the climate changes detected since 1950. Mapping studies of Antarctic environments on detailed scales are limited, mainly due to the limitations of financial resources and logistics. The information generated by mappings makes it possible to detect environmental variations and contribute to the management of land use and occupation. The aim of this work was to identify and to map the geoenvironments of the Potter Peninsula, King George Island, Maritime Antarctica. For that, multi-criteria based analysis of geomorphology, landforms, vegetation and susceptibility to wind action were used to cluster their environmentalcharacteristics. Seven geoenvironments were identified and mapped: Marine terraces, Proglacial area with glaciofluvialaction, Marine terraces with anthropic influence, Marine terraces with vegetation colonization, Proglacial area with paraglacial action, Periglacial area and Glacier area. The ice-free area of the Peninsula has 668 ha and comprises six geoenvironments, with a predominance of terrains with convergent and concave forms and little or inexistent susceptibility to wind action. The seventh geoenvironment is located on the Polar Club glacier. In general, the geoenvironments of the marine terraces have greater fauna and flora biodiversity, while those in the inner part of the peninsula showed predominance of old and young moraines, exposed rocks and lakes.Com as mudanças climáticas na Antártica Marítima detectadas a partir de 1950, essa região tem apresentado grande interesse científico. Estudos de mapeamento dos ambientes antárticos em escalas detalhadas são limitados, principalmente devido às restrições orçamentárias e de logística. As informações geradas por mapeamentos são fundamentais para detectar variações ambientais e auxiliam na gestão do uso e ocupação da superfície terrestre.O objetivo deste trabalho foi identificar e mapear os geoambientes da Península Potter, Ilha Rei George, Antártica Marítima. Para isso, foram utilizadas análises multicritério com base em dados geomorfológicos, modelo de curvatura das vertentes, cobertura de vegetação e suscetibilidade à ação eólica, o que possibilitou a elaboração do zoneamento de suasprincipais características ambientais. Foram identificadas sete unidades geoambientais: Terraços marinhos, Área proglacial com atividade glaciofluvial, Terraços marinhos com ação antrópica, Terraços marinhos com cobertura de vegetação, Áreaproglacial com intensa atividade paraglacial, Áreaperiglacial e Área glacial. A área livre de gelo da Península tem 668 ha e engloba seis geoambientes, com predomínio de relevos com formas convergentes e côncavas e vertentes com pouca ou nenhuma suscetibilidade à ação eólica. O sétimo geoambiente está localizado na geleira Polar Club. Os geoambientesdos terraços marinhos exibem maior biodiversidade de fauna e flora antártica, enquanto aqueles da porção interna da exibem predomínio de morainas, rochas expostas e lagos decorrentes da ablação da neve e gelo da superfície e da geleira Polar Club

Integrated Ugi-Based Assembly of Functionally, Skeletally, and Stereochemically Diverse 1,4-Benzodiazepin-2-ones

A practical, integrated and versatile U-4CR-based assembly of 1,4-benzodiazepin-2-ones exhibiting functionally, skeletally, and stereochemically diverse substitution patterns is described. By virtue of its convergence, atom economy, and bond-forming efficiency, the methodology documented herein exemplifies the reconciliation of structural complexity and experimental simplicity in the context of medicinal chemistry projects.This work was financially supported by the Galician Government (Spain), Projects: 09CSA016234PR and GPC-2014-PG037. J.A. thanks FUNDAYACUCHO (Venezuela) for a predoctoral grant and Deputación da Coruña (Spain) for a postdoctoral research grant. A.N.-V. thanks the Spanish government for a Ramón y Cajal research contract

Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in √s = 7 TeV pp collisions with the ATLAS detector

A search for the direct production of charginos and neutralinos in final states with three electrons or muons and missing transverse momentum is presented. The analysis is based on 4.7 fb−1 of proton–proton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with Standard Model expectations in three signal regions that are either depleted or enriched in Z-boson decays. Upper limits at 95% confidence level are set in R-parity conserving phenomenological minimal supersymmetric models and in simplified models, significantly extending previous results

Co-Housing Rodents with Different Coat Colours as a Simple, Non-Invasive Means of Individual Identification:Validating Mixed-Strain Housing for C57BL/6 and DBA/2 Mice

Standard practice typically requires the marking of laboratory mice so that they can be individually identified. However, many of the common methods compromise the welfare of the individuals being marked (as well as requiring time, effort, and/or resources on the part of researchers and technicians). Mixing strains of different colour within a cage would allow them to be readily visually identifiable, negating the need for more invasive marking techniques. Here we assess the impact that mixed strain housing has on the phenotypes of female C57BL/6 (black) and DBA/2 (brown) mice, and on the variability in the data obtained from them. Mice were housed in either mixed strain or single strain pairs for 19 weeks, and their phenotypes then assessed using 23 different behavioural, morphological, haematological and physiological measures widely used in research and/or important for assessing mouse welfare. No negative effects of mixed strain housing could be found on the phenotypes of either strain, including variables relevant to welfare. Differences and similarities between the two strains were almost all as expected from previously published studies, and none were affected by whether mice were housed in mixed- or single-strain pairs. Only one significant main effect of housing type was detected: mixed strain pairs had smaller red blood cell distribution widths, a measure suggesting better health (findings that now need replicating in case they were Type 1 errors resulting from our multiplicity of tests). Furthermore, mixed strain housing did not increase the variation in data obtained from the mice: the standard errors for all variables were essentially identical between the two housing conditions. Mixed strain housing also made animals very easy to distinguish while in the home cage. Female DBA/2 and C57BL/6 mice can thus be housed in mixed strain pairs for identification purposes, with no apparent negative effects on their welfare or the data they generate. This suggests that there is much value in exploring other combinations of strains