Observation and measurement of Higgs boson decays to WW∗ with the ATLAS detector

We report the observation of Higgs boson decays to WW∗ based on an excess over background of 6.1 standard deviations in the dilepton final state, where the Standard Model expectation is 5.8 standard deviations. Evidence for the vector-boson fusion (VBF) production process is obtained with a significance of 3.2 standard deviations. The results are obtained from a data sample corresponding to an integrated luminosity of 25 pb−1 from s√=7 and 8 TeV pp collisions recorded by the ATLAS detector at the LHC. For a Higgs boson mass of 125.36 GeV, the ratio of the measured value to the expected value of the total production cross section times branching fraction is 1.09+0.16−0.15 (stat.)+0.17−0.14 (syst.). The corresponding ratios for the gluon fusion and vector-boson fusion production mechanisms are 1.02±0.19 (stat.)+0.22−0.18 (syst.) and 1.27+0.44−0.40 (stat.)+0.30−0.21 (syst.), respectively. At s√=8 TeV, the total production cross sections are measured to be σ(gg→ H→WW∗)=4.6±0.9(stat.)+0.8−0.7(syst.)pb and σ(VBF H→WW∗)=0.51+0.17−0.15(stat.)+0.13−0.08(syst.)pb. The fiducial cross section is determined for the gluon-fusion process in exclusive final states with zero or one associated jet.

Observation of top-quark pair production in association with a photon and measurement of the t t ¯ γ production cross section in pp collisions at s =7 TeV using the ATLAS detector

A search is performed for top-quark pairs (tt¯) produced together with a photon (γ) with transverse momentum >20 GeV using a sample of tt¯ candidate events in final states with jets, missing transverse momentum, and one isolated electron or muon. The dataset used corresponds to an integrated luminosity of 4.59 fb−1 of proton--proton collisions at a center-of-mass energy of 7 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. In total 140 and 222 tt¯γ candidate events are observed in the electron and muon channels, to be compared to the expectation of 79±26 and 120±39 non-tt¯γ background events respectively. The production of tt¯γ events is observed with a significance of 5.3 standard deviations away from the null hypothesis. The tt¯γ production cross section times the branching ratio (BR) of the single-lepton decay channel is measured in a fiducial kinematic region within the ATLAS acceptance. The measured value is σfidtt¯γ=63±8(stat.)+17−13(syst.)±1(lumi.) fb per lepton flavor, in good agreement with the leading-order theoretical calculation normalized to the next-to-leading-order theoretical prediction of 48±10 fb.

Consumption, wealth, stock and housing returns: evidence from emerging markets

We test the predictive ability of the transitory deviations of consumption from its common trend with aggregate wealth and labour income, cay, for both future equity and housing risk premia in emerging market economies. Using quarterly data for 31 markets, our country-level evidence shows that forecasting power of cay vis-à-vis stock returns is high for Brazil, China, Colombia, Israel, Korea, Latvia and Malaysia. As for housing returns, the empirical evidence suggests that financial and housing assets are perceived as complements in the case of Chile, Russia, South Africa and Thailand, and as substitutes in Argentina, Brazil, Hong Kong, Indonesia, Korea, Malaysia, Mexico and Taiwan. Using a panel econometric framework, we find that the cross-country heterogeneity observed in asset return predictability does not accrue to regional location, but can be attributed to differences in the degree of equity market development and in the level of income.

O preço da água nos municípios portugueses: quais as razões para as suas disparidades?

Dissertação de mestrado em Economia Monetária, Bancária e Financeira

"Quando sair, só quero trabalhar como aqui": perspetivas em torno da Reinserção Social das mulheres ciganas no pós-reclusão

Dissertação de mestrado em Crime, Diferença e Desigualdade

Versão portuguesa das “Escalas de Táticas de Conflito Revisadas”: estudo de validação

As escalas de Táticas de Conflito Revisadas (CTS2) destinam-se a avaliar o modo como os casais resolvem os seus conflitos, através de estratégias de negociação ou de abuso: (a) abuso físico sem sequelas; (b) agressão psicológica; (c) abuso físico com sequelas; (d) coerção sexual. A versão portuguesa foi administrada a uma amostra de 551 estudantes universitários (332 do sexo feminino), 45 dos quais têm uma relação íntima entre si. Considera os cinco factores propostos pelos autores das escalas originais e apresenta valores de consistência interna compreendidos entre .78 e .50. As correlações entre os diferentes tipos de abuso e a desejabilidade social, história de socialização violenta, crime violento, domínio na relação, e ainda a concordância nos heterorrelatos de ambos elementos da díade, testemunham a validade das escalas. Investigadores e técnicos da psicologia e áreas afins têm agora à sua disposição a versão portuguesa das CTS2, que tem demonstrado elevada aplicabilidade na determinação da presença de relações abusivas no seio da família, na avaliação da eficácia de programas de intervenção no contexto forense e em estudos de cariz epidemiológico.