69 research outputs found

    Punching above their weight: a network to understand broader determinants of increasing life expectancy

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    BACKGROUND: Life expectancy initially improves rapidly with economic development but then tails off. Yet, at any level of economic development, some countries do better, and some worse, than expected – they either punch above or below their weight. Why this is the case has been previously researched but no full explanation of the complexity of this phenomenon is available. NEW RESEARCH NETWORK: In order to advance understanding, the newly formed Punching Above Their Weight Research Network has developed a model to frame future research. It provides for consideration of the following INFLUENCES WITHIN A COUNTRY: political and institutional context and history; economic and social policies; scope for democratic participation; extent of health promoting policies affecting socio-economic inequities; gender roles and power dynamics; the extent of civil society activity and disease burdens. CONCLUSION: Further research using this framework has considerable potential to advance effective policies to advance health and equity

    The Forward Physics Facility at the High-Luminosity LHC

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    A study of semileptonic and 2-body decays of charm strange baryons, a search for CP violation in Xi hyperon decays and a study of surface-treated planar microstrip gas chambers

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    Using the CLEO II detector at the Cornell Electron Storage Ring we search for evidence of [special characters omitted] production at e+e − machines in the decay mode Ωc → Ω e+νe. We find 10.4 ± 3.8 candidate events. The probability that the background accounts for all events in the signal region as a statistical fluctuation is 7.7 × 10−4. Our result is B([special characters omitted] → Ω−e+ν e) · σ(e+ e− → [special characters omitted]X) = 0.22 ± 0.08pb. We have measured the product of the decay asymmetry parameters, αΛα Ξ, in the decay chain Ξ− → Λπ −, Λ → p+π −. We find αΛαΞ = −0.293 ± [special characters omitted] which is in good agreement with the current world average α ΛαΞ = −0.293 ± 0.007. Using our reconstructed sample of 4204 ± 75 Ξ− and similar number of Ξ+, we search for evidence of direct CP violation by measuring the asymmetry, [special characters omitted], in the angular distribution of Ξ → Λπ charge conjugate states. In the Standard Model, direct CP violation in hyperons is expected to occur at the 10−4–10−5 level. The observation of CP violation at a higher level may indicate the presence of new physics. We find no evidence of CP violation: [special characters omitted] ≃ AΞ + A Λ = −0.057 ± 0.064 ± 0.028. Given the world average AΛ = −0.03 ± 0.06, we find AΞ = −0.03 ± 0.06 ± 0.07. The systematic error is dominated by the AΛ measurement. We have measured the [special characters omitted] decay asymmetry parameter in the decay [special characters omitted] → Ξ−π+. We find [special characters omitted]αΞ = 0.26 ± [special characters omitted], using the world average of αΞ = −0.456 ± 0.014 we obtain [special characters omitted] = −0.56 ± [special characters omitted] where [special characters omitted] is \u3c0.1 at the 90% CL. The central value occupies the middle of the theoretically expected range but is not yet precise enough to choose between models. We report on the study of surface treated planar microstrip gas chambers. We present the first observation of gas gain suppression in an ion-implanted kapton detector. We report on the results from a beam test on Kapton detectors carried out at the TRIUMF research facility in Vancouver, Canada. A study of the performance of microstrip gas chambers passivated by thin semiconducting glass and plastic films is presented
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