39 research outputs found
Combined Tevatron upper limit on gg->H->W+W- and constraints on the Higgs boson mass in fourth-generation fermion models
Report number: FERMILAB-PUB-10-125-EWe combine results from searches by the CDF and D0 collaborations for a standard model Higgs boson (H) in the process gg->H->W+W- in p=pbar collisions at the Fermilab Tevatron Collider at sqrt{s}=1.96 TeV. With 4.8 fb-1 of integrated luminosity analyzed at CDF and 5.4 fb-1 at D0, the 95% Confidence Level upper limit on \sigma(gg->H) x B(H->W+W-) is 1.75 pb at m_H=120 GeV, 0.38 pb at m_H=165 GeV, and 0.83 pb at m_H=200 GeV. Assuming the presence of a fourth sequential generation of fermions with large masses, we exclude at the 95% Confidence Level a standard-model-like Higgs boson with a mass between 131 and 204 GeV.We combine results from searches by the CDF and D0 collaborations for a standard model Higgs boson (H) in the process ggâHâW+W- in ppÌ
collisions at the Fermilab Tevatron Collider at âs=1.96ââTeV. With 4.8ââfb-1 of integrated luminosity analyzed at CDF and 5.4ââfb-1 at D0, the 95% confidence level upper limit on Ï(ggâH)ĂB(HâW+W-) is 1.75 pb at mH=120ââGeV, 0.38 pb at mH=165ââGeV, and 0.83 pb at mH=200ââGeV. Assuming the presence of a fourth sequential generation of fermions with large masses, we exclude at the 95% confidence level a standard-model-like Higgs boson with a mass between 131 and 204 GeV.Peer reviewe
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Early-life Origins of Lifecycle Well-being: Research and Policy Implications
Mounting evidence across different disciplines suggests that early-life conditions can have consequences on individual outcomes throughout the life cycle. Relative to other developed countries, the United States fares poorly on standard indicators of early-life health, and this disadvantage may have profound consequences not only for population well-being, but also for economic growth and competitiveness in a global economy. In this paper, we first discuss the research on the strength of the link between early-life health and adult outcomes, and then provide an evidence-based review of the effectiveness of existing U.S. policies targeting the early-life environment. We conclude that there is a robust and economically meaningful relationship between early-life conditions and well-being throughout the life cycle, as measured by adult health, educational attainment, labor market attachment, and other indicators of socioeconomic status. However, there is some variation in the degree to which current policies in the United States are effective in improving early-life conditions. Among existing programs, some of the most effective are the Special Supplemental Program for Women, Infants, and Children (WIC), home visiting with nurse practitioners, and high-quality, center-based early-childhood care and education. In contrast, the evidence on other policies such as prenatal care and family leave is more mixed and limited
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Weathering the Storm: Hurricanes and Birth Outcomes
A growing literature suggests that stressful events in pregnancy can have negative effects on birth
outcomes. Some of the estimates in this literature may be affected by small samples, omitted
variables, endogenous mobility in response to disasters, and errors in the measurement of
gestation, as well as by a mechanical correlation between longer gestation and the probability of
having been exposed. We use millions of individual birth records to examine the effects of
exposure to hurricanes during pregnancy, and the sensitivity of the estimates to these econometric
problems. We find that exposure to a hurricane during pregnancy increases the probability of
abnormal conditions of the newborn such as being on a ventilator more than 30 minutes and
meconium aspiration syndrome (MAS). Although we are able to reproduce previous estimates of
effects on birth weight and gestation, our results suggest that measured effects of stressful events
on these outcomes are sensitive to specification and it is preferable to use more sensitive indicators
of newborn health
Family and Medical Leave Act
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