Improved measurement of the K+->pi+nu(nu)over-bar branching ratio

An additional event near the upper kinematic limit for K+-->pi(+)nu(nu) over bar has been observed by experiment E949 at Brookhaven National Laboratory. Combining previously reported and new data, the branching ratio is B(K+-->pi(+)nu(nu) over bar)=(1.47(-0.89)(+1.30))x10(-10) based on three events observed in the pion momentum region 211<P<229 MeV/c. At the measured central value of the branching ratio, the additional event had a signal-to-background ratio of 0.9

New Measurement of the K+->pi(+)nu nu Branching Ratio

Three events for the decay K+->pi(+)nu have been observed in the pion momentum region below the K+->pi(+)pi(0) peak, 140 pi(+)nu nu)=(1.73(-1.05)(+1.15))x10(-10) consistent with the standard model prediction

Giant nonlinear optical activity in a plasmonic metamaterial

In 1950, a quarter of a century after his first ever nonlinear optical experiment when intensity dependent absorption was observed in uranium-doped glass, Sergey Vavilov predicted that birefringence, dichroism and polarization rotatory power should be dependent on light intensity. It required the invention of the laser to observe the barely detectable effect of light intensity on the polarization rotary power of the optically active lithium iodate crystal, the phenomenon now known as the nonlinear optical activity, a high-intensity counterpart of the fundamental optical effect of polarization rotation in chiral media. Here we report that a plasmonic metamaterial exhibits nonlinear optical activity 30 million times stronger than lithium iodate crystals thus transforming this fundamental phenomenon of polarization nonlinear optics from an esoteric phenomenon into a major effect of nonlinear plasmonics with potential for practical applications

Collecting data on TMTs’ organizational design: good practices from the StiMa project

Studying how Top Management Teams (TMTs) organize their managerial labor and decision-making processes is a relevant research avenue in light of the prominence of TMTs within modern firms. However, data on TMTs’ organizational design are usually not available from secondary sources and must instead be collected through surveys given to top executives. To help researchers in this difficult endeavor, the present paper offers a set of good practices for designing and implementing surveys on TMTs’ organizational design. To this end, we use as a basis the first-hand experience that we gained by working on the StiMa project, a large-scale data collection effort concerning the TMTs of a representative sample of Italian firms. We describe in detail all of the steps that we followed in preparing and administering the survey and in setting up and executing the additional data collection from secondary sources, which integrates survey data. We are confident that the lessons we learned from the StiMa project will help scholars in gathering better data on TMTs’ organizational design, thus advancing academics’ and practitioners’ conversations on the topic

Alliance Network Centrality, Board Composition, and Corporate Social Performance

What critical characteristics do firms have that determine the scale and scope of corporate social responsibility activities they undertake? This paper examines two disparate predictors of corporate social performance. First, using the lens of the resource-based view, we examine the role of alliance network centrality on corporate social performance. We find that centrality enhances corporate social performance. Second, we investigate how board composition affects corporate social performance. Specifically, drawing on stakeholder theory, we find that the percentage of female directors predicts greater corporate social performance. In addition, we look at the influence of outside directors on this relationship. Our findings show that the presence of more outside directors positively moderates the relationship between female directors and corporate social performance