LHC optics and elastic scattering measured by the TOTEM experiment

The TOTEM experiment at the LHC has measured proton-proton elastic scattering in dedicated runs at $\sqrt{s}=7$ and 8 TeV centre-of-mass LHC energies. The proton-proton total cross-section $\sigma_{\rm tot}$ has been derived for both energies using a luminosity independent method. TOTEM has excluded a purely exponential differential cross-section for elastic proton-proton scattering with significance greater than 7$\sigma$ in the $|t|$ range from 0.027 to 0.2 GeV$^{2}$ at $\sqrt{s}=8$ TeV.Comment: Proceedings, 17th Lomonosov Conferenc

How flexible are real wages in EU countries? A panel investigation

In this paper we estimate the degree of real wage flexibility in 19 EU countries in a wage Phillips curve panel framework. We find evidence for a reaction of wage growth to unemployment and productivity growth. However, due to unemployment persistence, over time the real wage response weakens substantially. Our results suggest that the degree of real wage flexibility tends to be larger in the central and eastern European (CEE) countries than in the euro area; weaker in downturns than during upswings. Moreover, there exists an inflation threshold, below which real wage flexibility seems to decrease. Finally, we find that part of the heterogeneity in real wage flexibility and unemployment might be related to differences in the wage bargaining institutions and more specifically the extent of labour market regulation in different country groups within the EU. JEL Classification: J31, J38, P5bargaining institutions, central and eastern Europe, euro area, panel heterogeneity, real wage flexibility

Cross-border labour mobility within an enlarged EU

This paper examines the potential for increased cross-border labour mobility within the EU-25 and considers the costs and benefits of any increase in labour mobility to both sending and receiving countries in the medium to long run. Evidence from previous EU enlargement experiences, academic studies, the existence of barriers to mobility within the EU and the economic determinants of migration all indicate a moderate potential for increased migrant flows. The magnitude of cross-border labour flow in the medium to long run will most likely be largely a function of the demand for migrants and the speed at which the EU-8 catches up economically with the EU-15. If broad-based economic growth and social development continues in the EU-8, labour migration will most likely decrease. In addition, faster population ageing in the EU-8 tends towards dampening migration flow from the new Member States in the medium term. In terms of costs and benefits, for the EU-8 countries labour migration, especially in the short run, may present a number of challenges. Emigration may tend to weigh disproportionally on the pool of young and educated workers, aggravating labour market bottlenecks in a number of EU-8 countries. For the EU-25 as a whole, cross-border labour mobility is likely to offer a number of advantages, by allowing a more efficient matching of workers‘ skills with job vacancies and facilitating the general upskilling of European workforces. The current restrictions on labour mobility from the EU-8 countries to the other EU member countries stand in contrast with one of the central principles of the EU – the free movement of labour. Furthermore, these restrictions may decrease the efficient use of labour resources in the face of demographic change and globalisation and hamper an important adjustment mechanism within EMU. Delaying the removal of these barriers may be costly for the EU-25 at a time when leaders are concerned about Europe‘s international competitiveness and may increase illegal work in a number of countries. Finally, it would not be beneficial for Europe to loose a significant part of the most agile and talented individuals from the new Member States to more traditional migration centres such as the US and Canada.

Characterization of the interface between the bulk glass forming alloy Zr_(41)Ti_(14)Cu_(12)Ni_(10)Be_(23) with pure metals and ceramics

The reaction of the bulk glass forming alloy Zr_(41)Ti_(14)Cu_(12)Ni_(10)Be_(23) (Vit 1) with W, Ta, Mo, AlN, Al_2O_3, Si, graphite, and amorphous carbon was investigated. Vit 1 samples were melted and subsequently solidified after different processing times on discs of the different materials. Sessile drop examinations of the macroscopic wetting of Vit 1 on the discs as a function of temperature were carried out in situ with a digital optical camera. The reactions at the interfaces between the Vit 1 sample and the different disc materials were investigated with an electron microprobe. The structure and thermal stability of the processed Vit 1 samples were examined by x-ray diffraction and differential scanning calorimetry. The results are discussed in terms of possible applications for composite materials