Interference of Conversion and Bremsstrahlung Amplitudes in the Decay K_L -> mu^+ mu^- gamma

In the region of large mu^+ mu^- invariant mass, the decay spectrum of K_L -> mu^+ mu^- gamma deviates from the Dalitz pair spectrum, as a result of interference between conversion (K_L -> gamma^* gamma -> mu^+ mu^- gamma) and bremsstrahlung amplitudes. The latter is proportional to the K_L -> mu^+ mu^- matrix element, whose 2 gamma-absorptive part appears to dominate the observed K_L -> mu^+ mu^- decay rate. We examine the extent to which a scrutiny of the K_L -> mu^+ mu^- gamma spectrum in the end-point region could provide evidence on the real part of the K_L -> mu^+ mu^- amplitude. As a by-product, we obtain the absorptive part of the K_L -> gamma^* gamma form factor, using data on the K_L -> pi^+ pi^- gamma spectrum.Comment: 7 pages, 4 figure

Latest Results on Weak Semi-Leptonic Hyperon Decays in KTeV

The KTeV experiment at Fermilab has finished its $\Xi^0$ semi-leptonic decay analysis from the 1997 run and presented here are the final numbers for the branching ratio and form factors. A new run with three times the statistics was taken in 1999 and a first look at the data shows the quality and consistency of the results, predicting a similar improvement in these measurements.Comment: 4 pages and 4 figures, presented at IV Int. Conference on Hyperons, Charm and Beauty, Valencia Spain, 26-30 June 200

The Impact of Public and Private Health Expenditures on Poverty in developing countries

Background & Objectives: Changes in twenty-first century and incidence of development gap among countries has caused particular attention of all economic schools to the problem of poverty and the factors affecting it, as a consequence of underdevelopment. Health and health expenditures are considered as a tool for governments to get out from poverty. Methods: This study is one type of econometric studies with using panel data for Iran and 30 developing countries during 2005 to 2012. To determine the effect of health expenditures on poverty headcount ratio, Hassman and Chow tests were used in order to select the type of random or fixed effect regression model. Data analysis was done through Eviews 6 software. Results: Among factors affecting poverty, health expenditure had more significant impact on poverty. So that, one unit increase in public and private health expenditures caused respectively -2.93 decrease and 1.19 unit increase in headcount poverty ratio. In comparison to health expenditure, access to health facilities and primary school enrollment rate with respectively coefficients of -0.81 and 0.34 had less impact on poverty headcount ratio. Conclusion: Governments should pay more attention to policies of financing health sector and more expansion of governmental functions in financial support of health sector rather than private sector. Key¬words: Public Health Expenditure, Private Health Expenditure, Poverty Headcount Ratio ¬Citation: Harati J, Harati Khalilabad T, Rezapour A. The Impact of Public and Private Health Expenditures on Poverty in developing countries: 2005– 2012. Journal of Health Based Research 2016; 2(4): 345-354

Heterogeneity in the Egyptian informal labour market: choice or obligation?

URL des Documents de travail : http://centredeconomiesorbonne.univ-paris1.fr/bandeau-haut/documents-de-travail/Documents de travail du Centre d'Economie de la Sorbonne 2013.32 - ISSN : 1955-611XThis paper provides historical and empirical arguments that can explain the development of the Egyptian informal sector. After recalling the various approaches proposed in the literatures, it identifies the configuration that overrides the Egyptian labor market by allowing for the heterogeneity of informal jobs and therefore the existence of different segments within the informal sector using a mixture model. It concludes that the Egyptian informal labor market in 2006 was composed of two segments with a distinct wage equations. This may point to the existence of barriers to entry to each sector, e.g. fixed cost related to social stigma which prevent people from working in the sector which offers them the highest expected wage.Ce papier fournit des arguments historiques et empiriques dont le but est d'expliquer le développement du secteur informel en Egypte. Après avoir rappelé les différentes approches proposées dans la littérature, il identifie la configuration du marché du travail égyptien tout en permettant l'hétérogénéité des emplois informels et donc l'existence de différents segments du secteur informel en utilisant un modèle de mélange. Il conclut que le marché du travail égyptien informel en 2006 était composé de deux segments ayant chacun une équation de salaires distincts. Ceci peut indiquer l'existence de barrières à l'entrée à chaque secteur, par exemple, des coûts fixes liés à la stigmatisation sociale qui empêchent les gens de travailler dans le secteur qui leur offre le plus haut salaire espéré