Precision radiative corrections to the Dalitz plot of baryon semileptonic decays including the spin-momentum correlation of the decaying baryon and the emitted charged lepton

We calculate the radiative corrections to the angular correlation between the polarization of the decaying baryon and the direction of the emitted charged lepton in the semileptonic decays of spin one-half baryons to order (\alpha/\pi)(q/M_1). The final results are presented, first, with the triple integration of the bremsstrahlung photon ready to be performed numerically and, second, in an analytical form. A third presentation of our results in the form of numerical arrays of coefficients to be multiplied on the quadratic products of form factors is discussed. This latter may be the most practical one to use in Monte Carlo simulations. A series of crosschecks is performed. The results are useful in the analysis of the Dalitz plot of precision experiments involving light and heavy quarks and is not compromised to fixing the form factors at predetermined values. It is assumed that the real photons are kinematically discriminated. Otherwise, our results have a general model-independent applicability.Comment: 8 pages, RevTex4, 5 tables, no figures. Shortened version; results and conclusions remain unchange

Precision radiative corrections to the semileptonic Dalitz plot with angular correlation between polarized decaying and emitted baryons: Effects of the four-body region

Analytical radiative corrections of order (\alpha/\pi)(q/M_1) are calculated for the four-body region of the Dalitz plot of baryon semileptonic decays when the s_1 \cdot p_2 correlation is present. Once the final result is available, it is possible to exhibit it in terms of the corresponding final result of the three-body region following a set of simple changes in the latter. We cover two cases, a charged and a neutral polarized decaying baryon.Comment: Revtex4, 7 pages, no figure

Education à L’Environnement : Nouvelle Approche

A l’instar des politiques à grande échelle de protection de l’Environnement initiées par les institutions internationales, une approche beaucoup plus simpliste centrée autour de l’individu met en exergue un système de motivation exclusive. Cette dernière contribuera à améliorer la préservation de la nature. Une fois les comportements individuels désastreux éradiqués au fil du temps, les conséquences dégradantes sur notre Environnement seront minimisées. Ainsi, un engagement personnel permet de s’autoévaluer périodiquement grâce à un système objectif de notation. L’auto-évaluation prend en compte trois rubriques que sont la gestion de ses ordures produites, l’élimination de ses dispositifs électroniques obsolètes et son action humanitaire vis-à-vis de l’Environnement. Quatre catégories de cibles sont considérées, à savoir, les marchands ambulants, les ouvriers, les femmes de ménage, les étudiants et les professionnels du secteur tertiaire. Après des séances d’autoévaluation, elles obtiennent respectivement 28%, 18%, 40%, 32% et 40%. Ces niveaux d’engagement obtenus s’avèrent faibles et nécessitent la mise en place d’actions promptes et pérennes. Aucun groupe d’individus dans la phase pilote de l’étude n’a été déclaré champion environnemental pour prétendre porter le statut d’Eco-individu

Radiative corrections to the three-body region of the Dalitz plot of baryon semileptonic decays with angular correlation between polarized emitted baryons and charged leptons: The initial-baryon rest frame case

We complement the results for the radiative corrections to the s2.l angular correlation of baryon semileptonic decays of Ref. [1] with the final results in the rest frame of the decaying baryon.Comment: 7 pages, Revtex4, no figure

Portée Et Impact De La Dérivé Sur Les Arthroodes Des Principaux Produits Phytosanitaires Utilises Des Cultures Maraichères Des Niayes Du Sénégal

Abstract:In the northern fringe of the Louga region, when plant protection products are sprayed, a relatively large proportion may be lost to the environment. This could have harmful consequences for the health of operators and biodiversity. The aim is to assess and measure the range of droplets from plant protection product drift treatments in relation to climatic conditions, as well as their impact on health and arthropods. The study is being conducted through a survey of 122 market gardeners and on-farm experimentation.As a result, 81% of the growers surveyed had very clear ideas about the problems associated with spray drift. 67% of growers estimated that 10% of the spray liquid used during spraying ended up in the untreated zone. The study also showed that the potential drift distance applied to the tomato crop with the use of a manual backpack sprayer is 6.875 m. The differences between the arthropods found before and after treatment ranged from 1 to 27 individuals per 0.5 m collection point within the first five metres of drift.In conclusion, knowledge of drift and its extent is very important information in the prevention or reduction the negative impact of the use of plant protection product