18 research outputs found

    Measurements of top-quark pair differential cross-sections in the eμe\mu channel in pppp collisions at s=13\sqrt{s} = 13 TeV using the ATLAS detector

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    Search for single production of vector-like quarks decaying into Wb in pp collisions at s=8\sqrt{s} = 8 TeV with the ATLAS detector

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    Search for dark matter in association with a Higgs boson decaying to bb-quarks in pppp collisions at s=13\sqrt s=13 TeV with the ATLAS detector

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    Measurement of the bbb\overline{b} dijet cross section in pp collisions at s=7\sqrt{s} = 7 TeV with the ATLAS detector

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    Charged-particle distributions at low transverse momentum in s=13\sqrt{s} = 13 TeV pppp interactions measured with the ATLAS detector at the LHC

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    Measurement of the charge asymmetry in top-quark pair production in the lepton-plus-jets final state in pp collision data at s=8TeV\sqrt{s}=8\,\mathrm TeV{} with the ATLAS detector

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    ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider

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    Etat des lieux de la contraception d'urgence et ses problématiques chez les adolescents. Enquête auprès de lycéens

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    En France le nombre d IVG, stable depuis sa légalisation, a tendance à augmenter chez les plus jeunes. La contraception d urgence (CU) qui a obtenu l autorisation de mise sur le marché il y a plus de 10 ans est un des moyens utilisés pour diminuer ce nombre d IVG. Cependant, on note une nette sous-utilisation de cette CU malgré les moyens mis en œuvre pour faciliter son accès. Une des principales raisons identifiées à cette sous-utilisation est la méconnaissance de cette dernière. Cette thèse présente les résultats d une enquête faite auprès de lycéens français (dans des lycées généraux et des lycées professionnels), par un questionnaire permettant d identifier leurs lacunes en terme de CU, d identifier les caractéristiques des élèves les mieux informés à ce sujet, et de cibler les sources d information les plus fréquentes et les plus efficaces. Les principaux résultats montrent que les élèves les mieux informés sur la CU sont les filles, les élèves en classe de terminale, ceux appartenant à des lycées généraux, ceux ayant déjà eu des rapports sexuels, et ceux ayant déjà été confrontés à la prise de la CU. Leurs principales lacunes concernent son prix, les lieux où il est possible de se la procurer, l existence de contre-indications ou effets indésirables, et l association à une méthode abortive. Enfin, l école et les médias semblent être les moyens les plus fréquents pour diffuser les informations sur la CU. L ensemble de ces données permettent d élaborer des outils pour améliorer la connaissance des lycéens sur la contraception d urgence, et éviter au mieux une grossesse non désirée chez ces jeunesIn France, the number of abortions that has been stable since its legalization tend to increase among the younges population. Emergency contraception which has obtained the authorization on the market more than 10 years ago is on way to reduce the number of abortions. However, there is as clear under-utilization of this emergency contraception despite an access already facilitated. Ignorance is one of the main reasons identified for this under-utilization. This thesis presents the results of a study conducted among French students (in general high schools and technical high schools) through a survey in order to measure their lack of awareness about emergency contraception, to identify the characteristics of the students who are best informed on this subject, and to target the sources of information that are the most common and most effective ones. The main results show that the best informed students about emergency contraception are girls, final year students, those belonging to general high schools, those who already had sex and those who already used emergency contraception. Their main shortcomings relate to its price, the places where it is possible buy it, the existence of cons-indications or side effects and the association with another abortive method. Finally, school and media seem to be the most common ways to disseminate information about emergency contraception. Thanks to these data, high school students knowledge on emergency contraception can be improved and unwanted pregnancy among young people can be avoided betterST QUENTIN EN YVELINES-BU (782972101) / SudocSudocFranceF

    Search for Scalar Diphoton Resonances in the Mass Range 6560065-600 GeV with the ATLAS Detector in pppp Collision Data at s\sqrt{s} = 8 TeVTeV

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    A search for scalar particles decaying via narrow resonances into two photons in the mass range 65–600 GeV is performed using 20.3fb120.3\text{}\text{}{\mathrm{fb}}^{-1} of s=8TeV\sqrt{s}=8\text{}\text{}\mathrm{TeV} pppp collision data collected with the ATLAS detector at the Large Hadron Collider. The recently discovered Higgs boson is treated as a background. No significant evidence for an additional signal is observed. The results are presented as limits at the 95% confidence level on the production cross section of a scalar boson times branching ratio into two photons, in a fiducial volume where the reconstruction efficiency is approximately independent of the event topology. The upper limits set extend over a considerably wider mass range than previous searches
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