21 research outputs found

    Search for dark matter produced in association with bottom or top quarks in √s = 13 TeV pp collisions with the ATLAS detector

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    A search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fb−1 of proton–proton collision data recorded by the ATLAS experiment at √s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour- neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross- section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements

    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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    Measurement of the W boson polarisation in ttˉt\bar{t} events from pp collisions at s\sqrt{s} = 8 TeV in the lepton + jets channel with ATLAS

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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 jet fragmentation in Pb+Pb and pppp collisions at sNN=2.76\sqrt{{s_\mathrm{NN}}} = 2.76 TeV with the ATLAS detector at the LHC

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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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    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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    Search for new phenomena in events containing a same-flavour opposite-sign dilepton pair, jets, and large missing transverse momentum in s=\sqrt{s}= 13 pppp collisions with the ATLAS detector

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    La participation des travailleurs en Italie

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    Giugni Gino. La participation des travailleurs en Italie. In: Revue internationale de droit comparé. Vol. 28 N°4, Octobre-décembre 1976. pp. 727-735

    L'Automne chaud syndical

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    L'auteur qui a collaboré, en qualité d'expert près du Ministre du Travail à la négociation du contrat de la métallurgie en décembre 1969 , montre comment le renforcement de la démocratisation des organisations syndicales et la décentralisation progressive des structures de négociation ont pu modifier le système des relations professionnelles en Italie. Les aspects les plus significatifs de ces transformations sont, d'après lui, la reconnaissance du syndicat au sein de l'entreprise et l'importance accordée à celle-ci comme lieu de négociation. Un dernier trait caractérise le syndicalisme italien : le développement d'actions revendicatives dont l'objet déborde le cadre du travail (logement , santé, transport, retraite) et qui mettent en cause l'autorité politique ; ce qui entraîne non seulement une politisation nouvelle de l'action syndicale mais aussi des rapports nouveaux entre syndicats et partis poli- tiquesGiugni Gino, Hardy Roger. L'Automne chaud syndical. In: Sociologie du travail, 13ᵉ année n°2, Avril-juin 1971. Conflits sociaux et transformations des relations professionnelles en Italie et en France, sous la direction de Marc Maurice . pp. 159-177
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