17 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

    Biomedizin und MenschenwĂŒrde : Stellungnahmen von Ulrich Eibach, Santiago Ewig, Sabina Laetitia Kowalewski, Volker Herzog, Gerhard Höver, Thomas Sören Hoffmann und Ludger KĂŒhnhardt

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    Die Diskussion um die Folgen biomedizinischer Entwicklungen wird unter dem Betrachtungswinkel unterschiedlicher FakultĂ€ten in ganz Europa und darĂŒber hinaus kontrovers gefĂŒhrt. Im Kern einer kritischen Ausrichtung der Argumente steht die Frage nach den Auswirkungen der Wissenschaften auf die WĂŒrde des Menschen. Vertreter unterschiedlicher Fachrichtungen der Rheinischen Friedrich-Wilhelms-UniversitĂ€t Bonn nehmen in diesem Discussion Paper des Zentrum fĂŒr EuropĂ€ische Integrationsforschung zum Zusammenhang von Biomedizin und MenschenwĂŒrde kritisch Stellung. Sie stellen die Diskussion damit in den Kontext der Suche nach den kĂŒnftigen Koordinaten der europĂ€ischen IdentitĂ€t und des Wertebewußtseins in Europa
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