Gewalt in der Schule

Vortrag auf der Tagung Bindung, Trauma und soziale Gewalt , 3.-5.12.2004 in Frankfurt am Main

Search for heavy gauge W ' bosons in events with an energetic lepton and large missing transverse momentum at root s=13TeV

Peer reviewe

Search for high-mass resonances in final states with a lepton and missing transverse momentum at root s=13 TeV

A search for new high-mass resonances in proton-proton collisions having final states with an electron or muon and missing transverse momentum is presented. The analysis uses proton-proton collision data collected in 2016 with the CMS detector at the LHC at a center-of-mass energy of 13TeV, corresponding to an integrated luminosity of 35.9 fb(-1). The transverse mass distribution of the charged lepton-neutrino system is used as the discriminating variable. No significant deviation from the standard model prediction is found. The best limit, from the combination of electron and muon channels, is 5.2TeV at 95% confidence level for the mass of a W' boson with the same couplings as those of the standard model Wboson. Exclusion limits of 2.9TeV are set on the inverse radius of the extra dimension in the framework of split universal extra dimensions. In addition, model-independent limits are set on the production cross section and coupling strength of W' bosons decaying into this final state. An interpretation is also made in the context of an R parity violating supersymmetric model with a slepton as a mediator and flavor violating decay.Peer reviewe

Search for heavy gauge W ′ bosons in events with an energetic lepton and large missing transverse momentum at √s = 13 TeV

A search is presented for W′ bosons in events with an electron or muon and large missing transverse momentum, using proton–proton collision data at √s=13 TeV collected with the CMS detector in 2015 and corresponding to an integrated luminosity of 2.3 fb−1. No evidence of an excess of events relative to the standard model expectations is observed. For a W′ boson described by the sequential standard model, upper limits at 95% confidence level are set on the product of the production cross section and branching fraction and lower limits are established on the new boson mass. Masses below 4.1 TeV are excluded combining electron and muon decay channels, significantly improving upon the results obtained with the 8 TeV data. Exclusion limits at 95% confidence level on the product of the W′ production cross section and branching fraction are also derived in combination with the 8 TeV data. Finally, exclusion limits are set for the production of generic W′ bosons decaying into this final state using a model-independent approach

Search for high-mass resonances in final states with a lepton and missing transverse momentum at s=13 \sqrt{s}=13 TeV

A search for new high-mass resonances in proton-proton collisions having final states with an electron or muon and missing transverse momentum is presented. The analysis uses proton-proton collision data collected in 2016 with the CMS detector at the LHC at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb −1 . The transverse mass distribution of the charged lepton-neutrino system is used as the discriminating variable. No significant deviation from the standard model prediction is found. The best limit, from the combination of electron and muon channels, is 5.2 TeV at 95% confidence level for the mass of a W′ boson with the same couplings as those of the standard model W boson. Exclusion limits of 2.9 TeV are set on the inverse radius of the extra dimension in the framework of split universal extra dimensions. In addition, model-independent limits are set on the production cross section and coupling strength of W′ bosons decaying into this final state. An interpretation is also made in the context of an R parity violating supersymmetric model with a slepton as a mediator and flavor violating decay

Auswirkungen der Wirtschaftskrise in Deutschland und den Niederlanden aus Sicht der Beschäftigten

Obwohl die Krise in den Niederlanden vergleichsweise mehr Betriebe erfasst hat als in Deutschland, stellen Beschäftigte dort seltener Personalmaßnahmen sowie krisenbedingte Einkommensverluste fest. Dies ist ein Ergebnis eines Zwei-Ländervergleichs zu den Auswirkungen der jüngsten Wirtschaftskrise, der - anders als in den meisten vorliegenden Studien - die Einschätzung der Beschäftigten selbst zum Ausgangspunkt der Analyse macht. Grundlage ist ein Datensatz, der auf einer in den Niederlanden wie in Deutschland parallel durchgeführten Online-Erhebung basiert. Sie wurde im Rahmen des internationalen WageIndicator-Projekts durchgeführt

Employees’ experiences of the impact of the economic crisis in 2009 and 2010: A German-Dutch comparison

Few studies have researched the impact of the 2008-2009 economic crisis on organisations’ adjustment behaviour in Germany and the Netherlands. Using large-scale data from an employee web-survey running from 2009/08 to 2010/11, this paper investigates the likelihood that German and Dutch employees work for a crisis-hit organisation. The likelihood of labour hoarding or downward adjustments of the permanent or flexible workforce in crisis-hit organisations is studied, as is the likelihood of downward adjustments in basic wages or benefits. The results show that such effects occur in large firms and the manufacturing industry much more often, that women are more likely to be working in a crisis-hit organisation but less likely to be facing any of the adjustments, that education hardly matters and that elderly workers face many more adjustments than younger workers