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

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

The Path to the ‘Socialist Village’: Collectivisation of Agriculture and Changes in Everyday Life in the Thuringian Village Merxleben

At the Institute of German and comparative Folkloristic Studies at the University of Munich/Germany a research project was conducted that studied the everyday culture of a ‘socialist village’. It was planned as a comparative study of two socialist countries, the former GDR and Bulgaria. It became a case study of a Thuringian village (Merxleben) that relates the everyday life of its inhabitants to the agricultural politics and tries to work out the reciprocal influences on each other. Central events of agricultural politics were dominating the changes of everyday life: the land reform of 1945, the beginning of collectivisation in 1952, and finally the forced collectivisation of all still privately owned farms in 1960. The people of the village had to confront themselves with the normative political measures according to their possibilities, viewpoints, their social background and their future expectations in a political situation that was believed to be irreversible. One group and single people supported the measures, another group tried to slow them down. Finally, the agricultural-political objectives were met: the land was socialised, the production highly industrialised. Nevertheless the reality in Merxleben stayed far behind the highly demanding expectations, because the actors had not reflected the industrial workers in their habits, working and living conditions – the difference between city and country life had not been abolished.At the Institute of German and comparative Folkloristic Studies at the University of Munich/Germany a research project was conducted that studied the everyday culture of a ‘socialist village’. It was planned as a comparative study of two socialist countries, the former GDR and Bulgaria. It became a case study of a Thuringian village (Merxleben) that relates the everyday life of its inhabitants to the agricultural politics and tries to work out the reciprocal influences on each other. Central events of agricultural politics were dominating the changes of everyday life: the land reform of 1945, the beginning of collectivisation in 1952, and finally the forced collectivisation of all still privately owned farms in 1960. The people of the village had to confront themselves with the normative political measures according to their possibilities, viewpoints, their social background and their future expectations in a political situation that was believed to be irreversible. One group and single people supported the measures, another group tried to slow them down. Finally, the agricultural-political objectives were met: the land was socialised, the production highly industrialised. Nevertheless the reality in Merxleben stayed far behind the highly demanding expectations, because the actors had not reflected the industrial workers in their habits, working and living conditions – the difference between city and country life had not been abolished