Hello, Goodbye. Bertelsmann Stiftung eupinions brief | January 2020

As the United Kingdom is leaving the European Union all eyes are on the eminent economic effects and future trade negotiations. How the British people feel about the state of their country at this defining moment of their political history has received less attention. In this eupinions brief, we examine how British citizens evaluate the state of their national democracy and the direction of their home country. We also ask what they expect for their personal lives

Je t’aime. Moi non plus = I love you. Neither do I. eupinions brief | February 2019

When Emmanuel Macron won the French presidential election with a risky strategy and against all odds in May 2017, spring seemed to break out in Paris. New faces, new dynamics, and the promise to do many things differently and thus better, were in the air and inspired large swathes of the French public. But the protests of the "yellow vests" have in their intensity and perseverance now shaken the last optimist. And they’ve reminded us of how deep the trenches between the political interests in France are – as well as how much energy and effort it takes to navigate them

We’ll be fine. How People in the EU27 View Brexit. eupinions brief | February 2019

The political drama called Brexit leaves observers in London fascinated, appalled or exhausted. Whereas in the UK, the tension seems to intensify with every twist and turn the British take on their way out of the European Union, Europeans on the continent seem to be surprisingly detached. They support their country’s membership in the EU in ever greater numbers, and calmly carry on with their daily business. Don’t they think that they will be affected by Brexit? We decided to ask the

Neutrinoless double beta decay in chiral effective field theory: lepton number violation at dimension seven

We analyze neutrinoless double beta decay ($0\nu\beta\beta$) within the framework of the Standard Model Effective Field Theory. Apart from the dimension-five Weinberg operator, the first contributions appear at dimension seven. We classify the operators and evolve them to the electroweak scale, where we match them to effective dimension-six, -seven, and -nine operators. In the next step, after renormalization group evolution to the QCD scale, we construct the chiral Lagrangian arising from these operators. We develop a power-counting scheme and derive the two-nucleon $0\nu\beta\beta$ currents up to leading order in the power counting for each lepton-number-violating operator. We argue that the leading-order contribution to the decay rate depends on a relatively small number of nuclear matrix elements. We test our power counting by comparing nuclear matrix elements obtained by various methods and by different groups. We find that the power counting works well for nuclear matrix elements calculated from a specific method, while, as in the case of light Majorana neutrino exchange, the overall magnitude of the matrix elements can differ by factors of two to three between methods. We calculate the constraints that can be set on dimension-seven lepton-number-violating operators from $0\nu\beta\beta$ experiments and study the interplay between dimension-five and -seven operators, discussing how dimension-seven contributions affect the interpretation of $0\nu\beta\beta$ in terms of the effective Majorana mass $m_{\beta \beta}$.Comment: Matches version published in JHE

Open Transactions on Shared Memory

Transactional memory has arisen as a good way for solving many of the issues of lock-based programming. However, most implementations admit isolated transactions only, which are not adequate when we have to coordinate communicating processes. To this end, in this paper we present OCTM, an Haskell-like language with open transactions over shared transactional memory: processes can join transactions at runtime just by accessing to shared variables. Thus a transaction can co-operate with the environment through shared variables, but if it is rolled-back, also all its effects on the environment are retracted. For proving the expressive power of TCCS we give an implementation of TCCS, a CCS-like calculus with open transactions

Deuteron Magnetic Quadrupole Moment From Chiral Effective Field Theory

We calculate the magnetic quadrupole moment (MQM) of the deuteron at leading order in the systematic expansion provided by chiral effective field theory. We take into account parity and time-reversal violation which, at the quark-gluon level, results from the QCD vacuum angle and dimension-six operators that originate from physics beyond the Standard Model. We show that the deuteron MQM can be expressed in terms of five low-energy constants that appear in the parity- and time-reversal-violating nuclear potential and electromagnetic current, four of which also contribute to the electric dipole moments of light nuclei. We conclude that the deuteron MQM has an enhanced sensitivity to the QCD vacuum angle and that its measurement would be complementary to the proposed measurements of light-nuclear EDMs

Great expectations The New European Commission, its Ambition and European Public Opinion. eupinions 2019/2

The Eurozone crisis has pushed reform of the European Union (EU) to the forefront of political debate. How can a Union of 28 states with a population of over half a billion be reformed to weather future economic crises and political challenges? Finding an answer to this question is extremely difficult not only because current reform proposals are so varied, but even more so because we lack insights into the preferences for reform amongst national elites and publics. Although EU support has interested scholars for over three decades now, we virtually know nothing about public support for EU reform. Current research focuses almost exclusively on the causes of support for the current project and fails to provide a sufficient basis for effective reform decisions. Surely, the feasibility and sustainability of EU reform crucially hinges on the support amongst national publics. eupinions examines public support for EU reform by developing a theoretical model and employing cutting-edge data collection techniques. Our findings will aid policy makers to craft EU reform proposals that can secure widespread public support

Self-reported energy intake by FFQ compared with actual energy intake to maintain body weight in 516 adults

It is generally assumed that a FFQ is not suitable to estimate the absolute levels of individual energy intake. However, in epidemiological studies, reported nutrients by FFQ are often corrected for this intake. The objective of the present study was to assess how accurately participants report their energy intakes by FFQ. We compared reported energy intake with actual energy intake needed to maintain stable body weights during eleven controlled dietary trials. FFQ were developed to capture at least 90 % of energy intake. Participants, 342 women and 174 men, with a mean BMI of 22·8 (sd 3·1) kg/m2 filled out the FFQ just before the trials. Energy intakes during the trials were calculated from provided foods and reported free-food items, representing 90 and 10 % of energy intake, respectively. Mean reported energy intake was 97·5 (sd 12·7) % of actual energy intake during the trials; it was 98·9 (sd 15·2) % for women and 94·7 (sd 16·3) % for men (P = 0·004 for difference between sexes). Correlation coefficients between reported and actual energy intakes were 0·82 for all participants, 0·74 for women and 0·80 for men. Individual reported energy intake as a percentage of actual intake ranged from 56·3 to 159·6 % in women and from 43·8 to 151·0 % in men. In conclusion, the FFQ appeared to be accurate for estimating the mean level of energy intakes of these participants and for ranking them according to their intake. However, the large differences found on the individual level may affect the results of epidemiological studies in an unknown direction if nutrients are corrected for energy intakes reported by FF

Five minutes with Catherine de Vries: “The left is now split over whether they simply oppose the EU’s policies or oppose what the EU stands for overall”

How has opposition to the European Union changed in light of the Greek debt crisis, the UK’s planned referendum on EU membership, and the migration crisis in the Mediterranean? In an interview with EUROPP’s editor Stuart Brown, Catherine de Vries discusses the impact the UK’s referendum might have on the continent, the nature of left-wing Euroscepticism, and why immigration remains the most important issue for David Cameron in his efforts to reach a deal on EU reform