Search for ttˉHt\bar{t}H and tHtH production with H→γγH\to \gamma \gamma at s\sqrt{s} = 13 TeV with the ATLAS experiment

The measurement of the Yukawa coupling of the top quark is one important goal of particle physics after the discovery of the Higgs boson. There are two processes that offer the possibility to directly measure the Yukawa coupling of the top quark at the LHC. These are the production of a top-antitop-quark pair in association with a Higgs boson via the strong interaction ($t\bar{t}H$) and the electroweak production of a single top quark and a Higgs boson ($tH$). In the Standard Model, the cross section for $tH$ production is much smaller than the cross section for $t\bar{t}H$ production as there is a destructive interference between diagrams where the Higgs boson is radiated off a top quark and diagrams where it is radiated off a $W$ boson. Despite the reduced cross section, this interference provides additional sensitivity to the sign of the Yukawa coupling. The considered Higgs boson decay into photons is promising due to the good energy resolution of the photons and the relatively small backgrounds. But it is also challenging due to the small branching ratio. The analysis strategy and the latest results on the search for $t\bar{t}H/tH$ production in the diphoton channel at the ATLAS experiment are presented.Comment: 4 pages, 2 figures, TOP2017 conferenc

Castelnuovo-Mumford regularity of seminormal simplicial affine semigroup rings

We show that the Eisenbud-Goto conjecture holds for (homogeneous) seminormal simplicial affine semigroup rings. Moreover, we prove an upper bound for the Castelnuovo-Mumford regularity in terms of the dimension, which is similar as in the normal case. Finally, we compute explicitly the regularity of full Veronese rings.Comment: Minor revision

Study on methods to analyse the impact of state aid on competition

One of the potential benefits of an economic approach to State aid control is to make relationships between the costs and the benefits of State aid more transparent and, by doing so, to provide guidance on how to focus State aid control efforts on those areas where the damage of State aid is the greatest. Where markets fail to deliver efficient outcomes, Government intervention, including the provision of State aid, can improve welfare. This is an accepted result in the economic literature. Many national or supra-national bodies do not provide a mechanism to monitor and discipline the State aid provided by its members. Indeed, the control of State aid in the European Union stands out.state aid, government intervention, market failure, policy evaluation, Nitsche, Heidhues

Overcoming Barriers in Supply Chain Analytics—Investigating Measures in LSCM Organizations

While supply chain analytics shows promise regarding value, benefits, and increase in performance for logistics and supply chain management (LSCM) organizations, those organizations are often either reluctant to invest or unable to achieve the returns they aspire to. This article systematically explores the barriers LSCM organizations experience in employing supply chain analytics that contribute to such reluctance and unachieved returns and measures to overcome these barriers. This article therefore aims to systemize the barriers and measures and allocate measures to barriers in order to provide organizations with directions on how to cope with their individual barriers. By using Grounded Theory through 12 in-depth interviews and Q-Methodology to synthesize the intended results, this article derives core categories for the barriers and measures, and their impacts and relationships are mapped based on empirical evidence from various actors along the supply chain. Resultingly, the article presents the core categories of barriers and measures, including their effect on different phases of the analytics solutions life cycle, the explanation of these effects, and accompanying examples. Finally, to address the intended aim of providing directions to organizations, the article provides recommendations for overcoming the identified barriers in organizations