3,168 research outputs found
Searches for and with
The associated production of a Higgs boson with a top quark-antiquark pair
( production) or with a single top quark
( production) allows a direct measurement of the top-Higgs-Yukawa
coupling with minimal model dependence. In this article, recent results of
searches for and production in the
channel performed by the ATLAS and
CMS experiments are reviewed. The analyses use pp collision data collected at a
centre-of-mass energy of 13TeV corresponding to an integrated luminosity of
up to 13.2fb.Comment: TOP2016 conferenc
Bounded time computation on metric spaces and Banach spaces
We extend the framework by Kawamura and Cook for investigating computational
complexity for operators occurring in analysis. This model is based on
second-order complexity theory for functions on the Baire space, which is
lifted to metric spaces by means of representations. Time is measured in terms
of the length of the input encodings and the required output precision. We
propose the notions of a complete representation and of a regular
representation. We show that complete representations ensure that any
computable function has a time bound. Regular representations generalize
Kawamura and Cook's more restrictive notion of a second-order representation,
while still guaranteeing fast computability of the length of the encodings.
Applying these notions, we investigate the relationship between purely metric
properties of a metric space and the existence of a representation such that
the metric is computable within bounded time. We show that a bound on the
running time of the metric can be straightforwardly translated into size bounds
of compact subsets of the metric space. Conversely, for compact spaces and for
Banach spaces we construct a family of admissible, complete, regular
representations that allow for fast computation of the metric and provide short
encodings. Here it is necessary to trade the time bound off against the length
of encodings
Representing Probability Measures using Probabilistic Processes
In the Type-2 Theory of Effectivity, one considers representations of topological spaces in which infinite words are used as “names ” for the elements they represent. Given such a representation, we show that probabilistic processes on infinite words generate Borel probability measures on the represented space. Conversely, for several well-behaved types of space, every Borel probability measure is represented by a corresponding probabilistic process. Accordingly, we consider probabilistic processes as providing “probabilistic names ” for Borel probability measures. We show that integration is computable with respect to the induced representation of measures.
Structural similarity between dry and wet sphere packings
The mechanical properties of granular materials change significantly in the
presence of a wetting liquid which creates capillary bridges between the
particles. Here we demonstrate, using X-ray tomographies of dry and wet sphere
packings, that this change in mechanical properties is not accompanied by
structural differences between the packings. We characterize the latter by the
average numbers of contacts of each sphere and the shape
isotropy of the Voronoi cells of the particles.
Additionally, we show that the number of liquid bridges per sphere is approximately equal to , independent of the
volume fraction of the packing. These findings will be helpful in guiding the
development of both particle-based models and continuum mechanical descriptions
of wet granular matter.Comment: slightly revised versio
The effect of saving subsidies on household saving: Evidence from Germany
Since 2002 the German government seeks to stimulate private retirement savings by means of special allowances and tax exemptions - the so-called Riester scheme. We apply matching and panel regression techniques to assess the impact of the Riester scheme on households' propensities to save in a natural experiment framework. Estimation results from both the German Socio-Economic Panel and the SAVE study indicate that private saving was hardly affected by the introduction of the Riester scheme. --Household saving,Saving incentives,Retirement,Riester scheme,Coarsened exact matching
The Eff ect of Saving Subsidies on Household Saving – Evidence from Germanys
Since 2002 the German government seeks to stimulate private retirement savings by means of special allowances and tax exemptions – the so-called Riester scheme. We apply matching and panel regression techniques to assess the impact of the Riester scheme on households’ propensities to save in a natural experiment framework. Estimation results from both the German Socio-Economic Panel and the SAVE study indicate that private saving was hardly aff ected by the introduction of the Riester scheme.Household saving; saving incentives; retirement; Riester scheme; coarsened exact matching
Can governments boost voluntary retirement savings via tax incentives and subsidies? A German case study for low-income households
Since 2002 the German government has promoted private retirement saving plans by means of special subsidies and tax incentives (Riester scheme). This policy mainly targets low-income households. Using data from the German Socio-economic Panel, we scrutinize the impact of the Riester scheme on private savings. Our empirical strategy consists of treating the introduction of the Riester scheme as a natural experiment. The estimation results cast some doubts on the effectiveness of the Riester scheme in raising private savings and call for enhanced systematic efforts to evaluate that policy. --retirement saving,Riester scheme,tax incentives,subsidy incentives,pensions,treatment analysis
- …