78,256 Works

Search for anomalous couplings in the Higgs sector at LEP

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Anomalous couplings of the Higgs boson are searched for through the processes e+e-→Hγ, e+e -→e+e-H and e+e -→HZ. The mass range 70 GeV

Search for anomalous t t-bar production in the highly-boosted all-hadronic final state

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A search is presented for a massive particle, generically referred to as a Z′, decaying into a tt¯ pair. The search focuses on Z′ resonances that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that are partially or fully merged into single jets. The analysis uses new methods to analyze jet substructure, providing suppression of the non-top multijet backgrounds. The analysis is based on a data sample of proton-proton...

The fully differential decay rate of a Higgs boson to bottom-quarks at NNLO in QCD

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The decay of a light Higgs boson to bottom quarks is dominant and can be exploited for the discovery of the Higgs particle and the measurement of its properties at the LHC and future collider experiments. We perform a first computation of the fully differential decay at next-next-to-leading order in perturbative QCD. We employ a novel method of non-linear mappings for the treatment of singularities in the radiative processes which contribute to the decay width....

Measurement of the inclusive Z cross section via decays to tau pairs in pp collisions at root s=7 TeV

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The first measurement of inclusive Z → τ + τ − production in pp collisions at the LHC is presented, in the final states μ + hadrons, e + hadrons, e + μ, and μ + μ. The data sample corresponds to an integrated luminosity of 36 pb−1 collected with the CMS detector. The measured cross section is σ (pp → ZX) × B (Z → τ + τ −) = 1.00 ± 0.05(stat.) ± 0.08(syst.) ± 0.04(lumi.)nb, which is in good agreement with the next-to-next-to-leading order QCD prediction and improves on previous measurements in the Z → e+e− and μ...

Search for new physics in events with photons, jets, and missing transverse energy in pp collisions at √s=7 TeV

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A search for physics beyond the standard model involving events with one or more photons, jets, and missing transverse energy has been performed by the CMS experiment. The data sample corresponds to an integrated luminosity of 4.93 fb−1 of proton-proton collisions at s√=7 TeV, produced at the Large Hadron Collider. No excess of events with large missing transverse energy is observed beyond expectations from standard model processes, and upper limits on the signal production cross...

Twisted sectors from plane partitions

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Twisted sectors arise naturally in the bosonic higher spin CFTs at their free points, as well as in the associated symmetric orbifolds. We identify the coset representations of the twisted sector states using the description of W∞ representations in terms of plane partitions. We confirm these proposals by a microscopic null-vector analysis, and by matching the excitation spectrum of these representations with the orbifold prediction.

Modeling BSM effects on the Higgs transverse-momentum spectrum in an EFT approach

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We consider the transverse-momentum distribution of a Higgs boson produced through gluon fusion in hadron collisions. At small transverse momenta, the large logarithmic terms are resummed up to next-to-leading-logarithmic (NLL) accuracy. The resummed computation is consistently matched to the next-to-leading-order (NLO) result valid at large transverse momenta. The ensuing Standard Model prediction is supplemented by possible new-physics effects parametrised through three dimension-six operators related to the modification of the top and bottom Yukawa couplings, and...

Accuracy assessment of underwater photogrammetric three dimensional modelling for coral reefs

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Recent advances in automation of photogrammetric 3D modelling software packages have stimulated interest in reconstructing highly accurate 3D object geometry in unconventional environments such as underwater utilizing simple and low-cost camera systems. The accuracy of underwater 3D modelling is affected by more parameters than in single media cases. This study is part of a larger project on 3D measurements of temporal change of coral cover in tropical waters. It compares the accuracies of 3D point...

Integrated laser scanner and intensity image calibration and accuracy assessment

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Nowadays, the use of laser scanner devices as an active technique for acquiring 3D information is growing fast. The huge amount of object points produced with less effort than other 3D acquisition techniques is one of the reasons for interest. For accurate measurements a sophisticated sensor model and calibration procedure is an important prerequisite of such an efficient system. Thecalibration and accuracy assessments of the measurement system reflect the reliability and correctness of the system...

World Summary of αs (2015)

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This is a preliminary update of the measurements of αs and the determination of the world average value of αs (M2Z) presented in the 2013/2014 edition of the Review of Particle Properties.

On loading velocity oscillations during dynamic tensile testing with flying wheel systems

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Flying Wheels (FW) provide a space-saving alternative to Split Hopkinson Bar (SHB) systems for generating the loading pulse for intermediate and high strain rate material testing. This is particularly attractive in view of performing ductile fracture experiments at intermediate strain rates that require a several milliseconds long loading pulse. More than 50 m long Hopkinson bars are required in that case, whereas the same kinetic energy (for a given loading velocity) can be stored in rather...

Up to Date DSM Generation Using High Resolution Satellite Image Data

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Due to the increasing costs of high resolution satellite image data with stereo capabilities, products like accurate DSMs are becoming attractive for more and more users and applications. The Japanese optical sensor ALOS/PRISM which was launched in January 2006 has stereo capabilities by providing a simultaneous acquired image triplet. We have published several results of our evaluation of the potential of ALOS/PRISM image data together with our powerful software packages SAT-PP (Satellite Image Precision Processing)...

Semantic segmentation of aerial images in urban areas with class-specific higher-order cliques

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In this paper we propose an approach to multi-class semantic segmentation of urban areas in high-resolution aerial images with classspecific object priors for buildings and roads. What makes model design challenging are highly heterogeneous object appearances and shapes that call for priors beyond standard smoothness or co-occurrence assumptions. The data term of our energy function consists of a pixel-wise classifier that learns local co-occurrence patterns in urban environments. To specifically model the structure of roads...

How Many Parking Spaces Does a Mobility-on-Demand System Require?

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IODP Expedition 337: Deep Coalbed Biosphere off Shimokita – Microbial processes and hydrocarbon system associated with deeply buried coalbed in the ocean

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The Integrated Ocean Drilling Program (IODP) Expedition 337 was the first expedition dedicated to subseafloor microbiology that used riser-drilling technology with the drilling vessel Chikyu. The drilling Site C0020 is located in a forearc basin formed by the subduction of the Pacific Plate off the Shimokita Peninsula, Japan, at a water depth of 1180 m. Primary scientific objectives during Expedition 337 were to study the relationship between the deep microbial biosphere and a series of  ∼  2 km...

Can broad-band earthquake site responses be predicted by the ambient noise spectral ratio? Insight from observations at two sedimentary basins

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Site-effect assessments performed through earthquake-based approaches, such as the standard spectral ratio (SSR), require good quality records of numerous earthquakes. In contrast, the use of ambient noise appears to be an attractive solution for ease and rapid computation of site responses with sufficient spatial resolution (microzonation), especially in low seismicity areas. Two main approaches are tested here: the horizontal-to-vertical spectral ratio (HVSR) and the noise-based SSR (SSRn). The HVSR uses the relative amplitude of the...

Image- and Model-Based Reconstruction of the Small Buddha of Bamiyan, Afghanistan

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This paper reports about our efforts to generate a 3D computer model of the Small Buddha of Bamiyan, Afghanistan. This was one of two famous standing Buddhas, both of them being destroyed by the Taleban in March 2001. This adds to our previous work on the reconstruction of the Great Buddha and the precise modelling of the larger landscape around it. The main problem here was the lack of one suitable dataset (e.g. old images)...

Extraction of Buildings using Images & Lidar Data and a Combination of Various Methods

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In this work, we focus on the detection of buildings, by combining information from aerial images and Lidar data. We applied four different methods on a dataset located at Zurich Airport, Switzerland. The first method is based on DSM/DTM comparison in combination with NDVI analysis (Method 1). The second one is a supervised multispectral classification refined with a normalized DSM (Method 2). The third approach uses voids in Lidar DTM and NDVI classification (Method 3),...

Maintaining Gait Balance After Perturbations to the Leg: Kinematic and Electromyographic Patterns

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Biosystems & Biorobotics, 22

Recessions as Breadwinner for Forecasters State-Dependent Evaluation of Predictive Ability: Evidence from Big Macroeconomic US Data

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This article re-examines the findings of Stock and Watson (2012b) who assessed the predictive performance of dynamic factor models (DFM) over autoregressive (AR) bench-marks for hundreds of target variables by focusing on possible business cycle performance asymmetries in the spirit of Chauvet and Potter (2013) and Siliverstovs (2017a, 2017b, 2019). Our forecasting experiment is based on a novel big macroeconomic dataset (FRED-QD) comprising over 200 quarterly indicators for almost 60 years (1960-2018; cf. e.g. McCracken...

Processes and Fluxes of Trace Metals in Agricultural Soil-Fertilizer-Plant Systems Investigated with Isotope Applications

Abstract Trace elements occur naturally in soils but are also introduced into soils through human activities. In agroecosystems, fertilizers are applied to soils to promote plant growth. However, as a side effect, trace metals such as cadmium (Cd), copper (Cu), and zinc (Zn) can be introduced into these systems with such fertilizers. Cd is a toxic element for humans and is added to arable soils with P-fertilizer applications. Although Cd is toxic for plants, they...

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