Author
Paul Jackson
Other affiliations: University of Rostock, Politehnica University of Bucharest, University of Birmingham ...read more
Bio: Paul Jackson is an academic researcher from University of Adelaide. The author has contributed to research in topics: Large Hadron Collider & Higgs boson. The author has an hindex of 141, co-authored 1372 publications receiving 93464 citations. Previous affiliations of Paul Jackson include University of Rostock & Politehnica University of Bucharest.
Topics: Large Hadron Collider, Higgs boson, Lepton, Top quark, ATLAS experiment
Papers published on a yearly basis
Papers
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SLAC National Accelerator Laboratory1, University of Bonn2, University of Glasgow3, University of Oslo4, University of Manchester5, University of Calabria6, IFAE7, University of Udine8, University of Trento9, Stony Brook University10, CERN11, Lawrence Berkeley National Laboratory12, Spanish National Research Council13, SINTEF14, University of Bergen15, University of New Mexico16, University of Freiburg17, VTT Technical Research Centre of Finland18, University of Hawaii19, Czech Technical University in Prague20
11 May 2011-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this article, beam tests of 3D silicon pixel sensors aimed at the ATLAS Insertable B-Layer and High Luminosity LHC (HL-LHC) upgrades are presented.
Abstract: Results on beam tests of 3D silicon pixel sensors aimed at the ATLAS Insertable B-Layer and High Luminosity LHC (HL-LHC) upgrades are presented. Measurements include charge collection, tracking efficiency and charge sharing between pixel cells, as a function of track incident angle, and were performed with and without a 1.6 T magnetic field oriented as the ATLAS inner detector solenoid field. Sensors were bump-bonded to the front-end chip currently used in the ATLAS pixel detector. Full 3D sensors, with electrodes penetrating through the entire wafer thickness and active edge, and double-sided 3D sensors with partially overlapping bias and read-out electrodes were tested and showed comparable performance.
29 citations
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TL;DR: In this paper, the authors focus on established firms which use "corporate accelerators" to run fast-moving, competitive programs in which startup companies participate, and identify inhibitors to the collaboration between established firms and startups in these accelerator programs.
Abstract: Open innovation is an innovation framework proposing that established firms use external sources as pathways to new ideas, technologies, business models and markets. Within this framework, established companies can use startups, or young, growth-oriented business to help them achieve radical or breakthrough innovations. In this paper, we focus on established firms which use “corporate accelerators” to run fast-moving, competitive programs in which startup companies participate. Our purpose is to identify inhibitors to the collaboration between established firms and startups in these accelerator programs. We conducted 27 interviews with participants from startups, established companies using startups as innovators, and the accelerator management who provided the platform for this engagement. Our theoretical framework is the social realist theory of Margaret Archer. This provides a conceptualisation of the reflexivity of the participants and the “situational logic” of conflict and competition in which they find themselves. We found that collaboration will be inhibited by conflicts in basic beliefs, or propositions, about concepts such as authority, autonomy and risk, as well as competition for material resources and personal goals.
29 citations
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TL;DR: In this paper, a CP violation analysis of the decay B-+/- -> D pi+pi(-)pi K-0(+/-) branching fraction and decay rate asymmetry is presented.
Abstract: We report the results of a CP violation analysis of the decay B-+/- -> D pi+pi(-)pi K-0(+/-), where D-pi(+)pi(-)pi(0) indicates a neutral D meson detected in the final state pi(+)pi(-)pi(0), excluding K-S(0)pi(0). The analysis makes use of 324x10(6) e(+)e -> B (B) over bar events recorded by the BABAR experiment at the PEP-II e(+)e(-) storage ring. Analyzing the pi(+)pi(-)pi(0) Dalitz plot distribution and the B-+/- -> D-pi(+)pi(-)pi K-0(+/-) branching fraction and decay rate asymmetry, we find the following one-standard-deviation constraints on the amplitude ratio and on the weak and strong phases: 0.06 pi(+)pi(-)pi(0) decay amplitude.
29 citations
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TL;DR: The ATLAS detector is used to search for high-mass states, such as heavy charged gauge bosons (W', W*) decaying to a charged lepton (electron or muon) and a neutrino as mentioned in this paper.
29 citations
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TL;DR: In this article, an adversarial neural network was used to detect the decay of the Higgs Boson to b-quark pairs in the vector boson fusion (VBF) production mode, and the signal strength, defined as the ratio of the measured signal yield to that predicted by the Standard Model for VBF Higgs production, was measured to be 0.95-0.36+0.38.
Abstract: The paper presents a measurement of the Standard Model Higgs Boson decaying to b-quark pairs in the vector boson fusion (VBF) production mode. A sample corresponding to 126 fb - 1 of s=13TeV proton–proton collision data, collected with the ATLAS experiment at the Large Hadron Collider, is analyzed utilizing an adversarial neural network for event classification. The signal strength, defined as the ratio of the measured signal yield to that predicted by the Standard Model for VBF Higgs production, is measured to be 0.95-0.36+0.38 , corresponding to an observed (expected) significance of 2.6 (2.8) standard deviations from the background only hypothesis. The results are additionally combined with an analysis of Higgs bosons decaying to b-quarks, produced via VBF in association with a photon.
29 citations
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TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.
Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …
33,785 citations
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28,685 citations
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TL;DR: In this paper, the authors examined the change in the goodness-of-fit index (GFI) when cross-group constraints are imposed on a measurement model and found that the change was independent of both model complexity and sample size.
Abstract: Measurement invariance is usually tested using Multigroup Confirmatory Factor Analysis, which examines the change in the goodness-of-fit index (GFI) when cross-group constraints are imposed on a measurement model. Although many studies have examined the properties of GFI as indicators of overall model fit for single-group data, there have been none to date that examine how GFIs change when between-group constraints are added to a measurement model. The lack of a consensus about what constitutes significant GFI differences places limits on measurement invariance testing. We examine 20 GFIs based on the minimum fit function. A simulation under the two-group situation was used to examine changes in the GFIs (ΔGFIs) when invariance constraints were added. Based on the results, we recommend using Δcomparative fit index, ΔGamma hat, and ΔMcDonald's Noncentrality Index to evaluate measurement invariance. These three ΔGFIs are independent of both model complexity and sample size, and are not correlated with the o...
10,597 citations
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TL;DR: In this paper, a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) is presented.
Abstract: Deposits of clastic carbonate-dominated (calciclastic) sedimentary slope systems in the rock record have been identified mostly as linearly-consistent carbonate apron deposits, even though most ancient clastic carbonate slope deposits fit the submarine fan systems better. Calciclastic submarine fans are consequently rarely described and are poorly understood. Subsequently, very little is known especially in mud-dominated calciclastic submarine fan systems. Presented in this study are a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) that reveals a >250 m thick calciturbidite complex deposited in a calciclastic submarine fan setting. Seven facies are recognised from core and thin section characterisation and are grouped into three carbonate turbidite sequences. They include: 1) Calciturbidites, comprising mostly of highto low-density, wavy-laminated bioclast-rich facies; 2) low-density densite mudstones which are characterised by planar laminated and unlaminated muddominated facies; and 3) Calcidebrites which are muddy or hyper-concentrated debrisflow deposits occurring as poorly-sorted, chaotic, mud-supported floatstones. These
9,929 citations