2,471 research outputs found

    HEP Software Foundation Community White Paper Working Group - Data and Software Preservation to Enable Reuse

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    In this chapter of the High Energy Physics Software Foundation Community Whitepaper, we discuss the current state of infrastructure, best practices, and ongoing developments in the area of data and software preservation in high energy physics. A re-framing of the motivation for preservation to enable re-use is presented. A series of research and development goals in software and other cyberinfrastructure that will aid in the enabling of reuse of particle physics analyses and production software are presented and discussed

    Combined QCD and electroweak analysis of HERA data

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    A simultaneous fit of parton distribution functions (PDFs) and electroweak parameters to HERA data on deep inelastic scattering is presented. The input data are the neutral current and charged current inclusive cross sections which were previously used in the QCD analysis leading to the HERAPDF2.0 PDFs. In addition, the polarisation of the electron beam was taken into account for the ZEUS data recorded between 2004 and 2007. Results on the vector and axial-vector couplings of the Z boson to u- and d-type quarks, on the value of the electroweak mixing angle and the mass of the W boson are presented. The values obtained for the electroweak parameters are in agreement with Standard Model predictions.Comment: 32 pages, 10 figures, accepted by Phys. Rev. D. Small corrections from proofing process and small change to Fig. 12 and Table

    Measurement of the cross-section and charge asymmetry of WW bosons produced in proton-proton collisions at s=8\sqrt{s}=8 TeV with the ATLAS detector

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    This paper presents measurements of the W+μ+νW^+ \rightarrow \mu^+\nu and WμνW^- \rightarrow \mu^-\nu cross-sections and the associated charge asymmetry as a function of the absolute pseudorapidity of the decay muon. The data were collected in proton--proton collisions at a centre-of-mass energy of 8 TeV with the ATLAS experiment at the LHC and correspond to a total integrated luminosity of 20.2~\mbox{fb^{-1}}. The precision of the cross-section measurements varies between 0.8% to 1.5% as a function of the pseudorapidity, excluding the 1.9% uncertainty on the integrated luminosity. The charge asymmetry is measured with an uncertainty between 0.002 and 0.003. The results are compared with predictions based on next-to-next-to-leading-order calculations with various parton distribution functions and have the sensitivity to discriminate between them.Comment: 38 pages in total, author list starting page 22, 5 figures, 4 tables, submitted to EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-13

    Search for chargino-neutralino production with mass splittings near the electroweak scale in three-lepton final states in √s=13 TeV pp collisions with the ATLAS detector

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    A search for supersymmetry through the pair production of electroweakinos with mass splittings near the electroweak scale and decaying via on-shell W and Z bosons is presented for a three-lepton final state. The analyzed proton-proton collision data taken at a center-of-mass energy of √s=13  TeV were collected between 2015 and 2018 by the ATLAS experiment at the Large Hadron Collider, corresponding to an integrated luminosity of 139  fb−1. A search, emulating the recursive jigsaw reconstruction technique with easily reproducible laboratory-frame variables, is performed. The two excesses observed in the 2015–2016 data recursive jigsaw analysis in the low-mass three-lepton phase space are reproduced. Results with the full data set are in agreement with the Standard Model expectations. They are interpreted to set exclusion limits at the 95% confidence level on simplified models of chargino-neutralino pair production for masses up to 345 GeV

    Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at √ s = 8 TeV with the ATLAS detector

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    Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The search uses 20.3 fb−1 of √ s = 8 TeV data collected in 2012 with the ATLAS detector at the LHC. Events are required to have at least one jet with pT > 120 GeV and no leptons. Nine signal regions are considered with increasing missing transverse momentum requirements between Emiss T > 150 GeV and Emiss T > 700 GeV. Good agreement is observed between the number of events in data and Standard Model expectations. The results are translated into exclusion limits on models with either large extra spatial dimensions, pair production of weakly interacting dark matter candidates, or production of very light gravitinos in a gauge-mediated supersymmetric model. In addition, limits on the production of an invisibly decaying Higgs-like boson leading to similar topologies in the final state are presente

    ПРОГРАМНО-МЕТОДИЧНЕ ЗАБЕЗПЕЧЕННЯ ПРОЦЕСУ ФІЗИЧНОГО ВИХОВАННЯ В НАВЧАЛЬНИХ ЗАКЛАДАХ ХЕРСОНСЬКОЇ ГУБЕРНІЇ (1864-1914 РР.)

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    The article is devoted to the study school programs of physical education in high schools of South of Ukraine in the second half of XIX-th – beginning of XX-th century. On example of gymnasiums Kherson province was analyzed programmatic-methodological support to the process of physical education. Concluded that in the pre-revolutionary period there was no unified educational programs of physical education. The main documents that used during the lessons were author programs which compiled by teachers of gymnastics based on various gymnastic systems.Статья посвящена изучению школьных программ по физическому воспитанию в средних учебных заведениях Юга Украины во второй половине ХІХ – начале ХХ вв. На примере гимназий Херсонской губернии проанализировано программно-методическое обеспечение процесса физического воспитания. Сделан вывод, что в дореволюционный период не существовало единой учебной программы по физическому воспитанию. Основными документами, которыми пользовались во время проведения занятий, были авторские программы, составленные учителями гимнастики на основе разных гимнастических систем.Статтю присвячено вивченню шкільних програм із фізичного виховання в середніх навчальних закладах Півдня України в другій половині ХІХ – на початку ХХ ст. На прикладі гімназій Херсонської губернії проаналізовано програмно-методичне забезпечення процесу фізичного виховання. Зроблено висновок, що в дореволюційний період не існувало єдиної навчальної програми з фізичного виховання. Основними документами, якими користувалися під час проведення занять, були авторські програми, укладені вчителями гімнастики на основі різних гімнастичних систем
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