TY - JOUR T1 - Search for pair production of Higgs bosons in the \({bb̅bb̅}\) final state using proton-proton collisions at root s=13 TeV with the ATLAS detector JF - Journal of High Energy Physics N2 - A search for Higgs boson pair production in the bbbb final state is carried out with up to 36.1 fb(-1) of LHC proton-proton collision data collected at s=13 TeV with the ATLAS detector in 2015 and 2016. Three benchmark signals are studied: a spin-2 graviton decaying into a Higgs boson pair, a scalar resonance decaying into a Higgs boson pair, and Standard Model non-resonant Higgs boson pair production. Two analyses are carried out, each implementing a particular technique for the event reconstruction that targets Higgs bosons reconstructed as pairs of jets or single boosted jets. The resonance mass range covered is 260-3000 GeV. The analyses are statistically combined and upper limits on the production cross section of Higgs boson pairs times branching ratio to bbbb are set in each model. No significant excess is observed; the largest deviation of data over prediction is found at a mass of 280 GeV, corresponding to 2.3 standard deviations globally. The observed 95% confidence level upper limit on the non-resonant production is 13 times the Standard Model prediction. KW - Hadron-Hadron scattering (experiments) KW - ++ KW - LHC Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-226001 VL - 30 ER - TY - JOUR T1 - Measurement of the Soft-Drop Jet Mass in \({pp}\) Collisions at root s=13 TeV with the ATLAS Detector JF - Physical Review Letters N2 - Jet substructure observables have significantly extended the search program for physics beyond the standard model at the Large Hadron Collider. The state-of-the-art tools have been motivated by theoretical calculations, but there has never been a direct comparison between data and calculations of jet substructure observables that are accurate beyond leading-logarithm approximation. Such observables are significant not only for probing the collinear regime of QCD that is largely unexplored at a hadron collider, but also for improving the understanding of jet substructure properties that are used in many studies at the Large Hadron Collider. This Letter documents a measurement of the first jet substructure quantity at a hadron collider to be calculated at next-to-next-to-leading-logarithm accuracy. The normalized, differential cross section is measured as a function of log(10)rho(2), where rho is the ratio of the soft-drop mass to the ungroomed jet transverse momentum. This quantity is measured in dijet events from 32.9 fb(-1) of root s = 13 TeV proton-proton collisions recorded by the ATLAS detector. The data are unfolded to correct for detector effects and compared to precise QCD calculations and leading-logarithm particle-level Monte Carlo simulations. KW - Algorithm Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-220694 VL - 121 IS - 9 ER - TY - JOUR T1 - Search for dark matter produced in association with bottom or top quarks in root s=13 TeV \({pp}\) collisions with the ATLAS detector JF - European Physical Journal C N2 - A search for weakly interacting massive dark matter particles produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and missing transverse momentum are considered. The analysis uses 36.1 fb(-1) of proton proton collision data recorded by the ATLAS experiment at root s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are interpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour-neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross-section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour-charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements. KW - Production Cross-Section KW - Pair Prodution KW - Parton Distributions KW - Hadron Colliders KW - Measuring Masses KW - LHC Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-225937 VL - C 78 IS - 18 ER - TY - BOOK ED - Keul, Hildegund T1 - UnSichtbar : Interdisziplinäre Stimmen zu Vulnerabilität, Vulneranz und Menschenrechten N2 - Wo etwas Verborgenes, das vom öffentlichen Diskurs ausgeschlossen wurde, plötzlich sichtbar wird, ereignen sich Offenbarungen. Wenn es dabei um Menschenrechte geht, so entsteht ein prekärer Augenblick, der große Chancen und zugleich unübersehbare Risiken birgt. Verworfenes Leben kann sich Bahn brechen; oder es wird durch schmerzliche Vulneranz erneut verfemt und zerstört. In Verwundungen, die an der Schwelle des UnSichtbaren geschehen, tritt die Vulnerabilität der Menschenrechte hervor. Das vorliegende Buch erscheint 2023 und damit 75 Jahre nach der "Allgemeinen Erklärung der Menschenrechte" der Vereinten Nationen. Menschenrechte sind eine gegen viele Widerstände und mit großen Opfern durchgesetzte Errungenschaft der Menschheit. Heute werden sie erneut zu einem verletzten und verletzbaren Gut. Daher analysiert das Buch die ambivalente Macht der Vulnerabilität an signifi kanten Diskursorten der Gegenwart; es legt die Vulneranz der katholischen Kirche bezüglich Missbrauch, Vertuschung und Gendertrouble frei; und es fragt nach der offenbarenden Kraft an jener Schwelle, wo die Menschenrechte in Gefahr sind. Mit Beiträgen von Prof. Dr. Stephan Lessenich, Dr. Sabine Bauer-Amin, Florian Pistrol, Steven Höfner, Prof. Dr. Ute Leimgruber, Prof. Dr. Hildegund Keul, Dr. Andreas Heek, Prof. Dr. Peter G. Kirchschläger, Dr. Jutta Czapski, Prof. Dr. Ansgar Kreutzer. KW - Vulnerabilität KW - Vulneranz KW - menschliche Gewaltsamkeit KW - Verwundbarkeit der Menschenrechte KW - Machtmissbrauch KW - Resilienz Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-322810 SN - 978-3-95826-202-7 SN - 978-3-95826-203-4 N1 - Parallel erschienen als Druckausgabe bei Würzburg University Press, ISBN 978-3-95826-202-7, 36,90 Euro. PB - Würzburg University Press CY - Würzburg ER - TY - JOUR T1 - Measurements of differential cross sections of top quark pair production in association with jets in pp collisions at root s=13 TeV using the ATLAS detector JF - Journal of High Energy Physics N2 - Measurements of di ff erential cross sections of top quark pair production in association with jets by the ATLAS experiment at the LHC are presented. The measurements are performed as functions of the top quark transverse momentum, the transverse momentum of the top quark-antitop quark system and the out-of-plane transverse momentum using data from pp collisions at p s = 13TeV collected by the ATLAS detector at the LHC in 2015 and corresponding to an integrated luminosity of 3.2 fb. The top quark pair events are selected in the lepton (electron or muon) + jets channel. The measured cross sections, which are compared to several predictions, allow a detailed study of top quark production. KW - Hadron-Hadron scattering (experiments) KW - Jets KW - Top physics KW - Parton Distributions KW - ++ Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-226023 VL - 159 IS - 10 ER - TY - JOUR T1 - Search for flavour-changing neutral current top-quark decays \(t\) -> \({qZ}\) in proton-proton collisions at root s=13 TeV with the ATLAS detector JF - Journal of High Energy Physics N2 - A search for flavour-changing neutral-current processes in top-quark decays is presented. Data collected with the ATLAS detector from proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of root s = 13TeV, corresponding to an integrated luminosity of 36.1 fb(-1), are analysed. The search is performed using top-quark pair events, with one top quark decaying through the t -> qZ (q = u, c) flavour-changing neutral-current channel, and the other through the dominant Standard Model mode t -> bW. Only Z boson decays into charged leptons and leptonic W boson decays are considered as signal. Consequently, the final-state topology is characterized by the presence of three isolated charged leptons (electrons or muons), at least two jets, one of the jets originating from a b-quark, and missing transverse momentum from the undetected neutrino. The data are consistent with Standard Model background contributions, and at 95% confidence level the search sets observed (expected) upper limits of 1.7 x 10(-4) (2.4 x 10(-4)) on the t -> uZ branching ratio and 2.4 x 10(-4) (3.2 x 10(-4)) on the t -> cZ branching ratio, constituting the most stringent limits to date. KW - Hadron-Hadron scattering (experiments) KW - Parton Distributions KW - ++ KW - Pair-Production KW - Cross-Section KW - Physics KW - Models Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-226114 VL - 176 IS - 7 ER - TY - JOUR T1 - Measurement of the production cross section of three isolated photons in \({pp}\) collisions at root \(s\)=8 TeV using the ATLAS detector JF - Physics Letters B N2 - A measurement of the production of three isolated photons in proton-proton collisions at a centre-of-mass energy root s = 8 TeV is reported. The results are based on an integrated luminosity of 20.2 fb(-1) collected with the ATLAS detector at the LHC. The differential cross sections are measured as functions of the transverse energy of each photon, the difference in azimuthal angle and in pseudorapidity between pairs of photons, the invariant mass of pairs of photons, and the invariant mass of the triphoton system. A measurement of the inclusive fiducial cross section is also reported. Next-to-leading-order perturbative QCD predictions are compared to the cross-section measurements. The predictions underestimate the measurement of the inclusive fiducial cross section and the differential measurements at low photon transverse energies and invariant masses. They provide adequate descriptions of the measurements at high values of the photon transverse energies, invariant mass of pairs of photons, and invariant mass of the triphoton system. (C) 2018 The Author. Published by Elsevier B.V. KW - Parton Distributions KW - Hierarchy KW - Quark Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-226154 VL - 781 ER - TY - CHAP ED - Pechtl, Joachim ED - Link, Thomas ED - Husty, Ludwig T1 - Neue Materialien des Bayerischen Neolithikums - Tagung im Kloster Windberg vom 21. bis 23. November 2014 T1 - New Material of the Bavarian Neolithic - Conference at Windberg monastery november 21st to 23rd 2014 T2 - Würzburger Studien zur Vor- und Frühgeschichtlichen Archäologie N2 - Unter dem Titel "Neue Materialien des Bayerischen Neolithikums" fand vom 21. bis 23. November 2014 im Kloster Windberg bei Straubing eine Tagung statt, bei der neue, bislang unpublizierte jung-steinzeitliche Fundkomplexe vorgestellt und diskutiert wurden, die aus allen Landesteilen des Freistaats Bayern stammten und zeitlich den Bogen von der Linienbandkeramik bis zu den Becherkulturen spannten. Mit einer diachronen und Regionen übergreifenden Betrachtung charakteristischer Inventare aus den verschiedenen Landschaftsräumen und Zeitabschnitten wurde das Ziel verfolgt, neues Material zu erschließen und damit die Quellenbasis für die archäologische Forschung zu erweitern sowie der Neolithforschung in Bayern neue Impulse zu geben. Im vorliegenden Band sind neun der Vorträge dieser Tagung zusammen gestellt. T3 - Würzburger Studien zur Vor- und Frühgeschichtlichen Archäologie - 2 KW - Bayern KW - Neolithikum KW - Archaeology KW - Prehistory KW - Neolithic KW - Conference KW - Bavaria KW - Archäologie KW - Vor- und Frühgeschichte KW - Tagung Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-139407 SN - 978-3-95826-044-3 (print) SN - 978-3-95826-045-0 (online) SN - 2367-0681 (print) SN - 2367-069X (online) N1 - Parallel erschienen als Druckausgabe in Würzburg University Press, ISBN 978-3-95826-044-3, 29,80 EUR PB - Würzburg University Press CY - Würzburg ER - TY - CHAP ED - Husty, Ludwig ED - Link, Thomas ED - Pechtl, Joachim T1 - Neue Materialien des Bayerischen Neolithikums 2 - Tagung im Kloster Windberg vom 18. bis 20. November 2016 T1 - New Material of the Bavarian Neolithic - Conference at Windberg monastery november 18th to 20th 2016 N2 - Vom 18. bis 20. November 2016 fand im Kloster Windberg bei Straubing zum zweiten Mal nach 2014 eine Tagung unter dem Titel "Neue Materialien des Bayerischen Neolithikums" statt. Dabei wurden neue, bislang unpublizierte Fundkomplexe vorgestellt und diskutiert, die alle Phasen der Jungsteinzeit vom Altneolithikum bis zum Endneolithikum abdeckten und die aus verschiedenen Landesteilen des Freistaats Bayern sowie aus dem benachbarten Oberschwaben stammten. Mit einer diachronen und Regionen übergreifenden Betrachtung charakteristischer Inventare aus den verschiedenen Landschaftsräumen und Zeitabschnitten wurde das Ziel verfolgt, neues Material zu erschließen und damit die archäologische Quellenbasis zu erweitern und der Neolithforschung in Bayern neue Impulse zu geben. Im vorliegenden Band sind acht der Vorträge dieser Tagung zusammen gestellt. T3 - Würzburger Studien zur Vor- und Frühgeschichtlichen Archäologie - 3 KW - Archäologie KW - Bayern KW - Neolithikum KW - Tagung KW - Vor- und Frühgeschichte KW - Archaeology KW - Bavaria KW - Conference KW - Neolithic KW - Prehistory Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-168688 SN - 978-3-95826-098-6 (Print) SN - 978-3-95826-099-3 (Online) SN - 2367-0681 SN - 2367-069X N1 - Parallel erschienen als Druckausgabe in Würzburg University Press, ISBN 978-3-95826-098-6, 32,90 EUR PB - Würzburg University Press CY - Würzburg ET - 1. Auflage ER - TY - RPRT ED - Hoßfeld, Tobias ED - Wunderer, Stefan T1 - White Paper on Crowdsourced Network and QoE Measurements – Definitions, Use Cases and Challenges N2 - The goal of the white paper at hand is as follows. The definitions of the terms build a framework for discussions around the hype topic ‘crowdsourcing’. This serves as a basis for differentiation and a consistent view from different perspectives on crowdsourced network measurements, with the goal to provide a commonly accepted definition in the community. The focus is on the context of mobile and fixed network operators, but also on measurements of different layers (network, application, user layer). In addition, the white paper shows the value of crowdsourcing for selected use cases, e.g., to improve QoE or regulatory issues. Finally, the major challenges and issues for researchers and practitioners are highlighted. This white paper is the outcome of the Würzburg seminar on “Crowdsourced Network and QoE Measurements” which took place from 25-26 September 2019 in Würzburg, Germany. International experts were invited from industry and academia. They are well known in their communities, having different backgrounds in crowdsourcing, mobile networks, network measurements, network performance, Quality of Service (QoS), and Quality of Experience (QoE). The discussions in the seminar focused on how crowdsourcing will support vendors, operators, and regulators to determine the Quality of Experience in new 5G networks that enable various new applications and network architectures. As a result of the discussions, the need for a white paper manifested, with the goal of providing a scientific discussion of the terms “crowdsourced network measurements” and “crowdsourced QoE measurements”, describing relevant use cases for such crowdsourced data, and its underlying challenges. During the seminar, those main topics were identified, intensively discussed in break-out groups, and brought back into the plenum several times. The outcome of the seminar is this white paper at hand which is – to our knowledge – the first one covering the topic of crowdsourced network and QoE measurements. KW - Crowdsourcing KW - Network Measurements KW - Quality of Service (QoS) KW - Quality of Experience (QoE) KW - crowdsourced network measurements KW - crowdsourced QoE measurements Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-202327 ER -