17 research outputs found

    Combination of searches for heavy spin-1 resonances using 139 fb−1 of proton-proton collision data at s = 13 TeV with the ATLAS detector

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    A combination of searches for new heavy spin-1 resonances decaying into different pairings of W, Z, or Higgs bosons, as well as directly into leptons or quarks, is presented. The data sample used corresponds to 139 fb−1 of proton-proton collisions at = 13 TeV collected during 2015–2018 with the ATLAS detector at the CERN Large Hadron Collider. Analyses selecting quark pairs (qq, bb, , and tb) or third-generation leptons (τν and ττ) are included in this kind of combination for the first time. A simplified model predicting a spin-1 heavy vector-boson triplet is used. Cross-section limits are set at the 95% confidence level and are compared with predictions for the benchmark model. These limits are also expressed in terms of constraints on couplings of the heavy vector-boson triplet to quarks, leptons, and the Higgs boson. The complementarity of the various analyses increases the sensitivity to new physics, and the resulting constraints are stronger than those from any individual analysis considered. The data exclude a heavy vector-boson triplet with mass below 5.8 TeV in a weakly coupled scenario, below 4.4 TeV in a strongly coupled scenario, and up to 1.5 TeV in the case of production via vector-boson fusion

    Combination of searches for heavy spin-1 resonances using 139 fb−1 of proton-proton collision data at √s = 13 TeV with the ATLAS detector

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    A combination of searches for new heavy spin-1 resonances decaying into diferent pairings of W, Z, or Higgs bosons, as well as directly into leptons or quarks, is presented. The data sample used corresponds to 139 fb−1 of proton-proton collisions at √s = 13 TeV collected during 2015–2018 with the ATLAS detector at the CERN Large Hadron Collider. Analyses selecting quark pairs (qq, bb, tt¯, and tb) or third-generation leptons (τν and τ τ ) are included in this kind of combination for the frst time. A simplifed model predicting a spin-1 heavy vector-boson triplet is used. Cross-section limits are set at the 95% confdence level and are compared with predictions for the benchmark model. These limits are also expressed in terms of constraints on couplings of the heavy vector-boson triplet to quarks, leptons, and the Higgs boson. The complementarity of the various analyses increases the sensitivity to new physics, and the resulting constraints are stronger than those from any individual analysis considered. The data exclude a heavy vector-boson triplet with mass below 5.8 TeV in a weakly coupled scenario, below 4.4 TeV in a strongly coupled scenario, and up to 1.5 TeV in the case of production via vector-boson fusion

    Measurement of vector boson production cross sections and their ratios using pp collisions at √s = 13.6 TeV with the ATLAS detector

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    Abstract available from publisher's website

    Combination of searches for heavy spin-1 resonances using 139 fb−1 of proton-proton collision data at √s = 13 TeV with the ATLAS detector

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    A combination of searches for new heavy spin-1 resonances decaying into different pairings of W, Z, or Higgs bosons, as well as directly into leptons or quarks, is presented. The data sample used corresponds to 139 fb−1 of proton-proton collisions at √s = 13 TeV collected during 2015–2018 with the ATLAS detector at the CERN Large Hadron Collider. Analyses selecting quark pairs (qq, bb, tt¯, and tb) or third-generation leptons (τν and ττ) are included in this kind of combination for the first time. A simplified model predicting a spin-1 heavy vector-boson triplet is used. Cross-section limits are set at the 95% confidence level and are compared with predictions for the benchmark model. These limits are also expressed in terms of constraints on couplings of the heavy vector-boson triplet to quarks, leptons, and the Higgs boson. The complementarity of the various analyses increases the sensitivity to new physics, and the resulting constraints are stronger than those from any individual analysis considered. The data exclude a heavy vector-boson triplet with mass below 5.8 TeV in a weakly coupled scenario, below 4.4 TeV in a strongly coupled scenario, and up to 1.5 TeV in the case of production via vector-boson fusion

    Search for new phenomena with top-quark pairs and large missing transverse momentum using 140 fb−1 of pp collision data at √s = 13 TeV with the ATLAS detector

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    A search is conducted for new phenomena in events with a top quark pair and large missing transverse momentum, where the top quark pair is reconstructed in final states with one isolated electron or muon and multiple jets. The search is performed using the Large Hadron Collider proton-proton collision data sample at a centre-of-mass energy of √s = 13 TeV recorded by the ATLAS detector that corresponds to an integrated luminosity of 140 fb−1. An analysis based on neural network classifiers is optimised to search for directly produced pairs of supersymmetric partners of the top quark (stop), and to search for spin-0 mediators, produced in association with a pair of top quarks, that decay into dark-matter particles. In the stop search, the analysis is designed to target models in which the mass difference between the stop and the neutralino from the stop decay is close to the top quark mass. This new search is combined with previously published searches in final states with different lepton multiplicities. No significant excess above the Standard Model background is observed, and limits at 95% confidence level are set. Models with neutralinos with masses up to 570 GeV are excluded, while for small neutralino masses models are excluded for stop masses up to 1230 GeV. Scalar (pseudoscalar) dark matter mediator masses as large as 350 (370) GeV are excluded when the coupling strengths of the mediator to Standard Model and dark-matter particles are both set to one. At lower mediator masses, models with production cross-sections as small as 0.15 (0.16) times the nominal predictions are excluded. Results of this search are also used to set constraints on effective four-fermion contact interactions between top quarks and neutrinos

    A fine and growing art: Norman Mailer, William Styron, and James Jones in conversation

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    Thesis (Ph.D.)--Boston University. Please note: Editorial Studies works are permanently embargoed in OpenBU. No public access is forecasted for this item. To request private access, please click on the locked Download file link, and fill out the appropriate web form.A Fine and Growing Art is an annotated edition of letters and other documents chronicling the intertwining relationships and careers of Norman Mailer, James Jones, and William Styron, three prominent figures in American literature of the past century. I have endeavored to collect every surviving letter exchanged between the principals; I also include letters of other interlocutors, and published writings in which the principals discuss one another (or are discussed by others), insofar as these collateral documents touch informatively upon the principals' relationships with one another. A Fine and Growing Art is an elaborated three-way conversation, bringing forward expressions of opinion and feeling both public (in the sense of published, and often prominently so) and candid (in the reserved company of friends, or even in the near-secrecy of an unsent draft). Often funny, occasionally outrageous, consistently engaging, A Fine and Growing Art begins to unravel the mysteries long surrounding these three literary titans-about their friendships particularly, their feuds also, their evolving art, and how it all came to pass.2031-01-0

    A ballistic similitude design criterion for artillery projectiles

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    Systematic Severe Acute Respiratory Syndrome Coronavirus 2 Screening at Hospital Admission in Children: A French Prospective Multicenter Study

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    International audienceTo assess the relevance of systematic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) screening of all children admitted to hospital, we conducted a prospective multicenter study including 438 consecutive hospitalized children. A symptom-based SARS-CoV-2 testing strategy failed to identify 45% (95% confidence interval, 24%-68%) of hospitalized children infected by SARS-CoV-2. To limit intrahospital transmission, a systematic screening of children admitted to hospital should be considered

    Ecrire en francophonie : une prise de pouvoir ?

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    Proposé sous forme de question, l'enjeu de ce premier numéro de la revue Etudes de lettres consacré à une problématique francophone vise à faire découvrir des littératures encore peu étudiées dans les universités suisses. Mais tout d'abord, que désigne l'appellation « francophonie littéraire » ? Peut-elle fonctionner comme une catégorie d'appartenance poétique ? Si tel est le cas, la pratique littéraire du français, hors de France, implique-t-elle une « prise de pouvoir », une appropriation de la langue en tant qu'instrument de revendication identitaire et poétique ? Une telle question peut sembler une boutade, tant elle est caricaturale. Il n'est pourtant pas inutile de cerner en détail des situations particulières, au vu de la diversité de ceux qui ont le français en partage, et surtout de s'interroger sur les écarts entre ce que nous pourrions nommer une esthétique de la production, qui implique des choix narratifs et stylistiques, et une esthétique de la réception, qui donne pouvoir au lecteur de reconnaître, voire de faire sienne, cette francophonie littéraire
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