3,617 research outputs found

    Natural Hazard Overview: Landslides

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    The National Centre for Resilience supported the Met Office and their partner organisations in the production of a set of Natural Hazard Overviews. This factsheet is one of the set commissioned to meet a requirement for Scotland-specific information on the types, scale, duration and impact of a range of natural hazards. It contains basic guidance on actions that can be taken to mitigate the impact of landslides. The set of factsheets include information previously produced by the Natural Hazards Partnership, adapted to a Scottish context and with the addition of case studies

    Natural Hazard Overview: Wind

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    The National Centre for Resilience supported the Met Office and their partner organisations in the production of a set of Natural Hazard Overviews. This factsheet is one of the set commissioned to meet a requirement for Scotland-specific information on the types, scale, duration and impact of a range of natural hazards. It contains basic guidance on actions that can be taken to mitigate the impact of strong winds. The set of factsheets include information previously produced by the Natural Hazards Partnership, adapted to a Scottish context and with the addition of case studies

    Search for supersymmetry in final states with jets, missing transverse momentum and one isolated lepton in √s=7 TeV pp collisions using 1 fb-1 of ATLAS data

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    We present an update of a search for supersymmetry in final states containing jets, missing transverse momentum, and one isolated electron or muon, using 1.04  fb-1 of proton-proton collision data at √s=7  TeV recorded by the ATLAS experiment at the LHC in the first half of 2011. The analysis is carried out in four distinct signal regions with either three or four jets and variations on the (missing) transverse momentum cuts, resulting in optimized limits for various supersymmetry models. No excess above the standard model background expectation is observed. Limits are set on the visible cross section of new physics within the kinematic requirements of the search. The results are interpreted as limits on the parameters of the minimal supergravity framework, limits on cross sections of simplified models with specific squark and gluino decay modes, and limits on parameters of a model with bilinear R-parity violation

    Measurement of τ polarization in W→τν decays with the ATLAS detector in pp collisions at √s=7 TeV

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    In this paper, a measurement of τ polarization in W→τν decays is presented. It is measured from the energies of the decay products in hadronic τ decays with a single final state charged particle. The data, corresponding to an integrated luminosity of 24 pb−1, were collected by the ATLAS experiment at the Large Hadron Collider in 2010. The measured value of the τ polarization is Pτ=−1.06±0.04 (stat)+0.05−0.07 (syst), in agreement with the Standard Model prediction, and is consistent with a physically allowed 95 % CL interval [−1,−0.91]. Measurements of τ polarization have not previously been made at hadron colliders

    Natural Hazard Overview: Flooding

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    The National Centre for Resilience supported the Met Office and their partner organisations in the production of a set of Natural Hazard Overviews. This factsheet is one of the set commissioned to meet a requirement for Scotland-specific information on the types, scale, duration and impact of a range of natural hazards. It contains basic guidance on actions that can be taken to mitigate the impact of flooding. They include information previously produced by the Natural Hazards Partnership, adapted to a Scottish context and with the addition of case studies

    Evidence for the associated production of a W boson and a top quark in ATLAS at √s = 7 TeV

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    This Letter presents evidence for the associated production of a W boson and a top quark using 2.05 fb −1 of pp collision data at √ s = 7 TeV accumulated with the ATLAS detector at the LHC. The analysis is based on the selection of the dileptonic final states with events featuring two isolated leptons, electron or muon, with significant transverse missing momentum and at least one jet. An approach based on boosted decision trees has been developed to improve the discrimination of single top-quark Wt events from background. A template fit to the final classifier distributions is performed to determine the crosssection. The result is incompatible with the background-only hypothesis at the 3.3σ level, the expected sensitivity assuming the Standard Model production rate being 3.4σ. The corresponding cross-section is determined and found to be σWt = 16.8 ±2.9 (stat)±4.9 (syst) pb, in good agreement with the Standard Model expectation. From this result the CKM matrix element |Vtb| = 1.03 +0.16 −0.19 is derived assuming that the Wt production through |Vts | and |Vtd| is smal

    Little Constellation - a vision of contemporary art in geo-cultural micro areas and small European States

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    Communion (2010) was shown in this exhibition. The international network for contemporary art Little Constellation was initiated by Rita Canarezza & Pier Paolo Coro for the creation and the spread of projects and research in small states of Europe, Andorra, Cyprus, Iceland, Liechtenstein, Luxembourg, Malta, Monaco, Montenegro, San Marino and some micro geo-cultural entities of the European markets including Canton Ticino (CH), Ceuta (ES), Gibraltar (UK), Kaliningrad (RUS). The aims of the exhibition Little constellation is the need to give a concrete vision of this research through the meeting of more than 20 artists from the countries concerned, with the support of their cultural institutions, the involvement of Milan and two of the most important bodies for the promotion of contemporary art; DOCVA and Documentation Center for Visual Arts, Milan. Curated by Roberto Daolio, assistant curator Alessandro Castiglioni. Artists: Albani & Mussoni, Danil Akimov, Sigtrygy Berg Sigmarsson, Barbara Buhler, Canarezza & Coro, Nina Danino, Oppy De Bernardo, Sandrine Fleury, Barbara Geyer, Irena Lagator, Ingiborg Magnadotir, Mark Mangion, Christodoulos Panayiotiou, Paradise Consumer Group, Pierre Portelli, Quino and Juanjo Oliva, Matteo Terzaghi and Marco Zurcher, Axsinja Uranova, Martin Walch, Trixi Weis. The exhibition was accompanied by an illustrated publication Little Constellation published by Mousse Publishing, Italy

    Measurement of W+W− production in pp collisions at √s=7  TeV with the ATLAS detector and limits on anomalous WWZ and WWγ couplings

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    This paper presents a measurement of the W+W− production cross section in pp collisions at s√=7  TeV. The leptonic decay channels are analyzed using data corresponding to an integrated luminosity of 4.6  fb−1 collected with the ATLAS detector at the Large Hadron Collider. The W+W− production cross section σ(pp→W+W−+X) is measured to be 51.9±2.0(stat)±3.9(syst)±2.0(lumi)  pb, compatible with the Standard Model prediction of 44.7+2.1−1.9  pb. A measurement of the normalized fiducial cross section as a function of the leading lepton transverse momentum is also presented. The reconstructed transverse momentum distribution of the leading lepton is used to extract limits on anomalous WWZ and WWγ couplings
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