1,721,235 research outputs found
Beyond the standard model physics at the Tevatron
No full textThe purpose of this lecture is to provide an overview of the analyses currently pursued by the Tevatron collaborations in the search for processes beyond the Standard Model. The focus has been put on Supersymmetry and - wherever possible - a pedagogical approach has been followed in presenting the analyses. For each considered process, except for combined results, only one analysis - either by CDF or D - has been discussed. The lecture has been divided in three main sections: phenomenology of the Higgs sector of the Minimal Supersymmetric Standard Model and Supersymmetry with conserved and violated R-parity. The layouts of the Fermilab accelerator complex and of the two Tevatron detectors are not discussed in the following; appropriate descriptions can be found in the references [1, 2, 3]
Overview of the ATLAS Insertable B-Layer (IBL) Project
No full textThe upgrades for the ATLAS Pixel Detector will be staged in preparation for high luminosity LHC. The first upgrade for the Pixel Detector will be the construction of a new pixel layer which will be installed during the first shutdown of the LHC machine, foreseen in 2013-14. The new detector, called the Insertable B-layer (IBL), will be installed between the existing Pixel Detector and a new, smaller radius beam-pipe at a radius of 3.3 cm. The IBL will require the development of several new technologies to cope with increased radiation and pixel occupancy and also to improve the physics performance through reduction of the pixel size and a more stringent material budget. Two different and promising silicon sensor technologies, planar n-in-n and 3D, are currently under investigation for the IBL. An overview of the IBL project, of the module design and their qualification with particular emphasis on irradiation tests will be presented
A search for flavour changing neutral currents in top-quark decays in pp collision data collected with the ATLAS detector at vs = 7 TeV
No full textCharge Asymmetry in Top Pairs at ATLAS
No full textIn 7 TeV proton - proton collisions at the LHC, pairs of top and anti-top quarks are expected to be mostly produced through gluon fusion, in contrast to production at the Tevatron, where quark annihilation dominates. The ATLAS experiment has now recorded a large number of top quark pairs, allowing this domain to be explored in detail. We present measurements of top-quark charge asymmetry which constitute important tests of QCD and are sensitive to new physics. Measurements are presented in both, the single lepton and dilepton channel. Also, the lepton based charge asymmetry in top-quark pair events has been measured and will be presented
Search for the Standard Model Higgs boson in the H to tau+ tau- decay mode in vs = 7 TeV pp collisions with ATLAS
No full textMeasurement of W ± Z production in proton-proton collisions at s=7 TeV with the ATLAS detector
No full textProblemi di fisica con soluzione. Vol. 1
No full textIl libro contiene una raccolta di oltre 260 problemi utili alla preparazione delle prove d'esame di Fisica Generale I (meccanica, termodinamica e gravitazione) delle lauree triennali in cui la Fisica è sviluppata in più annualità. L'opera nasce dall'esperienza decennale degli autori che insegnano nei CdS di Ingegneria all'Università degli Studi di Udine; il testo è quindi naturalmente rivolto agli studenti del primo anno di Ingegneria. Tuttavia, nella raccolta sono inclusi anche esercizi che, sia per gli argomenti trattati, sia per i metodi utilizzati, possono essere di interesse e stimolo anche per studenti delle lauree triennali in Fisica e Matematica. I problemi, tutti con soluzione ampia e dettagliata, sono distribuiti su sette diversi capitoli suddivisi in sezioni riguardanti contesti e temi relativamente omogenei. Nelle diverse sezioni i problemi sono ordinati, approssimativamente, in base al grado di difficolta. Il testo è anche corredato da appendici contenenti informazioni sulla notazione utilizzata, un piccolo compendio di formule matematiche, tabelle di unità di misura e valori di costanti e quantità fisiche utili nella risoluzione dei problemi
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