1,721,253 research outputs found
Search for a charged Higgs boson in top antitop pair events at CMS
Get PDFLa tesi descrive la ricerca di un bosone Higgs carico prodotto nel decadimento di quark top, in un range di massa compreso tra 90 GeV e 160 GeV. Lo stato finale considerato consiste in una coppia di quark charm e bottom. I dati analizzati corrispondono a 19.7 femtobarn inversi raccolti in collisioni protone-protone ad un'energia nel centro di massa di 8 TeV registrati dall'esperimento CMS presso il collisionatore Large Hadron Collider.This thesis describes the search for a charged Higgs boson produced in top quark decays, in a mass range spanning from 90 GeV to 160 GeV. The final state consisting in a charm and a bottom quark was considered. The data analyzed correspond to an integrated luminosity of 19.7 inverse femtobarn collected in proton-proton collisions with a center-of-mass energy of 8 TeV recorded by the CMS experiment at the Large Hadron Collider
Development and performance of triple-gem detectors for the upgrade of the muon system of the cms experiment
No full textThe CMS Collaboration is evaluating GEM detectors for the upgrade of the muon system. This contribution will focus on the R&D performed on chambers design features and will discuss the performance of the upgraded detector
Antihydrogen physics: gravitation and spectroscopy in AEgIS
No full textProduzione di atomi di antimateria e verifica della interazione gravitazional
Fiber Bragg Grating (FBG) sensors as flatness and mechanical stretching sensors
No full textA novel approach which uses Fiber Bragg Grating (FBG) sensors has been utilized to assess and monitor the flatness of Gaseous Electron Multipliers (GEM) foils. The setup layout and preliminary results are presented
Status report of the upgrade of the CMS muon system with Triple-GEM detectors
No full textFor the High Luminosity LHC CMS is planning to install new large size Triple-GEM detectors, equipped with a new readout system in the forward region of its muon system (1.5 < vertical bar eta vertical bar < 2.2). In this note we report on the status of the project, the main achievements regarding the detectors as well as the electronics and readout system
Design of a constant fraction discriminator for the VFAT3 front-end ASIC of the CMS GEM detector
No full textIn this work the design of a constant fraction discriminator (CFD) to be used in the VFAT3 chip for the read-out of the triple-GEM detectors of the CMS experiment, is described. A prototype chip containing 8 CFDs was implemented using 130 nm CMOS technology and test results are shown
Impact of the GE1/1 upgrade on CMS muon system performance
No full textDuring the future LHC upgrade planned in 2018, the forward endcap region of the CMS muon spectrometer will be upgraded with GEM chambers. GEM technology is able to withstand the radiation environment expected in the forward region. The GE1/1 station will be included in the muon L1 trigger, allowing to keep low p(T) threshold even at high luminosity. Moreover, it will bring detection redundancy in the most critical part of the CMS muon system, along with benefits to muon reconstruction performance
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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