38 research outputs found
Large size multi-gap resistive Micromegas for the ATLAS New Small Wheel at CERN
No full textLarge size multi-gap resistive strips Micromegas have been chosen together with the small-strips TGC (sTGC) to be mounted on the New Small Wheel (NSW) upgrade of the ATLAS Muon Spectrometer. The NSW is the most ambitious and challenging upgrade of the ATLAS experiment for LHC-Phase1 (the current long shutdown) and will exploit its full capabilities after the Phase2 upgrade of LHC when the luminosity will reach values up to 7.5×1034 cm−2s−1 severely impacting on the ATLAS muon forward reconstruction and trigger. Four types of large size quadruplets Micromegas detectors are currently in series production in France, Germany, Italy, Russia and Greece. At CERN the integration of the modules and their assembly in sectors composing the wheel is well advanced. All the procedures of quality control are in place and steadily running. In this presentation the main challenges of the project will be reviewed. The achievement of the requirements for these detectors revealed to be even more challenging than expected, when scaling from the small prototypes to the large dimensions. We will describe the encountered problems, to a large extent common to other micro-pattern gaseous detectors, and the adopted solutions. In addition, the work of the integration of the detectors at CERN and the results from the validation tests at CERN on Micromegas sectors in their final configuration, including tests with cosmic rays, will be also presented
Higgs Physics in ATLAS
No full textA brief description of the numerous studies perfromed by ATLAS on Run-1 data in the context of Higgs physics will be presented. First a brief summary of the key incredients for Higgs physics of detector performance will be presented. Next, the major study channels , the discovery of the new boson along with its properties will be discussed. Finally the searches for additional Higgs-like bosons will be briefly presented
Search for non-Standard-Model Higgs at the LHC with ATLAS
No full textThe discovery prospects of non Standard Model Higgs bosons with the ATLAS detector are presented. Due to the high branching ratio, results on decay channels that include tau leptons are presented both for the search of the neutral and the charged MSSM Higgs bosons. For the neutral Higgs bosons results on the muon pair final state are also reported. Furthermore, decay scenarios that include SUSY particle cascades are investigated. Finally, in the absence of light Higgs bosons, processes of vector boson scattering at high mass are discussed, in the context of studying the mechanism of electroweak symmetry breaking. All the studies presented are based on the analysis of Monte Carlo signal and background data simulated in detail through the experimental apparatu
Higgs boson exclusive analysis and differential distributions
No full textRecent results using Run I data from the ATLAS and CMS experiments concerning Higgs boson exclusive analysis and differential distribution will be presented
Higgs Studies and Long-Lived particles
No full textPresentation delivered during the 'Identifying undiscovered particles at the Large Hadron Collider' webinar
Introducing HEP to high-school and university students through ATLAS event analysis tools
No full textSeveral EU outreach projects have been running for a few years now and have created a large number of inquiry based educational resources for highschool teachers and students. Their goal is the promotion of science education in schools though new methods built on the inquiry based education techniques, involving large consortia of European partners and implementation of largescale pilots in a very large number of European schools. Until recently there has been a shortage of educational scenaria addressed to university students to be implemented in the framework of the laboratory courses. Two such scenaria were introduced recently at the National and Kapodistrian University undergraduate labs and are described below
The Inspiring Science Education project and the resources for HEP analysis by university students
No full textThe Inspiring Science Education outreach project has been running for more than two years, creating a large number of inquiry based educational resources for high-school teachers and students. Its goal is the promotion of science education in schools though new methods built on the inquiry based education techniques, involving large consortia of European partners and implementation of large-scale pilots in schools. Recent hands-on activities, developing and testing the above mentioned innovative applications are reviewed. In general, there is a lack for educational scenaria and laboratory courses earmarked for more advanced, namely university, students. At the University of Athens for the last four years, the HYPATIA on-line event analysis tool has been used as a lab course for fourth year undergraduate physics students, majoring in HEP. Up to now, the course was limited to visual inspection of a few tens of ATLAS events. Recently the course was enriched with additional analysis exercises, which involve large samples of events. The students through a user friendly interface can analyse the samples and optimize the cut selection in order to search for new physics. The implementation of this analysis is described
HEP in Greek Classes
No full textThe HEP Inquiry learning resources created over the last four years by the European outreach projects are reviewed. The resources are mostly addressed to high school students and the purpose is to ignite their interest on science. In addition, at the University of Athens for the last four years we have been using the HYPATIA online event analysis tool as a lab course for fourth year undergraduate physics students, majoring in HEP. Each year 40–50 students highly appreciated the course, since they get a direct involvement in the actual toplevel research. Up to now, the course was limited to visual inspection of a few tens of ATLAS events. Recently we have enriched the course with additional analysis exercises, which involve large samples of events. The students, through a user friendly interface can analyze the samples (both signal and background ones) and optimize the cut selection in order to search for the Higgs decay H □ 4 leptons. Recently ATLAS released 1/fb of data, so starting now the students analyse real data
An advanced Go-Lab scenario for the GUI-based analysis of large samples of particle physics data
No full textInternational audienc
