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Search for Long-lived Neutral Particles in Final States with a Muon and Multi-track Displaced Vertex with the ATLAS Detector at the Large Hadron Collider

2013
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Release : 2013
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Book Synopsis Search for Long-lived Neutral Particles in Final States with a Muon and Multi-track Displaced Vertex with the ATLAS Detector at the Large Hadron Collider by : Chang Wei Loh

Download or read book Search for Long-lived Neutral Particles in Final States with a Muon and Multi-track Displaced Vertex with the ATLAS Detector at the Large Hadron Collider written by Chang Wei Loh. This book was released on 2013. Available in PDF, EPUB and Kindle. Book excerpt:

A Search for Displaced Leptons in the ATLAS Detector

2022-02-07 Science
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Release : 2022-02-07
Genre : Science
Kind : eBook
Book Rating : 723/5 ( reviews)

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Book Synopsis A Search for Displaced Leptons in the ATLAS Detector by : Lesya Horyn

Download or read book A Search for Displaced Leptons in the ATLAS Detector written by Lesya Horyn. This book was released on 2022-02-07. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a search for long-lived particles decaying into displaced electrons and/or muons with large impact parameters. This signature provides unique sensitivity to the production of theoretical lepton-partners, sleptons. These particles are a feature of supersymmetric theories, which seek to address unanswered questions in nature. The signature searched for in this thesis is difficult to identify, and in fact, this is the first time it has been probed at the Large Hadron Collider (LHC). It covers a long-standing gap in coverage of possible new physics signatures. This thesis describes the special reconstruction and identification algorithms used to select leptons with large impact parameters and the details of the background estimation. The results are consistent with background, so limits on slepton masses and lifetimes in this model are calculated at 95% CL, drastically improving on the previous best limits from the Large Electron Positron Collider (LEP).

Search for Massive, Long-lived Particles Using Multitrack Displaced Vertices Or Displaced Lepton Pairs in [math Display

2015
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Release : 2015
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Book Synopsis Search for Massive, Long-lived Particles Using Multitrack Displaced Vertices Or Displaced Lepton Pairs in [math Display by :

Download or read book Search for Massive, Long-lived Particles Using Multitrack Displaced Vertices Or Displaced Lepton Pairs in [math Display written by . This book was released on 2015. Available in PDF, EPUB and Kindle. Book excerpt: Many extensions of the Standard Model posit the existence of heavy particles with long lifetimes. This article presents the results of a search for events containing at least one long-lived particle that decays at a significant distance from its production point into two leptons or into five or more charged particles. In this study, this analysis uses a data sample of proton-proton collisions at \(\sqrt{s} = 8\) TeV corresponding to an integrated luminosity of 20.3 fb−1 collected in 2012 by the ATLAS detector operating at the Large Hadron Collider. No events are observed in any of the signal regions, and limits are set on model parameters within supersymmetric scenarios involving R-parity violation, split supersymmetry, and gauge mediation. In some of the search channels, the trigger and search strategy are based only on the decay products of individual long-lived particles, irrespective of the rest of the event. In these cases, the provided limits can easily be reinterpreted in different scenarios.

Pattern Recognition, Tracking and Vertex Reconstruction in Particle Detectors

2021 Electronic books
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Release : 2021
Genre : Electronic books
Kind : eBook
Book Rating : 71X/5 ( reviews)

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Book Synopsis Pattern Recognition, Tracking and Vertex Reconstruction in Particle Detectors by : Rudolf Frühwirth

Download or read book Pattern Recognition, Tracking and Vertex Reconstruction in Particle Detectors written by Rudolf Frühwirth. This book was released on 2021. Available in PDF, EPUB and Kindle. Book excerpt: This open access book is a comprehensive review of the methods and algorithms that are used in the reconstruction of events recorded by past, running and planned experiments at particle accelerators such as the LHC, SuperKEKB and FAIR. The main topics are pattern recognition for track and vertex finding, solving the equations of motion by analytical or numerical methods, treatment of material effects such as multiple Coulomb scattering and energy loss, and the estimation of track and vertex parameters by statistical algorithms. The material covers both established methods and recent developments in these fields and illustrates them by outlining exemplary solutions developed by selected experiments. The clear presentation enables readers to easily implement the material in a high-level programming language. It also highlights software solutions that are in the public domain whenever possible. It is a valuable resource for PhD students and researchers working on online or offline reconstruction for their experiments.

Particle Detectors

2020-06-30 Science
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Release : 2020-06-30
Genre : Science
Kind : eBook
Book Rating : 232/5 ( reviews)

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Book Synopsis Particle Detectors by : Hermann Kolanoski

Download or read book Particle Detectors written by Hermann Kolanoski. This book was released on 2020-06-30. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the fundamentals of particle detectors as well as their applications. Detector development is an important part of nuclear, particle and astroparticle physics, and through its applications in radiation imaging, it paves the way for advancements in the biomedical and materials sciences. Knowledge in detector physics is one of the required skills of an experimental physicist in these fields. The breadth of knowledge required for detector development comprises many areas of physics and technology, starting from interactions of particles with matter, gas- and solid-state physics, over charge transport and signal development, to elements of microelectronics. The book's aim is to describe the fundamentals of detectors and their different variants and implementations as clearly as possible and as deeply as needed for a thorough understanding. While this comprehensive opus contains all the materials taught in experimental particle physics lectures or modules addressing detector physics at the Master's level, it also goes well beyond these basic requirements. This is an essential text for students who want to deepen their knowledge in this field. It is also a highly useful guide for lecturers and scientists looking for a starting point for detector development work.

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