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A Search for Supersymmetry in Final States with Two Same-flavor Opposite-sign Leptons, Jets and Missing Transverse Momentum with the ATLAS Detector

2017
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Release : 2017
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Kind : eBook
Book Rating : 508/5 ( reviews)

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Book Synopsis A Search for Supersymmetry in Final States with Two Same-flavor Opposite-sign Leptons, Jets and Missing Transverse Momentum with the ATLAS Detector by : Giulia Ripellino

Download or read book A Search for Supersymmetry in Final States with Two Same-flavor Opposite-sign Leptons, Jets and Missing Transverse Momentum with the ATLAS Detector written by Giulia Ripellino. This book was released on 2017. Available in PDF, EPUB and Kindle. Book excerpt:

The Search for Supersymmetry in Hadronic Final States Using Boosted Object Reconstruction

2020-03-13 Science
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Release : 2020-03-13
Genre : Science
Kind : eBook
Book Rating : 483/5 ( reviews)

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Book Synopsis The Search for Supersymmetry in Hadronic Final States Using Boosted Object Reconstruction by : Giordon Stark

Download or read book The Search for Supersymmetry in Hadronic Final States Using Boosted Object Reconstruction written by Giordon Stark. This book was released on 2020-03-13. Available in PDF, EPUB and Kindle. Book excerpt: This thesis represents one of the most comprehensive and in-depth studies of the use of Lorentz-boosted hadronic final state systems in the search for signals of Supersymmetry conducted to date at the Large Hadron Collider. A thorough assessment is performed of the observables that provide enhanced sensitivity to new physics signals otherwise hidden under an enormous background of top quark pairs produced by Standard Model processes. This is complemented by an ingenious analysis optimization procedure that allowed for extending the reach of this analysis by hundreds of GeV in mass of these hypothetical new particles. Lastly, the combination of both deep, thoughtful physics analysis with the development of high-speed electronics for identifying and selecting these same objects is not only unique, but also revolutionary. The Global Feature Extraction system that the author played a critical role in bringing to fruition represents the first dedicated hardware device for selecting these Lorentz-boosted hadronic systems in real-time using state-of-the-art processing chips and embedded systems.

Search for New Physics in Final States with Two Opposite-sign, Same-flavor Leptons, Jets, and Missing Transverse Momentum in Pp Collisions at $\sqrt{s}$

2016
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Release : 2016
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Book Rating : /5 ( reviews)

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Book Synopsis Search for New Physics in Final States with Two Opposite-sign, Same-flavor Leptons, Jets, and Missing Transverse Momentum in Pp Collisions at $\sqrt{s}$ by :

Download or read book Search for New Physics in Final States with Two Opposite-sign, Same-flavor Leptons, Jets, and Missing Transverse Momentum in Pp Collisions at $\sqrt{s}$ written by . This book was released on 2016. Available in PDF, EPUB and Kindle. Book excerpt: A search is presented for physics beyond the standard model in final states with two opposite-sign, same-flavor leptons, jets, and missing transverse momentum. The data sample corresponds to an integrated luminosity of 2.3 inverse femtobarns of proton-proton collisions at sqrt(s)=13 TeV collected with the CMS detector at the LHC in 2015. The analysis uses the invariant mass of the lepton pair, searching for a kinematic edge or a resonant-like excess compatible with the Z boson mass. Both search modes use several event categories in order to increase the sensitivity to new physics. These categories are based on the rapidity of the leptons, the multiplicity of jets and b jets, the scalar sum of jet transverse momenta, and missing transverse momentum. In addition, phase space regions are included for which excesses were reported using the sqrt(s)=8 TeV data. A local significance of 2.6 sigma for a kinematic edge search was observed by the CMS Collaboration, and of 3.0 sigma for events compatible with the Z boson mass by the ATLAS Collaboration. The observations in all signal regions are consistent with the expectations from the standard model, and the results are interpreted in the context of simplified models of supersymmetry.

Electroweak Physics at the Large Hadron Collider with the ATLAS Detector

2020-11-03 Science
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Release : 2020-11-03
Genre : Science
Kind : eBook
Book Rating : 169/5 ( reviews)

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Book Synopsis Electroweak Physics at the Large Hadron Collider with the ATLAS Detector by : Elodie Resseguie

Download or read book Electroweak Physics at the Large Hadron Collider with the ATLAS Detector written by Elodie Resseguie. This book was released on 2020-11-03. Available in PDF, EPUB and Kindle. Book excerpt: This thesis discusses searches for electroweakly produced supersymmetric partners of the gauge and the Higgs bosons (gauginos and higgsinos) decaying to multiple leptons, using pp collisions at sqrt(s) = 13 TeV. The thesis presents an in-depth study of multiple searches, as well as the first 13 TeV cross section measurement for the dominant background in these searches, WZ production. Two searches were performed using 36.1/fb of data: the gaugino search, which makes use of a novel kinematic variable, and the higgsino search, which produced the first higgsino limits at the LHC. A search using 139/fb of data makes use of a new technique developed in this thesis to cross check an excess of data above the background expectation in a search using a Recursive Jigsaw Reconstruction technique. None of the searches showed a significant excess of data, and limits were expanded with respect to previous results. These searches will benefit from the addition of luminosity during HL-LHC; however, the current detector will not be able to withstand the increase in radiation. Electronics for the detector upgrade are tested and irradiated to ensure their performance.

Phenomena Beyond the Standard Model: What Do We Expect for New Physics to Look Like?

2020-09-03 Science
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Release : 2020-09-03
Genre : Science
Kind : eBook
Book Rating : 908/5 ( reviews)

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Book Synopsis Phenomena Beyond the Standard Model: What Do We Expect for New Physics to Look Like? by : Roman Pasechnik

Download or read book Phenomena Beyond the Standard Model: What Do We Expect for New Physics to Look Like? written by Roman Pasechnik. This book was released on 2020-09-03. Available in PDF, EPUB and Kindle. Book excerpt: This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.

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