Описание: This thesis focuses on searches for squarks with the ATLAS detector in "compressed" scenarios where the scalar top is very close in mass to the lightest supersymmetric particle. Two main analyses are presented: the first is a search for scalar tops decaying to charm quarks.
Автор: Brendlinger Название: Physics with Electrons in the ATLAS Detector ISBN: 3319739298 ISBN-13(EAN): 9783319739298 Издательство: Springer Рейтинг: Цена: 13974.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Introduction.- Theory.- Experimental Apparatus.- Alignment of the TRT.- Electron Identification.- Electron Efficiency Measurements using Z → ee Events.- Higgs Decaying to Four Leptons.- Conclusions.
Автор: Kurt Brendlinger Название: Physics with Electrons in the ATLAS Detector ISBN: 3319892622 ISBN-13(EAN): 9783319892627 Издательство: Springer Рейтинг: Цена: 13974.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: This thesis presents two production cross-section measurements of pairs of massive bosons using ?nal states with leptons, made with the ATLAS detector at the Large Hadron Collider. The ?rst measurement, performed using data collected in 2012 at center-of-mass energy ? s = 8 TeV, is the ?rst ?ducial and di?erential cross-section measurement of the production of the Higgs Boson when it decays to four charged leptons (electrons or muons). The second measurement is the ?rst ?ducial and inclusive production cross-section measurement of WZ pairs at center-of-mass energy ? s = 13 TeV using ?nal states with three charged leptons. A signi?cant portion of the thesis focuses on the methods used to identify electrons from massive boson decay—important for many ?agship measurements—and on assessing the e?ciency of these particle identi?cation techniques. The chapter discussing the WZ pair cross-section measurement provides a detailed example of an estimate of lepton background in the context of an analysis with three leptons in the ?nal state.
Автор: Schramm Название: Searching for Dark Matter with the ATLAS Detector ISBN: 3319444522 ISBN-13(EAN): 9783319444529 Издательство: Springer Рейтинг: Цена: 18284.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание:
This thesis describes the search for Dark Matter at the LHC in the mono-jet plus missing transverse momentum final state, using the full dataset recorded in 2012 by the ATLAS Experiment. It is the first time that the number of jets is not explicitly restricted to one or two, thus increasing the sensitivity to new signals. Instead, a balance between the most energetic jet and the missing transverse momentum is required, thus selecting mono-jet-like final states.
Collider searches for Dark Matter have typically used signal models employing effective field theories (EFTs), even when comparing to results from direct and indirect detection experiments, where the difference in energy scale renders many such comparisons invalid. The thesis features the first robust and comprehensive treatment of the validity of EFTs in collider searches, and provides a means by which the different classifications of Dark Matter experiments can be compared on a sound and fair basis.
Автор: Johanna Gramling Название: Search for Dark Matter with the ATLAS Detector ISBN: 3030069559 ISBN-13(EAN): 9783030069551 Издательство: Springer Рейтинг: Цена: 13974.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание:
This book discusses searches for Dark Matter at the CERN’s LHC, the world’s most powerful accelerator. It introduces the relevant theoretical framework and includes an in-depth discussion of the Effective Field Theory approach to Dark Matter production and its validity, as well as an overview of the formalism of Simplified Dark Matter models. Despite overwhelming astrophysical evidence for Dark Matter and numerous experimental efforts to detect it, the nature of Dark Matter still remains a mystery and has become one of the hottest research topics in fundamental physics.
Two searches for Dark Matter are presented, performed on data collected with the ATLAS experiment. They analyze missing-energy final states with a jet or with top quarks. The analyses are explained in detail, and the outcomes and their interpretations are discussed, also in view of the precedent analysis of theoretical approaches. Given its depth of coverage, the book represents an excellent reference guide for all physicists interested in understanding the theoretical and experimental considerations relevant to Dark Matter searches at the LHC.
Автор: Gramling Название: Search for Dark Matter with the ATLAS Detector ISBN: 3319950150 ISBN-13(EAN): 9783319950150 Издательство: Springer Рейтинг: Цена: 13974.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: The Standard Model.- Dark Matter.- Supersymmetry.- The ATLAS Detector at the LHC.- Validity of Effective Field Theory Dark Matter Models at the LHC.- Search for Dark Matter in Monojet-like Events.- Constraints on Simplified Dark Matter Models from Mono-X Searches.- Search for New Physics in Events with Missing Energy and Top Quarks.- Conclusions.
Описание: 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.
Описание: This doctoral thesis focuses on the search for new phenomena in top-antitop quark (tt) final states with additional b-quark jets at the LHC. It uses the full Run 1 dataset collected by the ATLAS experiment in proton-proton collisions at ?s=8 TeV. The final state of interest consists of an isolated lepton, a neutrino and at least six jets with at least four b-tagged jets, a challenging experimental signature owing to the large background from tt+heavy-flavor production. This final state is characteristic of ttH production, with the Higgs boson decaying into bb, a process that allows direct probing of the top-Higgs Yukawa coupling. This signature is also present in many extensions of the Standard Model that have been proposed as solutions to the hierarchy problem, such as supersymmetry or composite Higgs models, which predict the pair production of bosonic or fermionic top quark partners, or the anomalous production of four-top-quark events. All these physics processes have been searched for using an ambitious search strategy that has been developed on the basis of a combination of state-of-art theoretical predictions and a sophisticated statistical analysis to constrain in-situ the large background uncertainties. As a result, the most restrictive bounds to date on the above physics processes have been obtained.
Автор: Jana Nov?kov? Название: Standard Model Measurements with the ATLAS Detector ISBN: 3319008099 ISBN-13(EAN): 9783319008097 Издательство: Springer Рейтинг: Цена: 18167.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: This book deals with two main procedures performed with the ATLAS detector at the Large Hadron Collider (LHC). It offers a valuable contribution to understanding noise in the hadronic calorimeter TileCal.
Описание: This Thesis describes the first measurement of, and constraints on, Higgs boson production in the vector boson fusion mode, where the Higgs decays to b quarks (the most common decay channel), at the LHC.
Описание: This book presents the first jet measurement at the LHC, confronting experimental challenges of precision measurements. Inclusive jet cross section data illustrate the momentum distribution of quarks and gluons in the proton, the magnitude of the strong force.
