Search For Heavy Down Type Vector Like Quarks In The Lepton Plus Jets Final State In 8 Tev Proton Proton Collisions Using The Atlas Detector At The Lhc
Download Search For Heavy Down Type Vector Like Quarks In The Lepton Plus Jets Final State In 8 Tev Proton Proton Collisions Using The Atlas Detector At The Lhc full books in PDF, epub, and Kindle. Read online free Search For Heavy Down Type Vector Like Quarks In The Lepton Plus Jets Final State In 8 Tev Proton Proton Collisions Using The Atlas Detector At The Lhc ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
| Author | : Diedi Hu |
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| Total Pages | : |
| Release | : 2015 |
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Download Search for Heavy Down-Type Vector-Like Quarks in the Lepton-Plus-Jets Final State in 8 TeV Proton-proton Collisions Using the ATLAS Detector at the LHC Book in PDF, Epub and Kindle
In the chiral B scenario with a 100% branching ratio of the decay B->Wt, the observed (expected) 95% CL lower limit on the B mass is 814 GeV (756 GeV).
| Author | : Dalath Rachitha Asanga Mendis |
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| Release | : 2019 |
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Download Search for Vector-like T Quarks Using Events with Oppositely-charged Lepton Pairs and Jets in Proton-proton Collisions at Centre-of-mass Energy of 13 TeV with CMS Detector Book in PDF, Epub and Kindle
A search is performed for heavy vector-like top quark partner (T) with electric charge +2/3 by using proton-proton collision events from Large Hadron Collider (LHC) at a centre- of-mass energy of 13 TeV. The data corresponds to an integrated luminosity of 35.9fb−1 collected by the Compact Muon Solenoid (CMS) experiment during 2016. The production of this new hypothetical particle is assumed to be in pairs and strong interaction is responsible for such production mechanism. T quarks can decay to various combinations of third generation quarks and standard model bosons: T → bW, tZ, or tH, and hence the final states consist of pair of opposite-sign leptons consistent with coming from a Z boson and jets. No significant excess has been observed and hence 95% CL upper limits are obtained on TT production cross section by assuming different branching ratios. T quark mass values below 1280 GeV are excluded in case of 100% branching fraction for T → tZ.
| Author | : Lesya Horyn |
| Publisher | : Springer Nature |
| Total Pages | : 146 |
| Release | : 2022-02-07 |
| Genre | : Science |
| ISBN | : 3030916723 |
Download A Search for Displaced Leptons in the ATLAS Detector Book in PDF, Epub and Kindle
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).
| Author | : B. Lee Roberts |
| Publisher | : World Scientific |
| Total Pages | : 772 |
| Release | : 2010 |
| Genre | : Science |
| ISBN | : 9814271845 |
Download Lepton Dipole Moments Book in PDF, Epub and Kindle
This book provides a self-contained description of the measurements of the magnetic dipole moments of the electron and muon, along with a discussion of the measurements of the fine structure constant, and the theory associated with magnetic and electric dipole moments. Also included are the searches for a permanent electric dipole moment of the electron, muon, neutron and atomic nuclei. The related topic of the transition moment for lepton flavor violating processes, such as neutrinoless muon or tauon decays, and the search for such processes are included as well. The papers, written by many of the leading authors in this field, cover both the experimental and theoretical aspects of these topics. Sample Chapter(s). Chapter 1: Historical Introduction to Electric and Mangnetic Moments (367 KB). Contents: Historical Introduction (B L Roberts); Electromagnetic Dipole Moments and New Physics (A Czarnecki & W J Marciano); Lepton g OCo 2 from 1947 to Present (T Kinoshita); Analytic QED Calculations of the Anomalous Magnetic Moment of the Electron (S Laporta & E Remiddi); Measurements of the Electron Magnetic Moment (G Gabrielse); Determining the Fine Structure Constant (G Gabrielse); Helium Fine Structure Theory for the Determination of (K Pachucki & J Sapirstein); Hadronic Vacuum Polarization and the Lepton Anomalous Magnetic Moments (M Davier); The Hadronic Light-by-Light Contribution to a, e (J Prades et al.); General Prescriptions for One-loop Contributions to a e, (K R Lynch); Measurement of the Muon ( g OCo 2) Value (J P Miller et al.); Muon ( g OCo 2) and Physics Beyond the Standard Model (D StAckinger); Probing CP Violation with Electric Dipole Moments (M Pospelov & A Ritz); The Electric Dipole Moment of the Electron (E D Commins & D DeMille); Neutron EDM Experiments (S K Lamoreaux & R Golub); Nuclear Electric Dipole Moments (W C Griffith et al.); EDM Measurements in Storage Rings (B L Roberts et al.); Models of Lepton Flavor Violation (Y Okada); Search for the Charged Lepton-Flavor-Violating Transition Moments l OaAE l OC (Y Kuno). Readership: Researchers and graduate students in particle physics, atomic physics and nuclear physics, as well as experts working in the field
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| Total Pages | : 7 |
| Release | : 2008 |
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Download Search for Heavy Top-like Quarks Using Lepton Plus Jets Events in 1.96-TeV P Anti-p Collisions Book in PDF, Epub and Kindle
| Author | : Ian A. D'Souza |
| Publisher | : World Scientific |
| Total Pages | : 130 |
| Release | : 1992 |
| Genre | : Science |
| ISBN | : 9789810210199 |
Download Preons Book in PDF, Epub and Kindle
There are a number of unanswered questions which indicate that the Standard Model, successful as it is, cannot be the entire story. One solution to answering these questions is that the Standard Model is an effective low-energy theory of structure hopefully nearby in its energy scale in much the same way that a model of strong interactions among nucleons mediated by pions is an effective theory for the strong interactions of quarks mediated by coloured gluons. This book reviews the Standard Model and then examines the current status of composite models. After developing criteria for judging such models the text discusses two of the major indicators of compositeness, triviality and naturalness. Using this framework as a background the various models are summarized and discussed. This monograph concludes with a chapter describing the constraints imposed on composite models by current measurements of decay rates, magnetic moment measurements, flavour changing processes etc. and describing other ways to look for signatures of compositeness.This monograph attempts to be thorough, covering all aspects of composite models, as found in the literature at the time of completion of the manuscript. As such it should be of interest to any experimental or theoretical physicist having an interest in the subject. The review of the Standard Model in the first chapter is written in such a way that anyone with a basic knowledge of Quantum Field Theory should be able to understand the entire text. As such it could also be used for supplementary reading in graduate courses.
| Author | : Gordon Kane |
| Publisher | : World Scientific |
| Total Pages | : 503 |
| Release | : 1998-07-03 |
| Genre | : Science |
| ISBN | : 9814495824 |
Download Perspectives On Supersymmetry Book in PDF, Epub and Kindle
Supersymmetry is at an exciting stage of development. It extends the Standard Model of particle physics into a more powerful theory that both explains more and allows more questions to be addressed. Most important, it opens a window for studying and testing fundamental theories at the Planck scale. Experimentally we are finally entering the intensity and energy regions where superpartners are likely to be detected, and then studied. There has been progress in understanding the remarkable physics implications of supersymmetry, including the derivation of the Higgs mechanism, the unification of the Standard Model forces, cosmological connections such as a candidate for the cold dark matter of the universe and the scalar fields that drive inflation and their potential, the relationship to Planck scale theories, and more.While there are a number of reviews and books where the mathematical structure and uses of supersymmetry can be learned, there are few where the particle physics is the main focus. This book fills that gap. It begins with an excellent pedagogical introduction to the physics and methods and formalism of supersymmetry, by S Martin, which is accessible to anyone with a basic knowledge of the Standard Model of particle physics. Next is an overview of open questions by K Dienes and C Kolda, followed by chapters on topics ranging from how to detect superpartners to connections with Planck scale theories, by leading experts.This invaluable book will allow any interested physicist to understand the coming experimental and theoretical progress in supersymmetry, and will also help students and workers to quickly learn new aspects of supersymmetry they want to pursue.
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| Total Pages | : 21 |
| Release | : 2015 |
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Download Search for W' {u2192} Tb{u00AF} in the Lepton Plus Jets Final State in Proton-proton Collisions at a Centre-of-mass Energy of {u221A}s Book in PDF, Epub and Kindle
In this study, a search for new charged massive gauge bosons, called W', is performed with the ATLAS detector at the LHC, in proton–proton collisions at a centre-of-mass energy of √s=8 TeV, using a dataset corresponding to an integrated luminosity of 20.3 fb-1. This analysis searches for W' bosons in the W' → tb¯ decay channel in final states with electrons or muons, using a multivariate method based on boosted decision trees. The search covers masses between 0.5 and 3.0 TeV, for right-handed or left-handed W' bosons. No significant deviation from the Standard Model expectation is observed and limits are set on the W' → tb¯ cross-section times branching ratio and on the W'-boson effective couplings as a function of the W'-boson mass using the CLs procedure. For a left-handed (right-handed) W' boson, masses below 1.70 (1.92) TeV are excluded at 95% confidence level.
| Author | : Howard Baer |
| Publisher | : Cambridge University Press |
| Total Pages | : 557 |
| Release | : 2023-01-31 |
| Genre | : Science |
| ISBN | : 1009289845 |
Download Weak Scale Supersymmetry Book in PDF, Epub and Kindle
This OA text develops the basic concepts of supersymmetry for experimental and phenomenological particle physicists and graduate students.
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| Release | : 2015 |
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Download Measurement of the Top Pair Production Cross Section in 8 TeV Proton-proton Collisions Using Kinematic Information in the Lepton + Jets Final State with ATLAS. Book in PDF, Epub and Kindle
