Higher Order Qcd Corrections To Single Top Quark Production
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Higher Order Qcd Corrections To Single Top Quark Production
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Author : Mohammad Assadsolimani
language : en
Publisher: disserta Verlag
Release Date : 2014-08
Higher Order Qcd Corrections To Single Top Quark Production written by Mohammad Assadsolimani and has been published by disserta Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-08 with Science categories.
It is known that the LHC has a considerable discovery potential because of its large centre-of-mass energy (vs =14 TeV) and the high design luminosity. In addition, the two experiments ATLAS and CMS perform precision measurements for numerous models in physics. The increasing experimental precision demands an even higher level of accuracy on the theoretical side. For a more precise prediction of outcomes, one has to consider the corrections obtained typically from Quantum Chromodynamics (QCD). The calculation of these corrections in the high energy regime is described by perturbation theory. In the present study, multi-loop calculations in QCD, including in particular two-loop corrections for single top quark production, are considered. There are several phenomenological motivations to study single top quark production: Firstly, the process is sensitive to the electroweak Wtb-vertex; moreover, non-standard couplings can hint at physics beyond the Standard Model. Secondly, the t-channel cross section measurement provides information on the b-quark Parton Distribution Functions (PDF). Finally, single top quark production enables us to directly measure the Cabibbo-Kobayashi-Maskawa(CKM) matrix element Vtb. The next-to-next-to-leading-order (NNLO) calculation of the single top quark production has many building blocks. In this study, two blocks will be presented: one-loop corrections squared and two-loop corrections interfered with Born. Initially, the one-loop squared contribution at NNLO for single top quark production will be calculated. Before we begin with the calculation of the two-loop corrections to single top quark production, we calculate the QCD form factors of heavy quarks at NNLO, along with the axial vector coupling as a first independent check. A comparison with the relevant literature suggests that this approach is in line with generally accepted procedure. This consistency check provides a proof of the validity of our setup. In the next step, the two-loop corrections to single top quark production will be calculated. After reducing all occurring tensor integrals to scalar integrals, we apply the integration by parts method (IBP) to find the master integrals. This step is a major challenge compared to all similar calculations because of the number of variables in the problem (two Mandelstam variables s and t, the dimension d and the mass of the top quark mt as well as the mass of the W boson mw). Finally, the calculation of the three kinds of topologies – vertex corrections, double boxes and non-planar double boxes – in the two-loop contribution at NNLO calculation will be presented.
Qcd Higher Order Effects And Search For New Physics
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Author : Jian Wang
language : en
Publisher: Springer
Release Date : 2015-10-28
Qcd Higher Order Effects And Search For New Physics written by Jian Wang and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-10-28 with Science categories.
This book mainly investigates the precision predictions on the signal of new physics at the Large Hadron Collider (LHC) in the perturbative Quantum Chromodynamics (QCD) scheme. The potential of the LHC to discover the signal of dark matter associated production with a photon is studied after including next-to-leading order QCD corrections. The factorization and resummation of t-channel top quark transverse momentum distribution in the standard model at both the Tevatron and the LHC with soft-collinear effective theory are presented. The potential of the early LHC to discover the signal of monotops is discussed. These examples illustrate the method of searching for new physics beyond what is known today with high precision.
Perspectives On Lhc Physics
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Author : Aaron Pierce
language : en
Publisher: World Scientific
Release Date : 2008
Perspectives On Lhc Physics written by Aaron Pierce and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Science categories.
The Large Hadron Collider (LHC), located at CERN, Geneva, Switzerland, is the world's largest and highest energy and highest intensity particle accelerator. This book provides an overview on the techniques that will be crucial for finding new physics at the LHC, as well as perspectives on the importance and implications of the discoveries. Among the contributors to this book are leaders and visionaries in the field of particle physics beyond the Standard Model, including two Nobel Laureates (Steven Weinberg and Frank Wilczek), and presumably some future Nobel Laureates, plus top younger theorists and experimenters.
Top Quark Pair Production Cross Sections And Calibration Of The Top Quark Monte Carlo Mass
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Author : Jan Kieseler
language : en
Publisher: Springer
Release Date : 2016-06-15
Top Quark Pair Production Cross Sections And Calibration Of The Top Quark Monte Carlo Mass written by Jan Kieseler and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-06-15 with Science categories.
This thesis presents the first experimental calibration of the top-quark Monte-Carlo mass. It also provides the top-quark mass-independent and most precise top-quark pair production cross-section measurement to date. The most precise measurements of the top-quark mass obtain the top-quark mass parameter (Monte-Carlo mass) used in simulations, which are partially based on heuristic models. Its interpretation in terms of mass parameters used in theoretical calculations, e.g. a running or a pole mass, has been a long-standing open problem with far-reaching implications beyond particle physics, even affecting conclusions on the stability of the vacuum state of our universe. In this thesis, this problem is solved experimentally in three steps using data obtained with the compact muon solenoid (CMS) detector. The most precise top-quark pair production cross-section measurements to date are performed. The Monte-Carlo mass is determined and a new method for extracting the top-quark mass from theoretical calculations is presented. Lastly, the top-quark production cross-sections are obtained – for the first time – without residual dependence on the top-quark mass, are interpreted using theoretical calculations to determine the top-quark running- and pole mass with unprecedented precision, and are fully consistently compared with the simultaneously obtained top-quark Monte-Carlo mass.
Single Top Quark Production And Decay In Hadron Collision At Next To Leading Order
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Author : Qinghong Cao
language : en
Publisher:
Release Date : 2005
Single Top Quark Production And Decay In Hadron Collision At Next To Leading Order written by Qinghong Cao and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Electroweak interactions categories.
96 Qcd And High Energy Hadronic Interactions
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Author : J. Thanh Van Tran
language : en
Publisher: Atlantica Séguier Frontières
Release Date : 1996
96 Qcd And High Energy Hadronic Interactions written by J. Thanh Van Tran and has been published by Atlantica Séguier Frontières this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Hadron interactions categories.
Proceedings Of The 28th International Conference On High Energy Physics In 2 Volumes
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Author : Zygmunt Ajduk
language : en
Publisher: World Scientific
Release Date : 1997-04-11
Proceedings Of The 28th International Conference On High Energy Physics In 2 Volumes written by Zygmunt Ajduk and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-04-11 with categories.
The 28th conference from the Rochester series was the major high energy physics conference in 1996. Volume one contains short reports on new theoretical and experimental results. Volume two consists of the review talks presented in the plenary sessions.
Techniques And Concepts Of High Energy Physics Xii
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Author : Harrison B. Prosper
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Techniques And Concepts Of High Energy Physics Xii written by Harrison B. Prosper and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
The twelfth Advanced Study Institute (ASI) on Techniques and Con cepts of High Energy Physics was held at the Hotel on the Cay in St. Croix, U.S. Virgin Islands in June 2002. The Institute attracted 11 lecturers and 42 advanced PhD students and recent PhD recipients in experimental particle physics from 14 different countries. The scientific program covered a broad sweep of topics that are expected to remain of interest for many years to come. The topics in this volume complement those in earlier volumes (published by Kluwer) and should be of interest to many physicists. The main financial support for the Institute was provided by the Scientific Affairs Division of the North Atlantic Treaty Organization (NATO). The Institute was eo-sponsored by the U.S. Department of Energy (DOE), the Fermi National Accelerator Laboratory (Fermilab), the U.S. National Science Foundation (NSF), the Florida State Univer sity (FSU) - Offices of the Provost and the Dean of Arts and Sciences, the Department of Physics and the FSU High Energy Physics Group - and the Institute for Theoretical and Experimental Physics (ITEP, Moscow).
Search For Single Top Quark Production In Pp Collisions At Square Root Of Strange Quark
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Author : Sarah Kristina Wolinski
language : en
Publisher:
Release Date : 2002
Search For Single Top Quark Production In Pp Collisions At Square Root Of Strange Quark written by Sarah Kristina Wolinski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Phenomenology Of Particle Physics
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Author : André Rubbia
language : en
Publisher: Cambridge University Press
Release Date : 2022-05-12
Phenomenology Of Particle Physics written by André Rubbia and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-05-12 with Science categories.
Addresses the theoretical and experimental phenomenology of particle physics for two-semester Masters and graduate courses.