Discovery of Single Top Quark Production

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Publisher : Springer Science & Business Media
ISBN 13 : 1441977996
Total Pages : 149 pages
Book Rating : 4.4/5 (419 download)

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Book Synopsis Discovery of Single Top Quark Production by : Dag Gillberg

Download or read book Discovery of Single Top Quark Production written by Dag Gillberg and published by Springer Science & Business Media. This book was released on 2011-01-22 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: The top quark is by far the heaviest known fundamental particle with a mass nearing that of a gold atom. Because of this strikingly high mass, the top quark has several unique properties and might play an important role in electroweak symmetry breaking—the mechanism that gives all elementary particles mass. Creating top quarks requires access to very high energy collisions, and at present only the Tevatron collider at Fermilab is capable of reaching these energies. Until now, top quarks have only been observed produced in pairs via the strong interaction. At hadron colliders, it should also be possible to produce single top quarks via the electroweak interaction. Studies of single top quark production provide opportunities to measure the top quark spin, how top quarks mix with other quarks, and to look for new physics beyond the standard model. Because of these interesting properties, scientists have been looking for single top quarks for more than 15 years. This thesis presents the first discovery of single top quark production. It documents one of the flagship measurements of the D0 experiment, a collaboration of more than 600 physicists from around the world. It describes first observation of a physical process known as “single top quark production”, which had been sought for more than 10 years before its eventual discovery in 2009. Further, his thesis describes, in detail, the innovative approach Dr. Gillberg took to this analysis. Through the use of Boosted Decision Trees, a machine-learning technique, he observed the tiny single top signal within an otherwise overwhelming background. This Doctoral Thesis has been accepted by Simon Fraser University, Burnaby, BC, Canada.

Higher Order QCD Corrections to Single Top Quark Production

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Author :
Publisher : disserta Verlag
ISBN 13 : 3954256746
Total Pages : 161 pages
Book Rating : 4.9/5 (542 download)

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Book Synopsis Higher Order QCD Corrections to Single Top Quark Production by : Mohammad Assadsolimani

Download or read book Higher Order QCD Corrections to Single Top Quark Production written by Mohammad Assadsolimani and published by disserta Verlag. This book was released on 2014-08 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Top Quark Physics at Hadron Colliders

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Publisher : Springer Science & Business Media
ISBN 13 : 3540710604
Total Pages : 166 pages
Book Rating : 4.5/5 (47 download)

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Book Synopsis Top Quark Physics at Hadron Colliders by : Arnulf Quadt

Download or read book Top Quark Physics at Hadron Colliders written by Arnulf Quadt and published by Springer Science & Business Media. This book was released on 2007-08-16 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: This will be a required acquisition text for academic libraries. More than ten years after its discovery, still relatively little is known about the top quark, the heaviest known elementary particle. This extensive survey summarizes and reviews top-quark physics based on the precision measurements at the Fermilab Tevatron Collider, as well as examining in detail the sensitivity of these experiments to new physics. Finally, the author provides an overview of top quark physics at the Large Hadron Collider.

From The Tevatron To The Lhc: Physics At Large Accelerators - Proceedings Of The Xxiv International Meeting On Fundamen

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Publisher : World Scientific
ISBN 13 : 9814546380
Total Pages : 234 pages
Book Rating : 4.8/5 (145 download)

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Book Synopsis From The Tevatron To The Lhc: Physics At Large Accelerators - Proceedings Of The Xxiv International Meeting On Fundamen by : Antonio Ferrer

Download or read book From The Tevatron To The Lhc: Physics At Large Accelerators - Proceedings Of The Xxiv International Meeting On Fundamen written by Antonio Ferrer and published by World Scientific. This book was released on 1997-07-15 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book collects a series of papers presented at the XXIV International Meeting on Fundamental Physics. This annual conference is devoted to reviewing current topics in the field of high energy physics. From the Tevatron to the LHC reviews the present status of experiments at large accelerators (Tevatron, LEP, LHC) and deals with selected subjects like CP violation, B physics, glueballs, neutrinos and supersymmetry.

Single Top Quark Production and Decay in Hadron Collision at Next-to-leading Order

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Publisher :
ISBN 13 :
Total Pages : 466 pages
Book Rating : 4.3/5 (129 download)

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Book Synopsis Single Top Quark Production and Decay in Hadron Collision at Next-to-leading Order by : Qinghong Cao

Download or read book Single Top Quark Production and Decay in Hadron Collision at Next-to-leading Order written by Qinghong Cao and published by . This book was released on 2005 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Top Quark Pair Production

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Publisher : Springer Science & Business Media
ISBN 13 : 3319014870
Total Pages : 231 pages
Book Rating : 4.3/5 (19 download)

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Book Synopsis Top Quark Pair Production by : Anna Christine Henrichs

Download or read book Top Quark Pair Production written by Anna Christine Henrichs and published by Springer Science & Business Media. This book was released on 2013-10-04 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: Before any kind of new physics discovery could be made at the LHC, a precise understanding and measurement of the Standard Model of particle physics' processes was necessary. The book provides an introduction to top quark production in the context of the Standard Model and presents two such precise measurements of the production of top quark pairs in proton-proton collisions at a center-of-mass energy of 7 TeV that were observed with the ATLAS Experiment at the LHC. The presented measurements focus on events with one charged lepton, missing transverse energy and jets. Using novel and advanced analysis techniques as well as a good understanding of the detector, they constitute the most precise measurements of the quantity at that time.

Fundamental Interactions

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Publisher : World Scientific
ISBN 13 : 9814280933
Total Pages : 429 pages
Book Rating : 4.8/5 (142 download)

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Book Synopsis Fundamental Interactions by : Alan Astbury

Download or read book Fundamental Interactions written by Alan Astbury and published by World Scientific. This book was released on 2009 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains pedagogical lectures on both theoretical and experimental particle physics, cosmology, and atomic trap physics. Numerous additional contributions provide up-to-date information on new experimental results from accelerators, underground laboratories, and nuclear astrophysics. This combination of pedagogical talks and topical short discussions presents a comprehensive amount of information and latest developments to researchers.

Fundamental Interactions - Proceedings Of The 23rd Lake Louise Winter Institute 2008

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Publisher : World Scientific
ISBN 13 : 981446709X
Total Pages : 429 pages
Book Rating : 4.8/5 (144 download)

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Book Synopsis Fundamental Interactions - Proceedings Of The 23rd Lake Louise Winter Institute 2008 by : Alan Astbury

Download or read book Fundamental Interactions - Proceedings Of The 23rd Lake Louise Winter Institute 2008 written by Alan Astbury and published by World Scientific. This book was released on 2009-09-03 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains pedagogical lectures on both theoretical and experimental particle physics, cosmology, and atomic trap physics. Numerous additional contributions provide up-to-date information on new experimental results from accelerators, underground laboratories, and nuclear astrophysics. This combination of pedagogical talks and topical short discussions presents a comprehensive amount of information and latest developments to researchers.

Shifting Standards

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Publisher : University of Pittsburgh Press
ISBN 13 : 0822979195
Total Pages : 362 pages
Book Rating : 4.8/5 (229 download)

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Book Synopsis Shifting Standards by : Allan Franklin

Download or read book Shifting Standards written by Allan Franklin and published by University of Pittsburgh Press. This book was released on 2018-11-24 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Shifting Standards, Allan Franklin provides an overview of notable experiments in particle physics. Using papers published in Physical Review, the journal of the American Physical Society, as his basis, Franklin details the experiments themselves, their data collection, the events witnessed, and the interpretation of results. From these papers, he distills the dramatic changes to particle physics experimentation from 1894 through 2009. Franklin develops a framework for his analysis, viewing each example according to exclusion and selection of data; possible experimenter bias; details of the experimental apparatus; size of the data set, apparatus, and number of authors; rates of data taking along with analysis and reduction; distinction between ideal and actual experiments; historical accounts of previous experiments; and personal comments and style. From Millikan's tabletop oil-drop experiment to the Compact Muon Solenoid apparatus measuring approximately 4,000 cubic meters (not including accelerators) and employing over 2,000 authors, Franklin's study follows the decade-by-decade evolution of scale and standards in particle physics experimentation. As he shows, where once there were only one or two collaborators, now it literally takes a village. Similar changes are seen in data collection: in 1909 Millikan's data set took 175 oil drops, of which he used 23 to determine the value of e, the charge of the electron; in contrast, the 1988-1992 E791 experiment using the Collider Detector at Fermilab, investigating the hadroproduction of charm quarks, recorded 20 billion events. As we also see, data collection took a quantum leap in the 1950s with the use of computers. Events are now recorded at rates as of a few hundred per second, and analysis rates have progressed similarly. Employing his epistemology of experimentation, Franklin deconstructs each example to view the arguments offered and the correctness of the results. Overall, he finds that despite the metamorphosis of the process, the role of experimentation has remained remarkably consistent through the years: to test theories and provide factual basis for scientific knowledge, to encourage new theories, and to reveal new phenomenon.

High Energy Physics

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Publisher : World Scientific
ISBN 13 : 9814481270
Total Pages : 1424 pages
Book Rating : 4.8/5 (144 download)

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Book Synopsis High Energy Physics by : Hesheng Chen

Download or read book High Energy Physics written by Hesheng Chen and published by World Scientific. This book was released on 2005-05-03 with total page 1424 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 32nd International Conference on High Energy Physics belongs to the Rochester Conference Series, and is the most important international conference in 2004 on high energy physics. The proceedings provide a comprehensive review on the recent developments in experimental and theoretical particle physics. The latest results on Top, Higgs search, CP violation, neutrino mixing, pentaquarks, heavy quark mesons and baryons, search for new particles and new phenomena, String theory, Extra dimension, Black hole and Lattice calculation are discussed extensively. The topics covered include not only those of main interest to the high energy physics community, but also recent research and future plans. Contents: Neutrino Masses and MixingsQuark Matter and Heavy Ion CollisionsParticle Astrophysics and CosmologyElectroweak PhysicsQCD Hard InteractionsQCD Soft InteractionsComputational Quantum Field TheoryCP Violation, Rare Kaon Decay and CKMR&D for Future Accelerator and DetectorHadron Spectroscopy and ExoticsHeavy Quark Mesons and BaryonsBeyond the Standard ModelString Theory Readership: Experimental and theoretical physicists and graduate students in the fields of particle physics, nuclear physics, astrophysics and cosmology.Keywords:High Energy Physics;Particle Physics;Electroweak;QCD;Heavy Quark;Neutrino;Particle Astrophysics;Hadron Spectroscopy;CP Violation;Quark Matter;Future Accelerator

Albuquerque Meeting - Proceedings Of The 8th Meeting Division Of Particles And Fields Of The American Physical Society (In 2 Volumes)

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Publisher : World Scientific
ISBN 13 : 9814549967
Total Pages : 2088 pages
Book Rating : 4.8/5 (145 download)

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Book Synopsis Albuquerque Meeting - Proceedings Of The 8th Meeting Division Of Particles And Fields Of The American Physical Society (In 2 Volumes) by : Sally Seidel

Download or read book Albuquerque Meeting - Proceedings Of The 8th Meeting Division Of Particles And Fields Of The American Physical Society (In 2 Volumes) written by Sally Seidel and published by World Scientific. This book was released on 1995-07-05 with total page 2088 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the latest results from high energy physics laboratories. The topics discussed include: Cosmology, Heavy Ions, Electroweak, Heavy Flavour Physics and CP Violation/Rare Decays, QCD and Beyond the Standard Model, Planck Scale Physics, Accelerator and Non-Accelerator Physics and Instrumentation.

Physics at the Large Hadron Collider

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Publisher : Springer Science & Business Media
ISBN 13 : 8184892950
Total Pages : 260 pages
Book Rating : 4.1/5 (848 download)

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Book Synopsis Physics at the Large Hadron Collider by : Amitava Datta

Download or read book Physics at the Large Hadron Collider written by Amitava Datta and published by Springer Science & Business Media. This book was released on 2010-05-30 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: In an epoch when particle physics is awaiting a major step forward, the Large Hydron Collider (LHC) at CERN, Geneva will soon be operational. It will collide a beam of high energy protons with another similar beam circulation in the same 27 km tunnel but in the opposite direction, resulting in the production of many elementary particles some never created in the laboratory before. It is widely expected that the LHC will discover the Higgs boson, the particle which supposedly lends masses to all other fundamental particles. In addition, the question as to whether there is some new law of physics at such high energy is likely to be answered through this experiment. The present volume contains a collection of articles written by international experts, both theoreticians and experimentalists, from India and abroad, which aims to acquaint a non-specialist with some basic issues related to the LHC. At the same time, it is expected to be a useful, rudimentary companion of introductory exposition and technical expertise alike, and it is hoped to become unique in its kind. The fact that there is substantial Indian involvement in the entire LHC endeavour, at all levels including fabrication, physics analysis procedures as well as theoretical studies, is also amply brought out in the collection.

Physics in Collision 19

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Publisher : World Scientific
ISBN 13 : 9789810243548
Total Pages : 398 pages
Book Rating : 4.2/5 (435 download)

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Book Synopsis Physics in Collision 19 by : M. Campbell

Download or read book Physics in Collision 19 written by M. Campbell and published by World Scientific. This book was released on 2000 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: The XIX Physics in Collision conference reviewed experimental results in electroweak, quantum chromodynamics, neutrino, bottom and rare kaon physics, and updated recent developments in the area of gamma ray bursts as well as the issue of the cosmological constant and dark matter.The conference opened with reports on electroweak physics. A decade of precision experiments in laboratories around the world failed to uncover any significant deviations from standard model predictions. Precise W boson and top quark mass measurements suggest a low mass Higgs boson in the standard model, possibly within the reach of the LEP II and the upgraded Tevatron colliders. These presentations were followed by a summary of the latest results on searches for Higgs and supersymmetry.There were three reports on neutrino physics: atmospheric, solar and reactor/accelerator based neutrino experiments and results. Impressive Super-K results strongly suggest ????? oscillation, a scenario confirmed by less precise Soudan2 and MACRO data.The latest results on strange and heavy quark physics were summarized. High statistics from CLEO, LEP I and Tevatron have enabled experimenters to study many rare charm and bottom quark decays for the first time. Among many other interesting results presented, the first measurements of sin 2? by CDF and î?/î by KTeV provide a preview of expected developments in the near future.

Physics In Collision Xix, Procs

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Publisher : World Scientific
ISBN 13 : 9814492809
Total Pages : 389 pages
Book Rating : 4.8/5 (144 download)

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Book Synopsis Physics In Collision Xix, Procs by : Myron Campbell

Download or read book Physics In Collision Xix, Procs written by Myron Campbell and published by World Scientific. This book was released on 2000-07-27 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: The XIX Physics in Collision conference reviewed experimental results in electroweak, quantum chromodynamics, neutrino, bottom and rare kaon physics, and updated recent developments in the area of gamma ray bursts as well as the issue of the cosmological constant and dark matter.The conference opened with reports on electroweak physics. A decade of precision experiments in laboratories around the world failed to uncover any significant deviations from standard model predictions. Precise W boson and top quark mass measurements suggest a low mass Higgs boson in the standard model, possibly within the reach of the LEP II and the upgraded Tevatron colliders. These presentations were followed by a summary of the latest results on searches for Higgs and supersymmetry.There were three reports on neutrino physics: atmospheric, solar and reactor/accelerator based neutrino experiments and results. Impressive Super-K results strongly suggest νμ→νς oscillation, a scenario confirmed by less precise Soudan2 and MACRO data.The latest results on strange and heavy quark physics were summarized. High statistics from CLEO, LEP I and Tevatron have enabled experimenters to study many rare charm and bottom quark decays for the first time. Among many other interesting results presented, the first measurements of sin 2β by CDF and ε′/ε by KTeV provide a preview of expected developments in the near future.

The Large Hadron Collider

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Publisher : Springer
ISBN 13 : 3319150014
Total Pages : 554 pages
Book Rating : 4.3/5 (191 download)

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Book Synopsis The Large Hadron Collider by : Thomas Schörner-Sadenius

Download or read book The Large Hadron Collider written by Thomas Schörner-Sadenius and published by Springer. This book was released on 2015-05-15 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive volume summarizes and structures the multitude of results obtained at the LHC in its first running period and draws the grand picture of today’s physics at a hadron collider. Topics covered are Standard Model measurements, Higgs and top-quark physics, flavour physics, heavy-ion physics, and searches for supersymmetry and other extensions of the Standard Model. Emphasis is placed on overview and presentation of the lessons learned. Chapters on detectors and the LHC machine and a thorough outlook into the future complement the book. The individual chapters are written by teams of expert authors working at the forefront of LHC research.

Particle Physics at the Year of Astronomy

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Publisher : World Scientific
ISBN 13 : 9814329681
Total Pages : 472 pages
Book Rating : 4.8/5 (143 download)

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Book Synopsis Particle Physics at the Year of Astronomy by : A. I. Studenikin

Download or read book Particle Physics at the Year of Astronomy written by A. I. Studenikin and published by World Scientific. This book was released on 2011 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings are devoted to a wide variety of both theoretical and experimental areas in particle physics. The topics include physics at accelerators and studies of Standard Model and Beyond, neutrino and astroparticle physics, cosmology, CP Violation and rare decays, hadron physics, and new developments in quantum field theory. The papers of the volume reveal the present status and new development in the above mentioned items. In particular, the first results on measurement of LHC pp collision events are also reported.

'97 Electroweak Interactions and Unified Theories

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Publisher : Atlantica Séguier Frontières
ISBN 13 : 9782863322239
Total Pages : 604 pages
Book Rating : 4.3/5 (222 download)

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Book Synopsis '97 Electroweak Interactions and Unified Theories by : J. Thanh Van Tran

Download or read book '97 Electroweak Interactions and Unified Theories written by J. Thanh Van Tran and published by Atlantica Séguier Frontières. This book was released on 1997 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: