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Higgs Boson Mass In The Standard Model At Two Loop Order And Beyond
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Book Synopsis Higgs Boson Mass in the Standard Model at Two-loop Order and Beyond by :
Download or read book Higgs Boson Mass in the Standard Model at Two-loop Order and Beyond written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We calculate the mass of the Higgs boson in the standard model in terms of the underlying Lagrangian parameters at complete 2-loop order with leading 3-loop corrections. A computer program implementing the results is provided. The program also computes and minimizes the standard model effective potential in Landau gauge at 2-loop order with leading 3-loop corrections.
Book Synopsis Beyond Standard Model Collider Phenomenology of Higgs Physics and Supersymmetry by : Marc Christopher Thomas
Download or read book Beyond Standard Model Collider Phenomenology of Higgs Physics and Supersymmetry written by Marc Christopher Thomas and published by Springer. This book was released on 2016-08-01 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis studies collider phenomenology of physics beyond the Standard Model at the Large Hadron Collider (LHC). It also explores in detail advanced topics related to Higgs boson and supersymmetry – one of the most exciting and well-motivated streams in particle physics. In particular, it finds a very large enhancement of multiple Higgs boson production in vector-boson scattering when Higgs couplings to gauge bosons differ from those predicted by the Standard Model. The thesis demonstrates that due to the loss of unitarity, the very large enhancement for triple Higgs boson production takes place. This is a truly novel finding. The thesis also studies the effects of supersymmetric partners of top and bottom quarks on the Higgs production and decay at the LHC, pointing for the first time to non-universal alterations for two main production processes of the Higgs boson at the LHC–vector boson fusion and gluon–gluon fusion. Continuing the exploration of Higgs boson and supersymmetry at the LHC, the thesis extends existing experimental analysis and shows that for a single decay channel the mass of the top quark superpartner below 175 GeV can be completely excluded, which in turn excludes electroweak baryogenesis in the Minimal Supersymmetric Model. This is a major new finding for the HEP community. This thesis is very clearly written and the introduction and conclusions are accessible to a wide spectrum of readers.
Book Synopsis Standard Model And Beyond, The - Proceedings Of The Ninth Symposium On Theoretical Physics by : Jihn E Kim
Download or read book Standard Model And Beyond, The - Proceedings Of The Ninth Symposium On Theoretical Physics written by Jihn E Kim and published by World Scientific. This book was released on 1991-06-13 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most recent LEP data is included in the lectures. The subjects include Higgs physics, KM angles, weak CP violation, neutron electric dipole moment, SUSY phenomenology, radiative corrections, and e+e- experiments.
Book Synopsis The Standard Model Higgs Boson by : M.B. Einhorn
Download or read book The Standard Model Higgs Boson written by M.B. Einhorn and published by Elsevier. This book was released on 2012-12-02 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Standard Model of electroweak and strong interactions contains a scalar field which permeates all of space and matter, and whose properties provide the explanation of the origin of the masses. Commonly referred to as the Higgs field, it assumes in the physical vacuum a non-vanishing classical expectation value to which the masses of not only the vector bosons, but all the other known fundamental particles (quarks and leptons) are proportional. This volume presents a concise summary of the phenomenological properties of the Higgs boson.
Book Synopsis The Standard Model by : Cliff Burgess
Download or read book The Standard Model written by Cliff Burgess and published by Cambridge University Press. This book was released on 2006-12-07 with total page 559 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book was first published in 2006. The standard model brings together two theories of particle physics in order to describe the interactions of subatomic particles, except those due to gravity. This book uses the standard model as a vehicle for introducing quantum field theory. In doing this the book also introduces much of the phenomenology on which this model is based. The book uses a modern approach, emphasizing effective field theory techniques, and contains brief discussions of some of the main proposals for going beyond the standard model, such as seesaw neutrino masses, supersymmetry, and grand unification. Requiring only a minimum of background material, this book is ideal for graduate students in theoretical and experimental particle physics. It concentrates on getting students to the level of being able to use this theory by doing real calculations with the minimum of formal development, and contains several problems.
Book Synopsis Perspectives on Higgs Physics by : G. L. Kane
Download or read book Perspectives on Higgs Physics written by G. L. Kane and published by World Scientific. This book was released on 1993-01-01 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: The masses of fermions and gauge bosons enter the Standard Model through the Higgs mechanism, which is satisfactory technically but is not understood physically. We do not know what nature really does to give mass to particles, nor what experimental clues will lead us to nature's solution. Understanding Higgs physics is necessary in order to complete the Standard Model, and to learn how to extend it and improve its foundations.This book is a collection of current work and thinking about these questions by active workers. It speculates about what form the answers will take, as well as updates and extends previous books and reviews. Some chapters emphasize theoretical questions, some focus on connections with other areas of physics, and some discuss how we can get the data to uncover nature's solution.
Book Synopsis The God Particle by : Leon M. Lederman
Download or read book The God Particle written by Leon M. Lederman and published by Houghton Mifflin Harcourt. This book was released on 2006 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fascinating tour of particle physics from Nobel Prize winner Leon Lederman. At the root of particle physics is an invincible sense of curiosity. Leon Lederman embraces this spirit of inquiry as he moves from the Greeks' earliest scientific observations to Einstein and beyond to chart this unique arm of scientific study. His survey concludes with the Higgs boson, nicknamed the God Particle, which scientists hypothesize will help unlock the last secrets of the subatomic universe, quarks and all--it's the dogged pursuit of this almost mystical entity that inspires Lederman's witty and accessible history.
Book Synopsis The Higgs Hunter's Guide by : John F. Gunion
Download or read book The Higgs Hunter's Guide written by John F. Gunion and published by CRC Press. This book was released on 2018-03-05 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Higgs Hunter's Guide is a definitive and comprehensive guide to the physics of Higgs bosons. In particular, it discusses the extended Higgs sectors required by those recent theoretical approaches that go beyond the Standard Model, including supersymmetry and superstring-inspired models.
Book Synopsis Perspectives on Higgs Physics II by : G. L. Kane
Download or read book Perspectives on Higgs Physics II written by G. L. Kane and published by World Scientific. This book was released on 1997 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Standard Model of particle physics is extremely successful in describing nature. It is, however, incomplete in one major way: the masses of gauge bosons and fermions enter the Standard Model through the Higgs mechanism. That is completely satisfactory technically, but it is not understood physically. We do not yet know what nature really does to give mass to particles. Understanding Higgs physics is necessary in order to complete the Standard Model, and to learn how to extend it and improve its foundations.This book is a collection of current work and thinking about these questions by active workers. It speculates about what form the answers will take, as well as updates and extends previous books and reviews. Some chapters emphasize theoretical questions, some focus on connections with other areas of physics, and some discuss how we can get data to uncover nature's solution. This second edition adds information and insights from the last five years, including the recent indirect but statistically significant evidence for the existence of a Higgs boson from precision measurements. It contains contributions from Blondel, Quiros, Haber, Pokorski, Dawson, Janot, Mrenna, Gunion, Ibanez, Ross, Bigi, Carena, Wagner, Georgi, Chanowitz, Yuan, Hill, and others.
Book Synopsis The HIGGS Boson Mass at 2 Loops in the Finely Tuned Split Supersymmetric Standard Model by :
Download or read book The HIGGS Boson Mass at 2 Loops in the Finely Tuned Split Supersymmetric Standard Model written by and published by . This book was released on 2004 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mass of the Higgs boson in the finely tuned Split Supersymmetric Standard Model is calculated. All 1 loop threshold effects are included, in addition to the full RG running of the Higgs quartic coupling through 2 loops. The 2 loop corrections are very small, typically less than 1GeV. The 1 loop threshold corrections to the top yukawa coupling and the Higgs mass generally push the Higgs mass down a few GeV.
Book Synopsis Beyond the Standard Model of Elementary Particle Physics by : Yorikiyo Nagashima
Download or read book Beyond the Standard Model of Elementary Particle Physics written by Yorikiyo Nagashima and published by John Wiley & Sons. This book was released on 2014-06-09 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique and comprehensive presentation on modern particle physics which stores the background knowledge on the big open questions beyond the standard model, as the existence of the Higgs-boson, or the nature of Dark Matter and Dark Energy.
Book Synopsis Higgs Boson Physics Beyond the Standard Model by : Yun Jiang
Download or read book Higgs Boson Physics Beyond the Standard Model written by Yun Jiang and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The discovery of a new particle with mass of about 125 GeV was a real triumph of run-1 of the Large Hadron Collider (LHC). To date, the analysis of the full data collected clearly shows that its properties match very well those expected for the Higgs boson in the Standard Model (SM). However, the SM itself leaves many serious questions unsolved and cannot completely describe all the observed phenomena. Hence, it must be only a component of a more complete theory. Theories that go beyond the SM typically require an extended Higgs sector. Although stringently constrained by the LHC run-1 data, a non-minimal Higgs sector is theoretically very attractive and, if confirmed, would shine light on the mechanism of electroweak symmetry breaking (EWSB). Followed by a historical review of the birth of the Higgs boson, this volume supplies a brief introduction to SM Higgs boson physics and topical issues on Higgs searches at the LHC. An updated overview of the property analysis for the newly-discovered 125 GeV Higgs and other beyond-the-SM (BSM) Higgs bosons will be presented. We will also discuss its implications for various BSM Higgs models without and within the framework of supersymmetry (SUSY). The two-Higgs-doublet model (2HDM) is a very simple and appealing framework for such considerations. Either of the two CP-even Higgs bosons in the Type I and II 2HDM is able to provide a consistent description of the LHC Higgs signal. I will illustrate its status after LHC run-1 analysis and present the prediction for higher precision at the run-2. Given the very SM-like nature of this discovered particle, one often considers the decoupling limit in which the lightest one is the SM-like Higgs boson discovered at the LHC while others are very heavy. However, such a SM-like scalar Higgs boson can also be obtained in the alignment limit without the masses of other Higgs being large. In particular, I will address the seemingly extreme case in which there is a (pseudoscalar) Higgs light enough so that the SM-like state would have a rare decay mode. Finally, the results achieved in the case of alignment will be compared to those present in the decoupling limit and the prospects for searching for non-SM Higgs bosons at future experiments will be discussed in detail.In the framework of supersymmetry, the next-to-minimal supersymmetric SM (NMSSM) that has been widely studied is a most promising possibility because it allows for less fine-tuning. Following an analysis of the theoretical structure of this model, we first assessed the extent to which various semi-constrained NMSSM (scNMSSM) scenarios with one of the CP-even Higgs bosons, h1 (the lightest) or h2 (the second lightest), are able to describe the LHC signal as a SM-like Higgs. Meanwhile, if the h1 and h2 are approximately degenerate in mass then an enhancement of the di-photon signal is very possible, although a SM-like level is also easily achieved. To experimentally probe the possibility of degeneracy, we developed diagnostic tools that could discriminate whether or not there are two (or more) Higgs bosons versus just one contributing to the LHC signals at 125 GeV. In addition, we considered the case where the h1 provides a consistent description of the small LEP excess at 98 GeV whereas the h2 possesses the primary features of the LHC Higgs-like signals at 125 GeV. Beyond the SM, the Higgs sector and dark matter (DM) sector may be intimately connected. With protection by an extra discrete symmetry, a certain non-SM scalar boson (Higgs partner) could be a possible DM candidate. As typical examples, we consider the lightest neutralino supersymmetric DM and the Higgs-portal scalar DM in the singlet extension of the 2HDM (2HDMS) together with presenting a decent description of the models. In both cases, implications for DM physics are discussed in various scenarios. Intriguingly, violating the isospin symmetry in the DM interaction with nucleons could result in a large suppression of the DM-nucleon cross section, approaching a level that is hardly reachable by many ambitious projects for DM direct detection. Given this dramatic change in the analysis of DM direct detection, I include an in-depth examination of this possibility in the generic Higgs-portal DM model.
Book Synopsis How and where to Go Beyond the Standard Model by : Antonino Zichichi
Download or read book How and where to Go Beyond the Standard Model written by Antonino Zichichi and published by World Scientific. This book was released on 2007 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is a collection of lectures given during the 42nd Course of the International School of Subnuclear Physics. The contributions cover the most recent advances in theoretical physics and the latest results from current experimental facilities.In line with one of the aims of the school, which is to encourage and promote young physicists to achieve recognition at an international level, the students' recognized for their research excellence were given the opportunity to publish their work in this volume. Their contributions are joined by those from many distinguished lecturers in the field from around the world.
Book Synopsis Search for the Standard Model Higgs Boson in the H → ZZ → l + l - qq Decay Channel at CMS by : Francesco Pandolfi
Download or read book Search for the Standard Model Higgs Boson in the H → ZZ → l + l - qq Decay Channel at CMS written by Francesco Pandolfi and published by Springer Science & Business Media. This book was released on 2013-08-15 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: The theoretical foundations of the Standard Model of elementary particles relies on the existence of the Higgs boson, a particle which has been revealed for the first time by the experiments run at the Large Hadron Collider (LHC) in 2012. As the Higgs boson is an unstable particle, its search strategies were based on its decay products. In this thesis, Francesco Pandolfi conducted a search for the Higgs boson in the H → ZZ → l + l - qq Decay Channel with 4.6 fb -1 of 7 TeV proton-proton collision data collected by the Compact Muon Solenoid (CMS) experiment. The presence of jets in the final state poses a series of challenges to the experimenter: both from a technical point of view, as jets are complex objects and necessitate of ad-hoc reconstruction techniques, and from an analytical one, as backgrounds with jets are copious at hadron colliders, therefore analyses must obtain high degrees of background rejection in order to achieve competitive sensitivity. This is accomplished by following two directives: the use of an angular likelihood discriminant, capable of discriminating events likely to originate from the decay of a scalar boson from non-resonant backgrounds, and by using jet parton flavor tagging, selecting jets compatible with quark hadronization and discarding jets more likely to be initiated by gluons. The events passing the selection requirements in 4.6 fb -1 of data collected by the CMS detector are examined, in the search of a possible signal compatible with the decay of a heavy Higgs boson. The thesis describes the statistical tools and the results of this analysis. This work is a paradigm for studies of the Higgs boson with final states with jets. The non-expert physicists will enjoy a complete and eminently readable description of a proton-proton collider analysis. At the same time, the expert reader will learn the details of the searches done with jets at CMS.
Book Synopsis The theory and discovery of the Higgs boson by : Siyuan Chen
Download or read book The theory and discovery of the Higgs boson written by Siyuan Chen and published by GRIN Verlag. This book was released on 2014-09-17 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bachelor Thesis from the year 2013 in the subject Physics - Theoretical Physics, grade: 71 points, King`s College London, language: English, abstract: An overview of the steps that lead to the discovery of the Higgs boson is presented. Starting with the theoretical background framework, the Standard Model of particel physics, the Higgs field will be introduced as an addition. This extra field provides the mechanism for spontaneous symmetry breaking, that is needed to explain the existence of massive particles. An overview of the steps of the experimental search to the discovery of the Higgs boson is given in the second part of this article. Its mass has been measured to be 125.4 ± 0.4(stat) ± 0.5(sys) GeV. The Standard Model is briefly summarised. The Higgs mechanism is derived from an Abelian Model, applied to the gauge bosons of the electroweak model of Weinberg and Salam. A simple estimate of the Higgs mass is given by its derivation and the estimation of its self-coupling and vacuum expectation value. Experimental results will be presented from the CMS and ATLAS detectors at the LHC, alongside with a description of the Large Hadron Collider at CERN and possible directions for future experiments beyond the Standard Model.
Book Synopsis Supersymmetry, Supergravity And Supercolliders (Tasi 1997) by : Jonathon A Bagger
Download or read book Supersymmetry, Supergravity And Supercolliders (Tasi 1997) written by Jonathon A Bagger and published by World Scientific. This book was released on 1999-03-12 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt: In June 1997, fifty-seven of the world's best students gathered at TASI '97 in Boulder, Colorado, USA, to attend an intensive series of lectures on the theory and phenomenology of supersymmetry, supergravity and supercolliders. This book contains the proceedings of that school. It is aimed at advanced graduate students as well as postdoctoral and other researchers. It provides a snapshot of the state-of-the-art in an active area of high energy particle theory, and may perhaps serve as a preview of physics to be discovered in the next decade.
Book Synopsis The Higgs Boson Produced With Top Quarks in Fully Hadronic Signatures by : Daniel Salerno
Download or read book The Higgs Boson Produced With Top Quarks in Fully Hadronic Signatures written by Daniel Salerno and published by Springer Nature. This book was released on 2019-10-25 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work presented in this PhD dissertation is the first search at CMS for Higgs bosons produced in association with top quarks (ttH) in a final state consisting of only jets. The results presented in this book uncover a new class of ttH events that will help us elucidate our understanding of the Yukawa sector interactions between the Higgs boson and the top quark. Despite this being the most common decay signature for ttH, a large contamination of SM backgrounds makes it the most challenging for extracting a signal from data. The PhD thesis presents many sophisticated tools and techniques that were developed in order to overcome these challenges. These tools pave the way for future analyses to investigate other standard model and beyond-standard model physics.
