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Author: Patrick L.S. Connor
Publisher: Springer Nature
Published: 2019-11-29
Total Pages: 325
ISBN-13: 3030343839
DOWNLOAD EBOOK^ 74 GeV and |y| 2.4; the b jets must contain a B hadron. The measurement has significant statistics up to p T ∼ O(TeV). Advanced methods of unfolding are performed to extract the signal. It is found that fixed-order calculations with underlying event describe the measurement well.
Author: Shota Tsiskaridze
Publisher: Springer
Published: 2017-08-02
Total Pages: 248
ISBN-13: 3319634143
DOWNLOAD EBOOKThis PhD thesis focuses on the search for flavor-changing neutral currents in the decay of a top quark to an up-type quark (q = u, c) and the Standard Model Higgs boson, where the Higgs boson decays to bb. Further, the thesis presents the combination of this search for top quark pair events with other ATLAS searches – in the course of which the most restrictive bounds to date on tqH interactions were obtained. Following on from the discovery of the Higgs boson, it is particularly important to measure the Yukawa couplings of the Standard Model fermions; these parameters may provide crucial insights to help solve the flavor puzzle and may help reveal the presence of new physics before it is directly observed in experiments.
Author: Manish K. Sethi
Publisher: Springer Science & Business Media
Published: 2012-08-15
Total Pages: 444
ISBN-13: 1461435110
DOWNLOAD EBOOKPhysicians are under increasing pressure to provide quality health care in the most cost-effective way possible. The escalating costs of orthopedic care are driving the need to base clinical decision making on evidence-based data that will help physicians provide optimal care to every patient. Evidence-based medicine is the future of orthopedic surgery. In a world where the quality of surgical outcomes will be increasingly measured, evidence-based data will heavily guide decision making in orthopedic trauma. Orthopedic Traumatology: An Evidence-Based Approach provides the reader with a focused and comprehensive review of the literature surrounding the management of the orthopedic trauma patient. The book centers around clinical scenarios with each chapter based on a specific case. Renowned orthopedic trauma surgeons from across the country serve as contributing authors, writing based on these scenarios and giving their expert opinions on management while using data as their guide. Each chapter describes and summarizes the data, but achieves this objective in a case-based format. Each case is brief, but includes relevant imaging. The case scenarios are heavily weighted toward treatment of more controversial injuries. As there is currently no book on the market that focuses solely on orthopedic trauma and evidence-based medicine, this book is sure to be a useful reference for residents and practicing physicians alike.
Author: Chunhui Han
Publisher:
Published: 2003
Total Pages: 298
ISBN-13:
DOWNLOAD EBOOKAuthor: Wei Wang
Publisher: World Scientific
Published: 2020-02-27
Total Pages: 576
ISBN-13: 9811207410
DOWNLOAD EBOOKThe latest of the 'Lepton Photon' symposium, one of the well-established series of meetings in the high-energy physics community, was successfully organized at the South Campus of Sun Yat-sen University, Guangzhou, China, from August 7-12, 2017, where physicists around the world gathered to discuss the latest advancements in the research field.This proceedings volume of the Lepton Photon 2017 collects contributions by the plenary session speakers and the posters' presenters, which cover the latest results in particle physics, nuclear physics, astrophysics, cosmology, and plans for future facilities.
Author: Markus Zinser
Publisher: Springer
Published: 2018-09-25
Total Pages: 386
ISBN-13: 3030006506
DOWNLOAD EBOOKThis book presents two analyses, the first of which involves the search for a new heavy charged gauge boson, a so-called W' boson. This new gauge boson is predicted by some theories extending the Standard Model gauge group to solve some of its conceptual problems. Decays of the W' boson in final states with a lepton (l± = e± , μ±) and the corresponding (anti-)neutrino are considered. Data collected by the ATLAS experiment in 2015 at a center of mass energy of √s =13 TeV is used for the analysis. In turn, the second analysis presents a measurement of the double-differential cross section of the process pp->Z/gamma^* + X -> l^+l^- + X, including a gamma gamma induced contribution, at a center of mass energy of sqrt{s} = 8 TeV. The measurement is performed in an invariant mass region of 116 GeV to 1500 GeV as a function of invariant mass and absolute rapidity of the l^+l^-- pair, and as a function of invariant mass and pseudorapidity separation of the l^+l^-- pair. The data analyzed was recorded by the ATLAS experiment in 2012 and corresponds to an integrated luminosity of 20.3/fb. It is expected that the measured cross sections are sensitive to the PDFs at very high values of the Bjorken-x scaling variable, and to the photon structure of the proton.
Author: Luca Cadamuro
Publisher: Springer
Published: 2018-12-06
Total Pages: 283
ISBN-13: 3030040550
DOWNLOAD EBOOKThis thesis presents innovative contributions to the CMS experiment in the new trigger system for the restart of the LHC collisions in Run II, as well as original analysis methods and important results that led to official publications of the Collaboration. The author's novel reconstruction algorithms, deployed on the Field-Programmable Gate Arrays of the new CMS trigger architecture, have brought a gain of over a factor 2 in efficiency for the identification of tau leptons, with a very significant impact on important H boson measurements, such as its decays to tau lepton pairs and the search for H boson pair production. He also describes a novel analysis of HH → bb tautau, a high priority physics topic in a difficult channel. The original strategy, optimisation of event categories, and the control of the background have made the result one of the most sensitive concerning the self-coupling of the Higgs boson among all possible channels at the LHC.
Author: Simone Marzani
Publisher: Springer
Published: 2019-05-11
Total Pages: 210
ISBN-13: 3030157091
DOWNLOAD EBOOKThis concise primer reviews the latest developments in the field of jets. Jets are collinear sprays of hadrons produced in very high-energy collisions, e.g. at the LHC or at a future hadron collider. They are essential to and ubiquitous in experimental analyses, making their study crucial. At present LHC energies and beyond, massive particles around the electroweak scale are frequently produced with transverse momenta that are much larger than their mass, i.e., boosted. The decay products of such boosted massive objects tend to occupy only a relatively small and confined area of the detector and are observed as a single jet. Jets hence arise from many different sources and it is important to be able to distinguish the rare events with boosted resonances from the large backgrounds originating from Quantum Chromodynamics (QCD). This requires familiarity with the internal properties of jets, such as their different radiation patterns, a field broadly known as jet substructure. This set of notes begins by providing a phenomenological motivation, explaining why the study of jets and their substructure is of particular importance for the current and future program of the LHC, followed by a brief but insightful introduction to QCD and to hadron-collider phenomenology. The next section introduces jets as complex objects constructed from a sequential recombination algorithm. In this context some experimental aspects are also reviewed. Since jet substructure calculations are multi-scale problems that call for all-order treatments (resummations), the bases of such calculations are discussed for simple jet quantities. With these QCD and jet physics ingredients in hand, readers can then dig into jet substructure itself. Accordingly, these notes first highlight the main concepts behind substructure techniques and introduce a list of the main jet substructure tools that have been used over the past decade. Analytic calculations are then provided for several families of tools, the goal being to identify their key characteristics. In closing, the book provides an overview of LHC searches and measurements where jet substructure techniques are used, reviews the main take-home messages, and outlines future perspectives.
Author: Harrison B. Prosper
Publisher:
Published: 2011
Total Pages: 323
ISBN-13: 9789290833673
DOWNLOAD EBOOKAuthor: R. G. Roberts
Publisher: Cambridge University Press
Published: 1993-11-26
Total Pages: 200
ISBN-13: 9780521449441
DOWNLOAD EBOOKThis graduate/research level book describes our present knowledge of protons and neutrons, the particles which make up the nucleus of the atom. Experiments using high energy electrons, muons and neutrinos reveal the proton as being made up of point-like constituents, quarks. The strong forces which bind the quarks together are described in terms of the modern theory of quantum chromodynamics (QCD), the â€~glue' binding the quarks being mediated by new constituents called gluons. Larger and new particle accelerators probe the interactions between quarks and gluons at shorter distances. The understanding of this detailed substructure and of the fundamental forces responsible is one of the keys to unravelling the physics of the structure of matter. This book will be of interest to all theoretical and experimental particle physicists.
