Combinatorial Kalman Filter and High Level Trigger Reconstruction for the Belle II Experiment

Combinatorial Kalman Filter and High Level Trigger Reconstruction for the Belle II Experiment
Title Combinatorial Kalman Filter and High Level Trigger Reconstruction for the Belle II Experiment PDF eBook
Author Nils Braun
Publisher Springer
Pages 186
Release 2019-08-06
Genre Science
ISBN 3030249972

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Combinatorial Kalman filters are a standard tool today for pattern recognition and charged particle reconstruction in high energy physics. In this thesis the implementation of the track finding software for the Belle II experiment and first studies on early Belle II data are presented. The track finding algorithm exploits novel concepts such as multivariate track quality estimates to form charged trajectory hypotheses combining information from the Belle II central drift chamber with the inner vertex sub-detectors. The eventual track candidates show an improvement in resolution on the parameters describing their spatial and momentum properties by up to a factor of seven over the former legacy implementation. The second part of the thesis documents a novel way to determine the collision event null time T0 and the implementation of optimisation steps in the online reconstruction code, which proved crucial in overcoming the high level trigger limitations.

Pattern Recognition, Tracking and Vertex Reconstruction in Particle Detectors

Pattern Recognition, Tracking and Vertex Reconstruction in Particle Detectors
Title Pattern Recognition, Tracking and Vertex Reconstruction in Particle Detectors PDF eBook
Author Rudolf Frühwirth
Publisher Springer Nature
Pages 208
Release 2021
Genre Electronic books
ISBN 303065771X

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This open access book is a comprehensive review of the methods and algorithms that are used in the reconstruction of events recorded by past, running and planned experiments at particle accelerators such as the LHC, SuperKEKB and FAIR. The main topics are pattern recognition for track and vertex finding, solving the equations of motion by analytical or numerical methods, treatment of material effects such as multiple Coulomb scattering and energy loss, and the estimation of track and vertex parameters by statistical algorithms. The material covers both established methods and recent developments in these fields and illustrates them by outlining exemplary solutions developed by selected experiments. The clear presentation enables readers to easily implement the material in a high-level programming language. It also highlights software solutions that are in the public domain whenever possible. It is a valuable resource for PhD students and researchers working on online or offline reconstruction for their experiments.

The Nature of the Atom

The Nature of the Atom
Title The Nature of the Atom PDF eBook
Author J.E. Kaal
Publisher SCB Distributors
Pages 207
Release 2022-03-01
Genre Science
ISBN 1838128042

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This book is the result of an international research team pursuing the intuitive notion that the atomic nucleus should have structural properties. Starting with a few logical assumptions, they discovered that many properties of the atom and the nucleus can be explained rationally without resorting to quantum mechanics or the limiting dogmas about the nucleus that dominate current physics. Using feedback from known experimental data, they identified several organizational principles that nature appears to use for constructing the elements, sometimes in unexpected ways. There are two assumptions underlying the Structured Atom Model (SAM). First, by replacing the neutron with a proton–electron pair, an electrostatic attractive force is reintroduced into the nucleus. The electrons acting as “glue” between the protons. Second, that “spherical dense packing” gives the nucleus its fractal shape—one of several organizational drivers in the buildup of the nucleus; other drivers being recurring substructures called “endings” and “nuclets.” A SAM nucleus is constructed using these substructures in various combinations. The result is a new periodic table that hints at several missing elements most of which are suspected to be unstable, but probably not all. What emerges is nothing less than a new paradigm for thinking about the nucleus and physics. In SAM, several known nuclear phenomena follow directly from the structural configuration of the nucleus, including nuclear instability, radioactivity/radioactive decay, the asymmetrical breakup of fission products, and the various nuclear decay schemes. In addition, the team discovered an unrecognized store of energy that may very well be responsible for Low Energy Nuclear Reactions (LENR).

Handbook of Particle Detection and Imaging

Handbook of Particle Detection and Imaging
Title Handbook of Particle Detection and Imaging PDF eBook
Author Claus Grupen
Publisher Springer Science & Business Media
Pages 1251
Release 2012-01-08
Genre Science
ISBN 3642132715

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The handbook centers on detection techniques in the field of particle physics, medical imaging and related subjects. It is structured into three parts. The first one is dealing with basic ideas of particle detectors, followed by applications of these devices in high energy physics and other fields. In the last part the large field of medical imaging using similar detection techniques is described. The different chapters of the book are written by world experts in their field. Clear instructions on the detection techniques and principles in terms of relevant operation parameters for scientists and graduate students are given.Detailed tables and diagrams will make this a very useful handbook for the application of these techniques in many different fields like physics, medicine, biology and other areas of natural science.

B Decays

B Decays
Title B Decays PDF eBook
Author Sheldon Stone
Publisher World Scientific
Pages 676
Release 1994
Genre Science
ISBN 9789810218362

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This 2nd edition is an extensive update of "B Decays?. The revisions are necessary because of the extensive amount of new data and new theoretical ideas. This book reviews what is known about b-quark decays and also looks at what can be learned in the future.The importance of this research area is increasing, as evidenced by the approval of the luminosity upgrade for CESR and the asymmetric B factories at SLAC and KEK, and the possibility of experiments at hadron colliders.The key experimental observations made thus far, measurement of the lifetimes of the different B species, B0-B0 mixing, the discovery of ?Penguin? mediated decays, and the extraction of the CKM matrix elements Vub and Vcb from semileptonic decays, as well as more mundane results, are described in great detail by the experimentalists who have been closely involved with making the measurements. Theoretical progress in understanding b-quark decays using HQET and lattice gauge techniques are described by theorists who have developed and used these techniques.Synthesizing the experimental and theoretical information, several articles discuss the implications for the ?Standard Model? and how further tests can be done using measurements of CP violation in the B system.

Annals of Scientific Society for Assembly, Handling and Industrial Robotics 2021

Annals of Scientific Society for Assembly, Handling and Industrial Robotics 2021
Title Annals of Scientific Society for Assembly, Handling and Industrial Robotics 2021 PDF eBook
Author Thorsten Schüppstuhl
Publisher Springer Nature
Pages 400
Release 2021
Genre Robots, Industrial
ISBN 3030740323

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This Open Access proceedings presents a good overview of the current research landscape of assembly, handling and industrial robotics. The objective of MHI Colloquium is the successful networking at both academic and management level. Thereby, the colloquium focuses an academic exchange at a high level in order to distribute the obtained research results, to determine synergy effects and trends, to connect the actors in person and in conclusion, to strengthen the research field as well as the MHI community. In addition, there is the possibility to become acquatined with the organizing institute. Primary audience is formed by members of the scientific society for assembly, handling and industrial robotics (WGMHI). The Editors Prof. Dr.-Ing. Thorsten Schüppstuhl is head of the Institute of Aircraft Production Technology (IFPT) at the Hamburg University of Technology. Prof. Dr.-Ing. Kirsten Tracht is head of the Bremen Institute for Mechanical Engineering (bime) at the University of Bremen. Prof. Dr.-Ing. Annika Raatz is head of the Institute of Assembly Technology (match) at the Leibniz University Hannover.

The Physics of the B Factories

The Physics of the B Factories
Title The Physics of the B Factories PDF eBook
Author Adrian Bevan
Publisher Springer
Pages 0
Release 2015-03-23
Genre Science
ISBN 9783662449905

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This comprehensive work thoroughly introduces and reviews the set of results from Belle and BaBar - after more than two decades of independent and complementary work - all the way from the detectors and the analysis tools used, up to the physics results, and the interpretation of these results. The world’s two giant B Factory collaborations, Belle at KEK and BaBar at SLAC, have successfully completed their main mission to discover and quantify CP violation in the decays of B mesons. CP violation is a necessary requirement to distinguish unambiguously between matter and antimatter. The shared primary objective of the two B Factory experiments was to determine the shape of the so-called unitarity triangle, an abstract triangle representing interactions of quarks, the elementary constituents of matter. The area of the triangle is a measure of the amount of CP violation associated with the weak force. Many other measurements have been performed by the B Factories and are also discussed in this work.