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Exclusive Phi Production Beam Spin Asymmetry Measurements With Clas12
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Book Synopsis Exclusive Phi Production Beam Spin Asymmetry Measurements with CLAS12 by : Brandon Clary
Download or read book Exclusive Phi Production Beam Spin Asymmetry Measurements with CLAS12 written by Brandon Clary and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of the beam spin asymmetry (BSA) of the exclusive electroproduction of the vector phi(1020) meson through its decay into charged Kaons have been performed. The data set used was based on the RG-A run period from the recently upgraded CEBAF Large Acceptance Spectrometer (CLAS12) in Hall B at Jefferson National Lab (JLab). The run period used a 10.6 GeV longitudinally polarized electron beam and an unpolarized hydrogen target. The available statistics collected allow for detailed studies of the W, -t, xB, and Q2 dependencies of the BSA amplitudes from phi production. The BSA measurements will shed light on the exchange mechanisms responsible for phi production at JLab energies. In this dissertation, a non-zero BSA is observed, which suggests a possible enhancement of pseudo-scalar exchange mechanism near production threshold. Therefore, the non-zero BSA may be a result of the interference of the pseudo-scalar exchange mechanism with a scalar one. Ultimately, information on the dominant exchange mechanism will aid in the development of a Generalized Parton Distribution (GPD) based description of these processes in the context of hard to soft transition.
Book Synopsis Beam Spin Asymmetry Measurements from Deeply Virtual Meson Production by : Bo Zhao
Download or read book Beam Spin Asymmetry Measurements from Deeply Virtual Meson Production written by Bo Zhao and published by . This book was released on 2008 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis First Measurement of the Beam Normal Single Spin Asymmetry in $[Delta]$ Resonance Production by $Q_{\rm Weak}$ by :
Download or read book First Measurement of the Beam Normal Single Spin Asymmetry in $[Delta]$ Resonance Production by $Q_{\rm Weak}$ written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The beam normal single spin asymmetry ($B_{\rm n}$) is generated in the scattering of transversely polarized electrons from unpolarized nuclei. The asymmetry arises from the interference of the imaginary part of the two-photon exchange with the one-photon exchange amplitude. The $Q_{\rm weak}$ experiment has made the first measurement of $B_{\rm n}$ in the production of the $\Delta$(1232) resonance, using the $Q_{\rm weak}$ apparatus in Hall-C at the Thomas Jefferson National Accelerator Facility. The final transverse asymmetry, corrected for backgrounds and beam polarization, is $B_{\rm n}$ = 43 $\pm$ 16 ppm at beam energy 1.16 GeV at an average scattering angle of about 8.3 degrees, and invariant mass of 1.2 GeV. The measured preliminary $B_{\rm n}$ agrees with a preliminary theoretical calculation. $B_{\rm n}$ for the $\Delta$ is the only known observable that is sensitive to the $\Delta$ elastic form-factors ($\gamma$*$\Delta\Delta$) in addition to the generally studied transition form-factors ($\gamma$*N$\Delta$), but extracting this information will require significant theoretical input.
Book Synopsis Beam Spin Asymmetry Measurements in Deeply Virtual Compton Scattering by : Gagik Gavalian
Download or read book Beam Spin Asymmetry Measurements in Deeply Virtual Compton Scattering written by Gagik Gavalian and published by . This book was released on 2004 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Beam Spin Asymmetry in Deep and Exclusive Pi0 Electroproduction by :
Download or read book Beam Spin Asymmetry in Deep and Exclusive Pi0 Electroproduction written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The beam spin asymmetry (BSA) in the exclusive reaction ep->ep pi0 was measured with the CEBAF 5.77 GeV polarized electron beam and Large Acceptance Spectrometer(CLAS). The xB, Q2, t and phi dependences of the pi0 BSA are presented in the deep inelastic regime. The asymmetries are fitted with a sin[phi] function and their amplitudes are extracted. Overall, they are of the order of 0.04 - 0.11 and roughly independent of t. This is the signature of a non-zero longitudinal-transverse interference. The implications concerning the applicability of a formalism based on generalized parton distributions, as well as the extension of a Regge formalism at high photon virtualities, are discussed.
Book Synopsis Beam-, Target- and Double-spin Asymmetry Measurements in Deeply Virtual Π0, Π+ and Π- Meson Production by : Gavin William Murdoch
Download or read book Beam-, Target- and Double-spin Asymmetry Measurements in Deeply Virtual Π0, Π+ and Π- Meson Production written by Gavin William Murdoch and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Beam-spin Asymmetries from Semi-inclusive Pion Electroproduction by :
Download or read book Beam-spin Asymmetries from Semi-inclusive Pion Electroproduction written by and published by . This book was released on 2014 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have measured the moment A{sup sin?}{sub LU} corresponding to the polarized electron beam-spin asymmetry in SIDIS. A{sup sin?}{sub LU} is a twist-3 quantity providing information about quark-gluon correlations. Data were taken with the CLAS Spectrometer at Jefferson Lab using a 5.498 GeV longitudinally polarized electron beam and an unpolarized liquid hydrogen target. All three pion channels (pi, pi° and pi−) were measured simultaneously over a large range of kinematics within the virtuality range Q2 ̃1.0-4.5 GeV2. The observable was measured with good statistical precision over a large range of z, P{sub T}, x{sub B}, and Q2, which permits comparison with several reaction models. The discussed measurements provide an upgrade in statistics over previous measurements, and serve as the first evidence for the negative sign of the?− sin? Moment.
Book Synopsis Single-spin Beam Asymmetry in Semi-exclusive Deep-inelastic Electroproduction by : C. E. Carlson
Download or read book Single-spin Beam Asymmetry in Semi-exclusive Deep-inelastic Electroproduction written by C. E. Carlson and published by . This book was released on 2003 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent measurements from Jefferson Lab show significant beam single spin asymmetries in deep inelastic scattering. The asymmetry is due to interference of longitudinal and transverse photoabsorption amplitudes which have different phases induced by the final-state interaction between the struck quark and the target spectators. We developed a dynamical model for a single-spin beam asymmetry in deep-inelastic scattering. Our results are consistent with the experimentally observed magnitude of this effect. We conclude that similar mechanisms involving quark orbital angular momentum ('Sivers effect') are responsible for both target and beam single-spin asymmetries.
Book Synopsis Beam Single-Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering by :
Download or read book Beam Single-Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We calculate, in a model, the beam spin asymmetry in semi-inclusive jet production in deep inelastic scattering. This twist-3, $T$-odd observable is non-zero due to final state strong interactions. With reasonable choices for the parameters, one finds an asymmetry of several percent, about the size seen experimentally. We present the result both as an explicit asymmetry calculation and as a model calculation of the new transverse-momentum dependent distribution function $g^\perp$.
Book Synopsis Determination of the Beam-spin Asymmetry of Deuteron Photodisintegration in the Energy Region E[gamma] by :
Download or read book Determination of the Beam-spin Asymmetry of Deuteron Photodisintegration in the Energy Region E[gamma] written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The beam-spin asymmetry, [Sigma], for the reaction [gamma]d→[Sigma][Sigma]pn has been measured using the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility (JLab) for six photon-energy bins, between 1.1 and 2.3 GeV, and proton angles in the center-of-mass frame, [Theta]c.m., between 25° and 160°. These are the first measurements of beam-spin asymmetries at [Theta]c.m.=90° for photon-beam energies above 1.6 GeV, and the first measurements for angles other than [Theta]c.m.=90°. The angular and energy dependence of [Sigma] is expected to aid in the development of QCD-based models to understand the mechanisms of deuteron photodisintegration in the transition region between hadronic and partonic degrees of freedom, where both effective field theories and perturbative QCD cannot make reliable predictions.
Author :International Union of Pure and Applied Chemistry. Physical and Biophysical Chemistry Division Publisher :Royal Society of Chemistry ISBN 13 :0854044337 Total Pages :240 pages Book Rating :4.8/5 (54 download)
Book Synopsis Quantities, Units and Symbols in Physical Chemistry by : International Union of Pure and Applied Chemistry. Physical and Biophysical Chemistry Division
Download or read book Quantities, Units and Symbols in Physical Chemistry written by International Union of Pure and Applied Chemistry. Physical and Biophysical Chemistry Division and published by Royal Society of Chemistry. This book was released on 2007 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prepared by the IUPAC Physical Chemistry Division this definitive manual, now in its third edition, is designed to improve the exchange of scientific information among the readers in different disciplines and across different nations. This book has been systematically brought up to date and new sections added to reflect the increasing volume of scientific literature and terminology and expressions being used. The Third Edition reflects the experience of the contributors with the previous editions and the comments and feedback have been integrated into this essential resource. This edition has been compiled in machine-readable form and will be available online.
Book Synopsis The Cambridge Handbook of Physics Formulas by : Graham Woan
Download or read book The Cambridge Handbook of Physics Formulas written by Graham Woan and published by Cambridge University Press. This book was released on 2000-07-10 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Cambridge Handbook of Physics Formulas is a quick-reference aid for students and professionals in the physical sciences and engineering. It contains more than 2000 of the most useful formulas and equations found in undergraduate physics courses, covering mathematics, dynamics and mechanics, quantum physics, thermodynamics, solid state physics, electromagnetism, optics and astrophysics. An exhaustive index allows the required formulas to be located swiftly and simply, and the unique tabular format crisply identifies all the variables involved. The Cambridge Handbook of Physics Formulas comprehensively covers the major topics explored in undergraduate physics courses. It is designed to be a compact, portable, reference book suitable for everyday work, problem solving or exam revision. All students and professionals in physics, applied mathematics, engineering and other physical sciences will want to have this essential reference book within easy reach.
Book Synopsis Handbook of Modern Sensors by : Jacob Fraden
Download or read book Handbook of Modern Sensors written by Jacob Fraden and published by Springer Science & Business Media. This book was released on 2006-04-29 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seven years have passed since the publication of the previous edition of this book. During that time, sensor technologies have made a remarkable leap forward. The sensitivity of the sensors became higher, the dimensions became smaller, the sel- tivity became better, and the prices became lower. What have not changed are the fundamental principles of the sensor design. They are still governed by the laws of Nature. Arguably one of the greatest geniuses who ever lived, Leonardo Da Vinci, had his own peculiar way of praying. He was saying, “Oh Lord, thanks for Thou do not violate your own laws. ” It is comforting indeed that the laws of Nature do not change as time goes by; it is just our appreciation of them that is being re?ned. Thus, this new edition examines the same good old laws of Nature that are employed in the designs of various sensors. This has not changed much since the previous edition. Yet, the sections that describe the practical designs are revised substantially. Recent ideas and developments have been added, and less important and nonessential designs were dropped. Probably the most dramatic recent progress in the sensor technologies relates to wide use of MEMS and MEOMS (micro-electro-mechanical systems and micro-electro-opto-mechanical systems). These are examined in this new edition with greater detail. This book is about devices commonly called sensors. The invention of a - croprocessor has brought highly sophisticated instruments into our everyday lives.
Book Synopsis Diagnostic Radiology Physics by : International Atomic Energy Agency
Download or read book Diagnostic Radiology Physics written by International Atomic Energy Agency and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication is aimed at students and teachers involved in programmes that train medical physicists for work in diagnostic radiology. It provides a comprehensive overview of the basic medical physics knowledge required in the form of a syllabus for the practice of modern diagnostic radiology. This makes it particularly useful for graduate students and residents in medical physics programmes. The material presented in the publication has been endorsed by the major international organizations and is the foundation for academic and clinical courses in both diagnostic radiology physics and in emerging areas such as imaging in radiotherapy.
Book Synopsis BIOS Instant Notes in Physical Chemistry by : Gavin Whittaker
Download or read book BIOS Instant Notes in Physical Chemistry written by Gavin Whittaker and published by Garland Science. This book was released on 2000-06-15 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Instant Notes in Physical Chemistry introduces the various aspects of physical chemistry in an order that gives the opportunity for continuous reading from front to back. The background to a range of important techniques is in incorporated to reflect the wide application of the subject matter. This book provides the key to the understanding and learning of physical chemistry.
Download or read book Polymer Solutions written by Iwao Teraoka and published by John Wiley & Sons. This book was released on 2004-04-07 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer Solutions: An Introduction to Physical Properties offers a fresh, inclusive approach to teaching the fundamentals of physical polymer science. Students, instructors, and professionals in polymer chemistry, analytical chemistry, organic chemistry, engineering, materials, and textiles will find Iwao Teraoka’s text at once accessible and highly detailed in its treatment of the properties of polymers in the solution phase. Teraoka’s purpose in writing Polymer Solutions is twofold: to familiarize the advanced undergraduate and beginning graduate student with basic concepts, theories, models, and experimental techniques for polymer solutions; and to provide a reference for researchers working in the area of polymer solutions as well as those in charge of chromatographic characterization of polymers. The author’s incorporation of recent advances in the instrumentation of size-exclusion chromatography, the method by which polymers are analyzed, renders the text particularly topical. Subjects discussed include: Real, ideal, Gaussian, semirigid, and branched polymer chains Polymer solutions and thermodynamics Static light scattering of a polymer solution Dynamic light scattering and diffusion of polymers Dynamics of dilute and semidilute polymer solutions Study questions at the end of each chapter not only provide students with the opportunity to test their understanding, but also introduce topics relevant to polymer solutions not included in the main text. With over 250 geometrical model diagrams, Polymer Solutions is a necessary reference for students and for scientists pursuing a broader understanding of polymers.
Book Synopsis The Principles of Quantum Mechanics by : Paul Adrien Maurice Dirac
Download or read book The Principles of Quantum Mechanics written by Paul Adrien Maurice Dirac and published by Oxford University Press. This book was released on 1981 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first edition of this work appeared in 1930, and its originality won it immediate recognition as a classic of modern physical theory. The fourth edition has been bought out to meet a continued demand. Some improvements have been made, the main one being the complete rewriting of the chapter on quantum electrodymanics, to bring in electron-pair creation. This makes it suitable as an introduction to recent works on quantum field theories.