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Exclusive Pi0 Electroproduction At W 2 Gev With Clas
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Book Synopsis Exclusive Pi0̂ Electroproduction at W] 2 GeV with CLAS. by :
Download or read book Exclusive Pi0̂ Electroproduction at W] 2 GeV with CLAS. written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Exclusive neutral-pion electroproduction (ep-->e'p'pi0) was measured at Jefferson Lab with a 5.75-GeV electron beam and the CLAS detector. Differential cross sections d4sigma/dtdQ2dxBdphipi and structure functions sigmaT+epsilonsigmaL, sigmaTT and?LT as functions of t were obtained over a wide range of Q2 and xB. The data are compared with Regge and handbag theoretical calculations. Analyses in both frameworks find that a large dominance of transverse processes is necessary to explain the experimental results. For the Regge analysis it is found that the inclusion of vector meson rescattering processes is necessary to bring the magnitude of the calculated and measured structure functions into rough agreement. In the handbag framework, there are two independent calculations, both of which appear to roughly explain the magnitude of the structure functions in terms of transversity generalized parton distributions.
Book Synopsis Precision Measurement of Electroproduction of Pi0 Near Threshold by :
Download or read book Precision Measurement of Electroproduction of Pi0 Near Threshold written by and published by . This book was released on 2012 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electromagnetic production of neutral pions near threshold is the most basic, lowest energy reaction in which a new hadron is created. The electromagnetic interaction is well understood so measurements of this reaction can yield direct insight into the hadronic production mechanism. During the past three decades there have been many developments in both the measurement and theory of threshold pion production, starting with measurements of photo-production at Saclay in 1986 and at Mainz in 1990. These measurements indicated a surprising discrepancy with so-called Low Energy Theorems (LETs) which are based on quite fundamental symmetries and considerations. Chiral Perturbation Theory (ChPT) is an effective field theoretic description of the nuclear force which contains the underlying symmetries of the force but deals with nucleons and pions rather than quarks and gluons. It has the advantage of being applicable at low energies but requires tuning some parameters to experimental data. Once these parameters have been determined ChPT predicts how the reaction should behave as a function of the kinematic variable. When applied to the reaction, p([gamma], [pi]0)p, near threshold it explained the discrepancy with the LETs and made predictions for electroproduction, p(e, e'p)[pi] 0. Electroproduction measurements at Mainz in the 1990's showed a clear discrepancy with these predictions of ChPT; with parameters determined from one set of kinematics the data for a second set lay far from the predicted value. However, recently completed measurements at Mainz disagreed with their previous measurements. In the experiment presented here, measurements of neutral pion electroproduction, p(e, e'p)[pi]0, were made in bins of momentum transfer, Q2, between Q2 = 0.05 [GeV/c]2 and Q2 = 0.15 [GeV/c]0 and of center-of-mass energy, W, between 0 d"W d"30 MeV (above threshold). The experiment was performed in Hall A at the Jefferson Laboratory. Scattered electrons were detected in one of the two High Resolution Spectrometers while the recoiling protons were detected in the BigBite spectrometer. The results of the present experiment agree within uncertainties with the recent Mainz measurements and extend in W significantly beyond those measurements. The present data show significant disagreement with some terms in the cross section above Q2 ~ 0.10 [GeV/c]2. For W e"5 MeV the disagreement is very strong and consistent. Whether fitting new ChPT parameters to the recent data or adding more terms to the calculations would improve the agreement remains to be seen.
Book Synopsis Deep Inelastic Pi-zero Electroproduction at Q from 2 to 8.5 (GeV/c) by : Thomas Patrick McPharlin
Download or read book Deep Inelastic Pi-zero Electroproduction at Q from 2 to 8.5 (GeV/c) written by Thomas Patrick McPharlin and published by . This book was released on 1977 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electron Beam Asymmetry Measurements from Exclusive Pi0 Electroproduction in the Delta(1232) Resonance Region by : K. Joo
Download or read book Electron Beam Asymmetry Measurements from Exclusive Pi0 Electroproduction in the Delta(1232) Resonance Region written by K. Joo and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The polarized longitudinal-transverse structure function sigma_LT'in the p(e, e'p)pi^0 reaction has been measured for the first time in the Delta(1232) resonance region for invariant mass W = 1.1 - 1.3 GeV and at four-momentum transfer Q^2 = 0.40 and 0.65 GeV^2. Data were taken at the Thomas Jefferson National Accelerator Facility with the CEBAF Large Acceptance Spectrometer (CLAS) using longitudinally polarized electrons at an energy of 1.515 GeV. This newly measured sigma_LT' provides new and unique information on the interference between resonant and non-resonant amplitudes in the Delta(1232) resonance region. The comparison to recent phenomenological calculations shows sensitivity to the description of non-resonant amplitudes and higher resonances.
Book Synopsis Hadron Spectroscopy And Structure - Proceedings Of The Xviii International Conference by : Feng-kun Guo
Download or read book Hadron Spectroscopy And Structure - Proceedings Of The Xviii International Conference written by Feng-kun Guo and published by World Scientific. This book was released on 2020-07-28 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the conference proceedings for the 18th International Conference on Hadron Spectroscopy and Structure (HADRON2019), held in Guilin, China. It is among the most important conference series in the field of hadron spectroscopy and structure. Collecting more than 130 contributions from this conference, the book spans over the topics of meson and baryon spectroscopy, exotic hadrons, hadron production and interactions, analysis tools, QCD and hadron structure, hadrons in nuclear environment and hypernuclei. Summaries of the recent discoveries from Belle, BESIII, LHCb and other high-energy experiments, as well as recent theoretical developments in the above mentioned topics, are contained in this volume, rendering it as a valuable resource for researchers working on hadron spectroscopy and structure.
Download or read book Lectures on QCD written by Frieder Lenz and published by Springer. This book was released on 1997-10-15 with total page 763 pages. Available in PDF, EPUB and Kindle. Book excerpt: The two-volume set Lectures on QCD provides an introductory overview of Quantum Chromodynamics, the theory of strong interactions. In a series of pedagogically written articles based on lectures given over the years to graduate students, the fundamentals of QCD are discussed and significant application areas are described. The field-theoretic basis of QCD is the focus of the first volume, while the application of QCD to the phenomenology of strong interactions forms the subject of the second volume.
Book Synopsis Shape of Hadrons by : Costas N. Papanicolas
Download or read book Shape of Hadrons written by Costas N. Papanicolas and published by American Inst. of Physics. This book was released on 2007-04-30 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: The workshop addressed the issue of the shape of hadrons by reviewing all relevant information both theoretical and experimental. The focus was on photo- and electro-excitation experiments on the nucleon, and on lattice and effective field theory, nucleon models, and phenomenological calculations.
Book Synopsis Intersections of Particle and Nuclear Physics by : Tony M. Liss
Download or read book Intersections of Particle and Nuclear Physics written by Tony M. Liss and published by American Institute of Physics. This book was released on 2006-12-13 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a conference that explores areas of common interest between nuclear physicists, high energy (particle) physicists, and astrophysicists. These areas range from studies of the strong interactions that bind the nuclei together, to physics of the very early Universe. They include such topics as the detailed behavior of neutrinos and searches for "new physics", that is phenomena that cannot be accounted for by our current theories.
Book Synopsis From the PS to the LHC - 50 Years of Nobel Memories in High-Energy Physics by : Luis Alvarez-Gaumé
Download or read book From the PS to the LHC - 50 Years of Nobel Memories in High-Energy Physics written by Luis Alvarez-Gaumé and published by Springer. This book was released on 2013-04-05 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection of lectures and essays by eminent researchers in the field, many of them nobel laureates, is an outgrow of a special event held at CERN in late 2009, coinciding with the start of LHC operations. Careful transcriptions of the lectures have been worked out, subsequently validated and edited by the lecturers themselves. This unique insight into the history of the field includes also some perspectives on modern developments and will benefit everyone working in the field, as well as historians of science.
Download or read book High Energy Physics Index written by and published by . This book was released on 1992 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pion-Electroproduction by : Edoardo Amaldi
Download or read book Pion-Electroproduction written by Edoardo Amaldi and published by Springer. This book was released on 2006-04-11 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Pion-Nucleon System by : B. H. Bransden
Download or read book The Pion-Nucleon System written by B. H. Bransden and published by . This book was released on 2015-02-16 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthesizing the theoretical and experimental advances in pion-nucleon interactions over approximately the last twelve years, the authors offer here a timely account of the hadronic interactions of pions and nucleons and of the structure of nucleons. Because of the hadronic SU3 symmetry, the book also treats the structure of baryons in general, and so contains much material external to the specific field of pion-nucleon interactions. Thus the book's subject can be stated as the hadronic structure of baryons as illustrated particularly by pion-nucleon interaction. Following an introductory discussion of isotopic spin, the authors proceed to chapters that treat low energy pion scattering by nucleons and the photoproduction of pions; forward and fixed momentum transfer dispersion relations; analytic properties of scattering amplitudes; formation of nucleon resonances; symmetries and classification of particles and resonances; current algebra, sum rules, and superconvergence relations; scattering at higher energies; pion-nucleon dynamics; pion-nucleon inelastic scattering; and the form factors of the nucleon and the pion. Each chapter is followed by abundant references to the original literature. The level of the writing is suitable for students at the graduate level, and the presentation is even and self-contained. On balance, the authors have prepared a useful consolidation and review of this difficult and changing area of investigation. Originally published in 1973. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
Author :Willem Hendrik Dickhoff Publisher :World Scientific Publishing Company ISBN 13 :9813101318 Total Pages :851 pages Book Rating :4.8/5 (131 download)
Book Synopsis Many-body Theory Exposed! Propagator Description Of Quantum Mechanics In Many-body Systems (2nd Edition) by : Willem Hendrik Dickhoff
Download or read book Many-body Theory Exposed! Propagator Description Of Quantum Mechanics In Many-body Systems (2nd Edition) written by Willem Hendrik Dickhoff and published by World Scientific Publishing Company. This book was released on 2008-05-02 with total page 851 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive textbook on the quantum mechanics of identical particles includes a wealth of valuable experimental data, in particular recent results from direct knockout reactions directly related to the single-particle propagator in many-body theory. The comparison with data is incorporated from the start, making the abstract concept of propagators vivid and accessible. Results of numerical calculations using propagators or Green's functions are also presented. The material has been thoroughly tested in the classroom and the introductory chapters provide a seamless connection with a one-year graduate course in quantum mechanics. While the majority of books on many-body theory deal with the subject from the viewpoint of condensed matter physics, this book emphasizes finite systems as well and should be of considerable interest to researchers in nuclear, atomic, and molecular physics. A unified treatment of many different many-body systems is presented using the approach of self-consistent Green's functions. The second edition contains an extensive presentation of finite temperature propagators and covers the technique to extract the self-energy from experimental data as developed in the dispersive optical model.The coverage proceeds systematically from elementary concepts, such as second quantization and mean-field properties, to a more advanced but self-contained presentation of the physics of atoms, molecules, nuclei, nuclear and neutron matter, electron gas, quantum liquids, atomic Bose-Einstein and fermion condensates, and pairing correlations in finite and infinite systems, including finite temperature.
Download or read book Neutrino Mass written by Nicolai Popov and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses topical problems in neutrino physics, in particular the determination of neutrino masses. The neutrino was predicted 90 years ago, and its mass is still unknown. Here we trace the evolution of neutrino mass research and present the current understanding.
Book Synopsis String Theory and the Real World by : Gordon Kane
Download or read book String Theory and the Real World written by Gordon Kane and published by Morgan & Claypool Publishers. This book was released on 2017-03-27 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book attempts to explain why 'string theory' may provide the comprehensive underlying theory that describes and explains our world. It is an enthusiastic view of how compactified string/M-theories (plus data that may be reachable) seem to have the possibilities of leading to a comprehensive underlying theory of particle physics and cosmology, perhaps soon. We are living in a hugely exciting era for science, one during which it may be possible to achieve a real and true understanding of our physical world.
Book Synopsis Structure of Atomic Nuclei by : L. Satpathy
Download or read book Structure of Atomic Nuclei written by L. Satpathy and published by Alpha Science Int'l Ltd.. This book was released on 1999 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is an outcome or a SERC School on the nuclear physics on the theme ?Nuclear Structure?. The topics covered are nuclear many-body theory and effective interaction, collective model and microscopic aspects of nuclear structure with emphasis on details of technique and methodology by a group of working nuclear physicists who have adequate expertise through decades of experience and are generally well known in their respective fieldsThis book will be quite useful to the beginners as well as to the specialists in the field of nuclear structure physics.
Book Synopsis Quantum Electrodynamics by : Walter Greiner
Download or read book Quantum Electrodynamics written by Walter Greiner and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: The need for a second edition of our text on Quantum Electrodynamics has given us the opportunity to implement some corrections and amendments. We have corrected a number of misprints and minor errors and have supplied additional explanatory remarks at various places. Furthermore some new material has been included on the magnetic moment of the muon (in Example 5. 6) and on the Lamb shift (in Example 5. 8). Finally, we have added the new Example 3. 17 which explains the equivalent photon method. We thank several colleagues for helpful comments and also are grateful to Dr. R. Mattiello who has supervised the preparation of the second edition of the book. Furthermore we acknowledge the agreeable collaboration with Dr. H. J. K6lsch and his team at Springer-Verlag, Heidelberg. Frankfurt am Main, Walter Greiner July 1994 Joachim Reinhardt Preface to the First Edition Theoretical physics has become a many-faceted science. For the young student it is difficult enough to cope with the overwhelming amount of new scientific material that has to be learned, let alone obtain an overview of the entire field, which ranges from mechanics through electrodynamics, quantum mechanics, field theory, nuclear and heavy-ion science, statistical mechanics, thermodynamics, and solid state theory to elementary-particle physics. And this knowledge should be acquired in just 8-10 semesters, during which, in addition, a Diploma or Master's thesis has to be worked on or examinations prepared for.
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