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Measurement Of Polarization Observables In The Electro Excitation Of The Proton To Its First Excited State
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Book Synopsis Measurement of Polarization Observables in the Electro-Excitation of the Proton to Its First Excited State by :
Download or read book Measurement of Polarization Observables in the Electro-Excitation of the Proton to Its First Excited State written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports results from the Thomas Jefferson National Accelerator Facility (Jefferson Lab) Hall A experiment E91-011, which measured double-polarization observables in the pion electroproduction reaction from the proton. Specifically, the experiment measured the recoil proton polarization, polarized response functions, and cross section for the p([rvec e], e[prime][rvec p])[pi][sup o] reaction at a center-of-mass energy centered at W= 1232 MeV--the peak of the Delta(1232) resonance--and at a four-momentum transfer squared of Q[sup 2]= 1.0 GeV[sup 2]/c[sup 2]. Both the recoil proton polarization and polarized response function results will be presented in this thesis. Data were collected at Jefferson Lab, located in Newport News, Virginia during the summer of 2000. A 4.53 GeV polarized electron beam was scattered off of a cryogenic hydrogen target. The recoil proton polarization was measured in the Focal Plane Polarimeter (FPP), located in one of the two High Resolution Spectrometers (HRS) in Hall A.A maximum likelihood method was used to determine the polarized response functions directly from the measured polarizations and cross sections. A simultaneous fit of the cross sections, the recoil proton polarizations, and angular distributions of the polarized response functions will provide a determination of individual multipole amplitudes. Some of these multipole amplitudes are related to the concept of proton deformation. Both the recoil proton polarizations and polarized response functions were compared to two phenomenological models: MAID and SAID, which have all free parameters fixed, based on fits to previous world data. The measured helicity dependent observables, which are dominated by imaginary parts of Delta(1232)-resonance excitation multipole amplitudes, agree very well with the two models. The measured helicity independent observables, which are dominated by real parts of background multipole amplitudes, do not agree completely with either model. These helicity independent observables are being measured accurately for the first time, giving new insight to the deformation of the proton and into reaction mechanisms of pion production.
Book Synopsis Perspectives In Hadronic Physics - Proceedings Of The Second International Conference by : Boffi Sigfrido
Download or read book Perspectives In Hadronic Physics - Proceedings Of The Second International Conference written by Boffi Sigfrido and published by #N/A. This book was released on 1999-12-29 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume discusses theoretical and experimental activities in the investigation of nucleon and nuclear structure by electromagnetic and hadronic probes at intermediate and high energies. The focus is on laboratory activities, recent progress concerning the structure of hadrons, relativistic many-body approaches, deep inelastic scattering and correlations in nuclei.
Book Synopsis Gdh 2000 - The Gerasimov-drell-hearn Sum Rule & The Nucleon Spin Structure In The Resonance Region by : Dieter Drechsel
Download or read book Gdh 2000 - The Gerasimov-drell-hearn Sum Rule & The Nucleon Spin Structure In The Resonance Region written by Dieter Drechsel and published by World Scientific. This book was released on 2001-02-05 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: The history of spin in general, and of the nucleon spin structure in particular, has been full of surprises. For the past 25 years deep inelastic lepton scattering has been studied to determine the carriers of the nucleon spin. However, it was realized only recently that a full understanding of the nucleon spin will also require detailed information on the helicity structure in the resonance region, i.e. in the realm of nonperturbative QCD.This volume gives a status report on the spin structure in the nucleon resonance region, focusing on: new experimental results from SLAC and HERMES; a first glance at the JLab experiments to map out the spin structure functions at low and intermediate four-momentum transfers; the pioneering experiment at MAMI (Mainz) to determine the Gerasimov-Drell-Hearn sum rule for real photons; and recent theoretical concepts and investigations to describe the spin structure in the frameworks of higher twist expansion, phenomenological models and chiral perturbation theory.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 1396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Polarization Observables Is and Ic for [gamma][rho] -] [rho] [pi]+[pi]- Using the CLAS Spectrometer by : Charles Hanretty
Download or read book Measurement of the Polarization Observables Is and Ic for [gamma][rho] -] [rho] [pi]+[pi]- Using the CLAS Spectrometer written by Charles Hanretty and published by . This book was released on 2011 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Presented in this work are the first ever measurements of the polarization observable Is for a final state with two pions and the first ever measurements of Ic for a final state containing charged pions (let alone the first measurements of both observables for the specialized case of [gamma][rho] -> [rho] [pi]+[pi]- reactions). The presented measurements were made using the high-statistics data available in the CLAS g8b data set. This data were taken at the Thomas Jefferson National Accelerator Facility (JLab) from July 20th to September 1st of 2005 using linearly polarized photons, an unpolarized liquid hydrogen (LH2 target), and the CEBAF Large Acceptance Spectrometer (CLAS). The highly-polarized photons were produced via bremsstrahlung using an unpolarized electron beam provided by the Continuous Electron Beam Accelerator Facility (CEBAF) accelerator and a well-oriented diamond radiator. These polarized photons were produced at five different coherent edge energies: 1.3 GeV, 1.5 GeV, 1.7 GeV, 1.9 GeV, and 2.1 GeV. Considering the 200 MeV-wide window of highly polarized photons whose upper limit is the coherent edge energy, and the five different coherent edge energies used, highly polarized photons were produced covering an total energy range of 1 GeV. These data along with the utilized analysis tools have lead to clean, continuous, low-error measurements of Is and Ic which will aide the hadronic physics community in its search for the complete description of one of the most fundamental systems in nature, the baryon.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2006 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975-11 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Many Body Structure of Strongly Interacting Systems by : Hartmuth Arenhövel
Download or read book Many Body Structure of Strongly Interacting Systems written by Hartmuth Arenhövel and published by Springer Science & Business Media. This book was released on 2007-12-03 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: This carefully edited proceedings volume provides an extensive review and analysis of the work carried out over the past 20 years at the Mainz Microtron (MAMI). This research is centered on the application of Quantum Chromodynamics in the strictly nonperturbative regime at hadronic scales of about 1 fm. The book goes further to offer an outlook on the next wave research, with the forthcoming upgrade of MAMI.
Download or read book INIS Atomindex written by and published by . This book was released on 1995 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electron and Proton Kinetics and Dynamics in Flaring Atmospheres by : Valentina Zharkova
Download or read book Electron and Proton Kinetics and Dynamics in Flaring Atmospheres written by Valentina Zharkova and published by John Wiley & Sons. This book was released on 2012-06-25 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: This timely book presents new research results on high-energy particle physics related to solar flares, covering the theory and applications of the reconnection process in a clear and comprehensible way. It investigates particle kinetics and dynamics in flaring atmospheres and their diagnostics from spectral observations, while providing an analysis of the observation data and techniques and comparing various models. Written by an internationally acclaimed expert, this is vital reading for all solar, astro-, and plasma physicists working in the field.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 1684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Physics written by and published by . This book was released on 2009 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Polarization of 7-8 Mev Protons Inelastically Scattered from the First Excited State of Ni58 and Ti by : Emery E. Griffin
Download or read book Measurement of the Polarization of 7-8 Mev Protons Inelastically Scattered from the First Excited State of Ni58 and Ti written by Emery E. Griffin and published by . This book was released on 1962 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nuclear Many-body and Medium Effects in Nuclear Interactions and Reactions by : Kichiji Hatanaka
Download or read book Nuclear Many-body and Medium Effects in Nuclear Interactions and Reactions written by Kichiji Hatanaka and published by World Scientific. This book was released on 2003 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of the third meeting in the series of symposia and workshops on nuclear medium effects. The topics covered include many-body forces in few-nucleon systems, nuclear interactions in the medium, medium effects in nuclear reactions, properties of the nuclear medium, and related topics, with special emphasis on work related to experimental data with intermediate-energy light-ion projectiles. Readership: Graduate students and researchers in nuclear physics.
Download or read book OAR written by and published by . This book was released on 1967 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Air Force Research Resumés written by and published by . This book was released on with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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