Polarization Measurements In Photoproduction With Cebaf Large Acceptance Spectrometer PDF Download
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Download Polarization Measurements in Photoproduction with CEBAF Large Acceptance Spectrometer Book in PDF, ePub and Kindle
A significant part of the experimental program in Hall-B of the Jefferson Lab is dedicated to the studies of the structure of baryons. CEBAF Large Acceptance Spectrometer (CLAS), availability of circularly and linearly polarized photon beams and recent addition of polarized targets provides remarkable opportunity for single, double and in some cases triple polarization measurements in photoproduction. An overview of the experiments will be presented.
Author | : Charles Hanretty |
Publisher | : |
Total Pages | : 146 |
Release | : 2011 |
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Download Measurement of the Polarization Observables Is and Ic for [gamma][rho] -] [rho] [pi]+[pi]- Using the CLAS Spectrometer Book in PDF, ePub and Kindle
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.
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Release | : 2009 |
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Download CLAS+FROST Book in PDF, ePub and Kindle
A large part of the experimental program in Hall B of the Jefferson Lab is dedicated to baryon spectroscopy. Photoproduction experiments are essential part of this program. CEBAF Large Acceptance Spectrometer (CLAS) and availability of circularly and linearly polarized tagged photon beams provide unique conditions for this type of experiments. Recent addition of the Frozen Spin Target (FROST) gives a remarkable opportunity to measure double and triple polarization observables for different pseudo-scalar meson photoproduction processes. For the first time, a complete or nearly complete experiment becomes possible and will allow model independent extraction of the reaction amplitude. An overview of the experiment and its current status is presented.
Author | : Volker Burkert |
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Release | : 1990 |
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Download Polarized Target Experiments Using the CEBAF Large Acceptance Spectrometer Book in PDF, ePub and Kindle
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Release | : 2016 |
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Download Baryon Spectroscopy with Polarization Observables from CLAS. Book in PDF, ePub and Kindle
The spectrum of nucleon excitations is dominated by broad and overlapping resonances. Polarization observables in photoproduction reactions are key in the study of these excitations. They give indispensable constraints to partial-wave analyses and help clarify the spectrum. A series of polarized photoproduction experiments have been performed at the Thomas Jefferson National Accelerator Facility with the CEBAF Large Acceptance Spectrometer (CLAS). These measurements include data with linearly and circularly polarized tagged-photon beams, longitudinally and transversely polarized proton and deuterium targets, and recoil polarizations through the observation of the weak decay of hyperons. An overview of these studies and recent results will be given.
Author | : Daniel Carman |
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Release | : 2003 |
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Download Recent Results in Strangeness Photoproduction and Electroproduction Book in PDF, ePub and Kindle
An extensive program of strange particle production off the proton is currently underway with the CEBAF Large Acceptance Spectrometer (CLAS) in Hall B at Jefferson Laboratory. Precision measurements of ground-state Lambda and Sigma^0 hyperons are being carried out with electron and real photon beams, both of which are available with high polarization at energies up to 6 GeV. This talk will focus on selected recent results from the Hall B strangeness program.
Author | : Kenneth H Hicks |
Publisher | : World Scientific |
Total Pages | : 142 |
Release | : 2001-02-28 |
Genre | : Science |
ISBN | : 9814542687 |
Download Strange Quarks In Hadrons, Nuclei And Nuclear Matter - Proceedings Of The International Workshop Book in PDF, ePub and Kindle
This proceedings volume brings together the contributions of experts from different fields within the nuclear physics community. Topics such as rare kaon decays, astrophysics, relativistic heavy ion collisions, and few-GeV electromagnetic probes are covered. The strange quark plays a vital role in understanding such diverse phenomena as CP violation (article by Lincoln Wolfenstein), the “spin crisis” (article by Brad Filipone), and supernova explosions (article by Chris Fryer). Additional topics of interest are parity violation experiments, strangeness content of the proton, and enhanced strangeness production at CERN and RHIC. This unique blend of recent results, with a focus on the role of the strange quark, shows the prominence of strangeness in nuclear physics over the past 50 years.
Author | : E. Klempt |
Publisher | : Elsevier |
Total Pages | : 457 |
Release | : 2016-06-03 |
Genre | : Science |
ISBN | : 1483278026 |
Download The Hadron Mass Spectrum Book in PDF, ePub and Kindle
The Hadron Mass Spectrum covers the proceedings of the Rheinfels Workshop on the Hadron Mass Spectrum, held in St. Goar, Germany on September 3-6, 1990. The book focuses on the processes, methodologies, and reactions involved in hadron spectroscopy. The selection first offers information on strange meson and strangeonium spectroscopy and strangeonium production from LASS. The book also takes a look at the status of strange meson spectroscopy, including status of the spectroscopy, systematics of the level structure, and contributions from LASS. The publication examines the scalar meson enigma and two photon couplings of scalar and tensor mesons. The manuscript also touches on rhoprimes, omegaprimes, and glueballs; meson production mechanisms and selection criteria for cryptoexotic states; and light meson spectroscopy and threshold effects. The selection is a dependable reference for readers interested in hadron mass spectrum.
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Total Pages | : 67 |
Release | : 2014 |
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Download Status of Meson Photoproduction Experiments with CLAS. Book in PDF, ePub and Kindle
A large part of the experimental program in Hall B of the Jefferson Lab is dedicated to baryon spectroscopy. Meson photoproduction experiments are essential part of this program. CEBAF Large Acceptance Spectrometer (CLAS) and availability of circularly and linearly polarized tagged photon beams in combination with longitudinally and transversely polarized frozen spin targets provide unique conditions for this type of experiments. For the first time, a complete or nearly complete measurement became possible and will allow model independent extraction of the reaction amplitude. The measurements were complete with both proton and deuteron targets. An overview of the collected experimental data will be presented.
Author | : Sigfrido Boffi |
Publisher | : Springer Science & Business Media |
Total Pages | : 314 |
Release | : 2004-08-20 |
Genre | : Science |
ISBN | : 9783540210641 |
Download Perspectives in Hadronic Physics Book in PDF, ePub and Kindle
This volume contains the invited and contributed papers presented at the Fourth International Conference on Perspectives in Hadronic Physics and sent to the Editors within the deadline. The Conference was held at the Abdus Salam International Centre for Theoretical Physics (ICTP), Trieste, Italy, from May 12th to 16th, 2003, and was attended by about 100 scientists from 20 countries. The series ofConferences on Perspectives on Hadronic Physics takes place every two years since 1997 and follows the seven Workshops on Perspectives in Nuclear Physics at Intermediate Energies, organized every two years at ICTP since 1983. The aim of these Conferences is to discuss the status-of-the-art concerning the experimental and theoretical investigations of hadronic systems, from nucleons to nuclei and dense nuclear matter, in terms of the relevant underlying degrees of freedom. For such a reason the Fourth Conference has been focused on those experimental and theoretical topics which have been in the last few years the object of intensive investigations, viz. the various approaches employed to describe the structure of hadrons in terms of QCD and QCD inspired models, the recent developments in the treatment of the properties and propagations of hadronic states in the medium, the relevant progress done in the solution of the few- and many- hadron problems, the recent results in the experimental investigation of dense hadronic matter and, last but not least, the physics programs of existing Laboratories and the suggested projects for new Facilities.