Electro- and Photo-production of W(783) Mesons Using CLAS at Jefferson Lab PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages : 4
Book Description
Electro- and photoproduction of w(783) from a proton target have been measured in the CLAS detector at the Thomas Jefferson National Accelerator Facility in Newport News VA. The photoproduction data were taken over a photon energy range from 0.5 to 2.3 GeV, while the electroproduction data was obtained over a W range of 1.8-2.5 GeV/c2. Preliminary acceptance corrected center-of-mass angular distributions have been examined for both data sets.
Author: Publisher: ISBN: Category : Languages : en Pages : 4
Book Description
Electro- and photoproduction of w(783) from a proton target have been measured in the CLAS detector at the Thomas Jefferson National Accelerator Facility in Newport News VA. The photoproduction data were taken over a photon energy range from 0.5 to 2.3 GeV, while the electroproduction data was obtained over a W range of 1.8-2.5 GeV/c2. Preliminary acceptance corrected center-of-mass angular distributions have been examined for both data sets.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
Electro- and photoproduction of w(783) from a proton target have been measured in the CLAS detector at the Thomas Jefferson National Accelerator Facility in Newport News VA. The photoproduction data were taken over a photon energy range from 0.5 to 2.3 GeV, while the electroproduction data was obtained over a W range of 1.8-2.5 GeV/c2. Preliminary acceptance corrected center-of-mass angular distributions have been examined for both data sets.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The total and differential cross section for exclusive electro- and photoproduction of vector mesons in the resonance region and above (1.6
Author: Publisher: ISBN: Category : Languages : en Pages : 320
Book Description
The focus of this analysis is photoproduced ? and ?' mesons. The data were obtained in Hall B at Jefferson Lab using a photon beam at an endpoint energy of 4.016 GeV in the spring and summer of 2004. The Hall B photon tagging system and the CLAS spectrometer were used to collect the data. From this data, and in the course of analysis of the N? and N?' systems, measurements were made of the differential cross sections for ? and ?' photoproduction. The differential cross section measurements for the ? improve the statistics and slightly improve the kinematic range for world data. The results for the ?' represents an almost entirely new dataset which will allow for further analysis of the ?' meson. The results of this measurement for the ?' extend the statistics and kinematic range of world data dramatically.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The focus of this analysis is photoproduced n and n' mesons. The data were obtained in Hall B at Jefferson Lab using a photon beam at an endpoint energy of 4.016 GeV in the spring and summer of 2004. The Hall B photon tagging system and the CLAS spectrometer were used to collect the data. From this data, and in the course of analysis of the Nn and Nn' systems, measurements were made of the differential cross sections for n and n' photoproduction. The differential cross section measurements for the n improve the statistics and slightly improve the kinematic range for world data. The results for the n' represents an almost entirely new dataset which will allow for further analysis of the n' meson. The results of this measurement for the n' extend the statistics and kinematic range of world data dramatically.
Author: S. Strauch Publisher: ISBN: Category : Languages : en Pages :
Book Description
Electromagnetic meson production is an important tool in the investigation of the structure of the nucleon. Consequently, a series of meson photo- and electroproduction experiments have been performed with the CLAS detector at Jefferson Lab. In this overview I will report on measurements of cross sections, as well as recent and upcoming measurements of single- and double-polarization observables in meson photoproduction. The data will greatly constrain partial-wave analyses and reduce model-dependent uncertainties in the extraction of nucleon resonance properties.
Author: V. Burkert Publisher: World Scientific ISBN: 9789810244996 Category : Science Languages : en Pages : 458
Book Description
The conference NSTAR 2000 was part of a series of conferences and workshops that began in New York in 1988. Since then, the field of excited nucleons and hadron structure has developed enormously, and the scope has broadened. Most significantly, new experimental facilities have come into operation, allowing precise measurements of resonance couplings and transition form factors. The search for ?missing? quark model states and gluonic excitations in complex hadronic channels is now possible.On the theory side, new and promising developments have emerged: quark models with meson degrees of freedom, hybrid baryon models, and studies of baryons in the limit of many colors. For the first time, lattice QCD has been employed to calculate masses of excited nucleons. Nucleon resonances are now recognized as providing significant contributions to the nucleon spin sum rules, as well as the Gerasimov-Drell-Hearn and Bjorken integrals, at finite momentum transfer.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
This is a brief and selective discussion of meson photoproduction measurements with the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. Meson photo- production is being used as a tool for various investigations, including the spectroscopy of baryons and mesons and the search for vector-meson medium modifications.
Author: Publisher: ISBN: Category : Languages : en Pages : 67
Book Description
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.
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Author: Alan Clayton Coleman
Author: S. Strauch
Author: V. Burkert
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