Transition nucleon resonance electrocouplings from CLAS data on pi+pi-p electroproduction off protons.

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Electrocouplings of excited proton states with masses less than 1.8 GeV were determined for the first time from the CLAS data on {pi}{sup +}{pi}{sup -}p electroproduction at photon virtualities Q{sup 2} < 1.5 GeV {sup 2}. Electrocouplings were obtained from a combined fit of all available observables within the framework of a phenomenological reaction model. Accurate information on the Q{sup 2}-evolution of {gamma}{sub virt}NN* electrocouplings for many excited proton states with masses less than 1.8 GeV and at photon virtualities up to 1.5 GeV{sup 2} have become available from CLAS data on {pi}{sup +}{pi}{sup -}p electroproduction. These results open up ... continued below

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349-352

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Mokeev, Victor October 1, 2011.

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Electrocouplings of excited proton states with masses less than 1.8 GeV were determined for the first time from the CLAS data on {pi}{sup +}{pi}{sup -}p electroproduction at photon virtualities Q{sup 2} < 1.5 GeV {sup 2}. Electrocouplings were obtained from a combined fit of all available observables within the framework of a phenomenological reaction model. Accurate information on the Q{sup 2}-evolution of {gamma}{sub virt}NN* electrocouplings for many excited proton states with masses less than 1.8 GeV and at photon virtualities up to 1.5 GeV{sup 2} have become available from CLAS data on {pi}{sup +}{pi}{sup -}p electroproduction. These results open up new opportunities for theory to explore confinement mechanisms in the baryon sector through their manifestation in the structure of excited proton states of various quantum numbers, as it was outlined. The analysis reported here covers the range of photon virtualities, where both meson-baryon and quark degrees of freedom can be relevant. Our results on high lying N* electrocouplings for the first time make it possible to explore the transition from meson-baryon to quark degrees of freedom in the structure of excited proton states with masses above 1.6 GeV within the framework of dynamical coupled channel approaches under development in EBAC at Jefferson Lab.

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349-352

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  • Journal Name: AIP Conf.Proc.; Journal Volume: 1374; Conference: MENU 2010, May 31-June 4, 2010, Williamsburg, VA

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  • Report No.: JLAB-PHY-10-1257
  • Report No.: DOE/OR/23177-1327
  • Report No.: arXiv:1010.0712
  • Grant Number: AC05-06OR23177
  • DOI: 10.1063/1.3647157 | External Link
  • Office of Scientific & Technical Information Report Number: 1029535
  • Archival Resource Key: ark:/67531/metadc832986

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • October 1, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 3, 2016, 6:07 p.m.

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Mokeev, Victor. Transition nucleon resonance electrocouplings from CLAS data on pi+pi-p electroproduction off protons., article, October 1, 2011; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc832986/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.