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@ARTICLE{Morsch:50428,
      author       = {Morsch, H. P. and Zupranski, P.},
      title        = {{S}tructure of the breathing mode of the nucleon from
                      high-energy p-p scattering},
      journal      = {Physical review / C},
      volume       = {71},
      number       = {6},
      issn         = {0556-2813},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {PreJuSER-50428},
      pages        = {065203},
      year         = {2005},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Spectra of p-p and pi-p scattering at beam momenta between
                      6 and 30 GeV/c have been reanalyzed. These show strong
                      excitation of N-* resonances, the strongest one
                      corresponding to the "scalar" P-11 excitation (breathing
                      mode) at m(0)=1400 +/- 10 MeV with Gamma=200 +/- 20 MeV. The
                      result of a strong scalar excitation is supported by a large
                      longitudinal amplitude S-1/2 extracted from e-p scattering.
                      From exclusive data on p+p -> pp pi(+)pi(-), a large 2 pi-N
                      decay branch for the P-11 resonance of B-2 pi=75 +/- $20\%$
                      has been extracted.The differential cross sections were
                      described in a double-folding approach, assuming multigluon
                      exchange as the dominant part of the effective interaction
                      between the constituents of projectile and target. First,
                      the parameters of the interaction were fitted to elastic
                      scattering; then, with this interaction, the inelastic cross
                      sections were described in the distorted wave Born
                      approximation (DWBA). A good description of the data
                      requires a surface peaked transition density, quite
                      different from that of a pure radial mode. In contrast, the
                      electron scattering amplitude S-1/2 is quite well described
                      by a breathing mode transition density with radial node.
                      This large difference between charge and matter transition
                      densities suggests that in p-p scattering the coupling to
                      the multigluon field is much more important than the
                      coupling to the valence quarks. A multigluon (or sea-quark)
                      transition density is derived, which also shows breathing,
                      indicating a rather complex multiquark structure of N and
                      N-* including additional multigluon (or q(2n)(q) over bar
                      (2n)) creation out of the ground state vacuum.},
      keywords     = {p p: elastic scattering (INSPIRE) / p p: inelastic
                      scattering (INSPIRE) / nucleon resonance: mass (INSPIRE) /
                      nucleon resonance: width (INSPIRE) / nucleon resonance:
                      hadronic decay (INSPIRE) / nucleon resonance: (1400)
                      (INSPIRE) / mass spectrum: missing-mass (INSPIRE) / mass
                      spectrum: (pi+ pi-) (INSPIRE) / differential cross section:
                      momentum transfer (INSPIRE) / model: Breit-Wigner (INSPIRE)
                      / partial wave analysis (INSPIRE) / distorted wave Born
                      approximation (INSPIRE) / pomeron: exchange (INSPIRE) /
                      numerical calculations: interpretation of experiments
                      (INSPIRE) / p p --> 2p pi+ pi- (INSPIRE) / p p --> 2p
                      anything (INSPIRE) / 6-30 GeV/c (INSPIRE)},
      cin          = {IKP-E-I},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB221},
      pnm          = {Physik der Hadronen},
      pid          = {G:(DE-Juel1)FUEK241},
      shelfmark    = {Physics, Nuclear / 14.20.Gk / 13.75.-n / 13.85.-t /
                      25.40.-h},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000230275800058},
      eprint       = {hep-ex/0405003},
      howpublished = {arXiv:hep-ex/0405003},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:hep-ex/0405003;\%\%$},
      eprint       = {oai:arXiv.org:hep-ex/0405003},
      howpublished = {arXiv:oai:arXiv.org:hep-ex/0405003},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:oai:arXiv.org:hep-ex/0405003;\%\%$},
      doi          = {10.1103/PhysRevC.71.065203},
      url          = {https://juser.fz-juelich.de/record/50428},
}