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Measurement of the Generalized Polarizabilities of the Proton in Virtual Compton Scattering at Q2 = 0.92 and 1.76 GeV2

Laveissière, G and Fissum, Kevin LU (2004) In Physical Review Letters 93.
Abstract
We report a virtual Compton scattering study of the proton at low c.m. energies. We have determined the structure functions PLL–PTT/and PLT, and the electric and magnetic generalized polarizabilities (GPs) E(Q2) and M(Q2) at momentum transfer Q2=0.92 and 1.76 GeV2. The electric GP shows a strong falloff with Q2, and its global behavior does not follow a simple dipole form. The magnetic GP shows a rise and then a falloff; this can be interpreted as the dominance of a long-distance diamagnetic pion cloud at low Q2, compensated at higher Q2 by a paramagnetic contribution from N intermediate states.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
93
publisher
American Physical Society
external identifiers
  • Scopus:80051550976
ISSN
1079-7114
DOI
10.1103/PhysRevLett.93.122001
language
English
LU publication?
yes
id
914093d8-ba9a-4c71-b8e9-d7165b498064 (old id 713576)
date added to LUP
2007-12-11 13:16:14
date last changed
2016-10-13 04:43:19
@misc{914093d8-ba9a-4c71-b8e9-d7165b498064,
  abstract     = {We report a virtual Compton scattering study of the proton at low c.m. energies. We have determined the structure functions PLL–PTT/and PLT, and the electric and magnetic generalized polarizabilities (GPs) E(Q2) and M(Q2) at momentum transfer Q2=0.92 and 1.76 GeV2. The electric GP shows a strong falloff with Q2, and its global behavior does not follow a simple dipole form. The magnetic GP shows a rise and then a falloff; this can be interpreted as the dominance of a long-distance diamagnetic pion cloud at low Q2, compensated at higher Q2 by a paramagnetic contribution from N intermediate states.},
  author       = {Laveissière, G and Fissum, Kevin},
  issn         = {1079-7114},
  language     = {eng},
  publisher    = {ARRAY(0x9b0e220)},
  series       = {Physical Review Letters},
  title        = {Measurement of the Generalized Polarizabilities of the Proton in Virtual Compton Scattering at Q<sup>2</sup> = 0.92 and 1.76 GeV<sup>2</sup>},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.93.122001},
  volume       = {93},
  year         = {2004},
}