Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

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 orcid (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.
Please use this url to cite or link to this publication:
author
and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
93
article number
122001
publisher
American Physical Society
external identifiers
  • scopus:80051550976
  • pmid:15447252
ISSN
1079-7114
DOI
10.1103/PhysRevLett.93.122001
project
Elastic and Virtual Compton Scattering and Nucleon Polarizabilities
language
English
LU publication?
yes
id
914093d8-ba9a-4c71-b8e9-d7165b498064 (old id 713576)
date added to LUP
2016-04-04 10:59:52
date last changed
2022-02-21 04:01:10
@article{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    = {{American Physical Society}},
  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}},
  doi          = {{10.1103/PhysRevLett.93.122001}},
  volume       = {{93}},
  year         = {{2004}},
}