Measurement of the Generalized Polarizabilities of the Proton in Virtual Compton Scattering at Q2 = 0.92 and 1.76 GeV2
(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:
https://lup.lub.lu.se/record/713576
- author
- Laveissière, G and Fissum, Kevin LU
- organization
- publishing date
- 2004
- 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}}, }