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GEp/GMp Ratio by Polarization Transfer in \vec{e}p→e\vec{p}

Jones, M. K. ; Fissum, Kevin LU orcid and Zhou, Z. L. (2000) In Physical Review Letters 84(7). p.1398-1402
Abstract
The ratio of the proton's elastic electromagnetic form factors, GEp/GMp, was obtained by measuring Pt and Pℓ, the transverse and the longitudinal recoil proton polarization, respectively. For elastic →ep→e→p, GEp/GMp is proportional to Pt/Pℓ. Simultaneous measurement of Pt and Pℓ in a polarimeter provides good control of the systematic uncertainty. The results for the ratio GEp/GMp show a systematic decrease as Q2 increases from 0.5 to 3.5GeV2, indicating for the first time a definite difference in the spatial distribution of charge and magnetization currents in the proton.
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author
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publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
84
issue
7
pages
1398 - 1402
publisher
American Physical Society
external identifiers
  • scopus:18744436199
ISSN
1079-7114
DOI
10.1103/PhysRevLett.84.1398
project
Investigations of and with Polarized Electromagnetic Beams
language
English
LU publication?
yes
id
8530246a-ceba-412e-bed1-6efe457c896a
date added to LUP
2019-06-25 11:02:35
date last changed
2022-04-26 02:22:44
@article{8530246a-ceba-412e-bed1-6efe457c896a,
  abstract     = {{The ratio of the proton's elastic electromagnetic form factors, GEp/GMp, was obtained by measuring Pt and Pℓ, the transverse and the longitudinal recoil proton polarization, respectively. For elastic →ep→e→p, GEp/GMp is proportional to Pt/Pℓ. Simultaneous measurement of Pt and Pℓ in a polarimeter provides good control of the systematic uncertainty. The results for the ratio GEp/GMp show a systematic decrease as Q2 increases from 0.5 to 3.5GeV2, indicating for the first time a definite difference in the spatial distribution of charge and magnetization currents in the proton.}},
  author       = {{Jones, M. K. and Fissum, Kevin and Zhou, Z. L.}},
  issn         = {{1079-7114}},
  language     = {{eng}},
  number       = {{7}},
  pages        = {{1398--1402}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{GEp/GMp Ratio by Polarization Transfer in \vec{e}p→e\vec{p}}},
  url          = {{http://dx.doi.org/10.1103/PhysRevLett.84.1398}},
  doi          = {{10.1103/PhysRevLett.84.1398}},
  volume       = {{84}},
  year         = {{2000}},
}