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

Jones, M. K. ; Fissum, Kevin LU 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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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
2020-12-29 04:36:35
@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},
}