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Title: Proton elastic form factor ratios to Q{sup 2} = 3.5 GeV{sup 2} by polarization transfer

Abstract

The ratio of the proton elastic electromagnetic form factors, G{sub E{sub p}}/G{sub M{sub p}}, was obtained by measuring P{sub t} and P{sub {ell}}, the transverse and longitudinal recoil proton polarization components, respectively, for the elastic {rvec e}p {yields} e{rvec p} reaction in the four-momentum transfer squared range of 0.5 to 3.5 GeV{sup 2}. In the single-photon exchange approximation, the ratio G{sub E{sub p}}/G{sub M{sub p}} is directly proportional to the ratio P{sub t}/P{sub {ell}}. The simultaneous measurement of P{sub t} and P{sub {ell}} in a polarimeter reduces systematic uncertainties. The results for the ratio G{sub E{sub p}}/G{sub M{sub p}} show a systematic decrease with increasing Q{sup 2}, indicating for the first time a definite difference in the distribution of charge and magnetization in the proton. The data have been re-analyzed and systematic uncertainties have become significantly smaller than previously published results.

Authors:
; ;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
Sponsoring Org.:
USDOE; USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
837157
Report Number(s):
JLAB-PHY-05-292; DOE/ER/40150-3180; nucl-ex/0501018
TRN: US0500926
DOE Contract Number:  
AC05-84ER40150
Resource Type:
Journal Article
Resource Relation:
Other Information: No journal information given for this preprint; PBD: 1 Jan 2005
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; DISTRIBUTION; ELECTROMAGNETIC FORM FACTORS; FORM FACTORS; MAGNETIZATION; POLARIMETERS; POLARIZATION; PROTONS

Citation Formats

V. Punjabi, C.F. Perdrisat, and et al. Proton elastic form factor ratios to Q{sup 2} = 3.5 GeV{sup 2} by polarization transfer. United States: N. p., 2005. Web.
V. Punjabi, C.F. Perdrisat, & et al. Proton elastic form factor ratios to Q{sup 2} = 3.5 GeV{sup 2} by polarization transfer. United States.
V. Punjabi, C.F. Perdrisat, and et al. Sat . "Proton elastic form factor ratios to Q{sup 2} = 3.5 GeV{sup 2} by polarization transfer". United States. https://www.osti.gov/servlets/purl/837157.
@article{osti_837157,
title = {Proton elastic form factor ratios to Q{sup 2} = 3.5 GeV{sup 2} by polarization transfer},
author = {V. Punjabi and C.F. Perdrisat and et al},
abstractNote = {The ratio of the proton elastic electromagnetic form factors, G{sub E{sub p}}/G{sub M{sub p}}, was obtained by measuring P{sub t} and P{sub {ell}}, the transverse and longitudinal recoil proton polarization components, respectively, for the elastic {rvec e}p {yields} e{rvec p} reaction in the four-momentum transfer squared range of 0.5 to 3.5 GeV{sup 2}. In the single-photon exchange approximation, the ratio G{sub E{sub p}}/G{sub M{sub p}} is directly proportional to the ratio P{sub t}/P{sub {ell}}. The simultaneous measurement of P{sub t} and P{sub {ell}} in a polarimeter reduces systematic uncertainties. The results for the ratio G{sub E{sub p}}/G{sub M{sub p}} show a systematic decrease with increasing Q{sup 2}, indicating for the first time a definite difference in the distribution of charge and magnetization in the proton. The data have been re-analyzed and systematic uncertainties have become significantly smaller than previously published results.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {1}
}