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Title: Measurements of the proton elastic-form-factor ratio {mu}{sup p}G{sup p}{sub E}/G{sup p}{sub M} at low momentum transfer.

Abstract

High-precision measurements of the proton elastic form-factor ratio, {mu}{sub p}G{sup p}E/G{sup p}M, have been made at four-momentum transfer, Q{sup 2}, values between 0.2 and 0.5 GeV{sup 2}. The new data, while consistent with previous results, clearly show a ratio less than unity and significant differences from the central values of several recent phenomenological fits. By combining the new form-factor ratio data with an existing cross-section measurement, one finds that in this Q{sup 2} range the deviation from unity is primarily due to G{sup p}E being smaller than expected.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF); Israel Science Foundation; Korea Research Foundation; US-Israeli Bi-National Science Foundation
OSTI Identifier:
958533
Report Number(s):
ANL/PHY/JA-59493
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US1000207
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys. Rev. Lett.; Journal Volume: 99; Journal Issue: 2007
Country of Publication:
United States
Language:
ENGLISH
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; MOMENTUM TRANSFER; PROTONS; PHYSICS

Citation Formats

Ron, G., Glister, J., Lee, B., Allada, K., Armstrong, W., Arrington, J., Physics, Tel Aviv Univ., St. Mary's Univ., Dalhousie Univ., Seoul National Univ., Univ. of Kentucky, Temple Univ., and The Jefferson Lab Hall A Collaboration. Measurements of the proton elastic-form-factor ratio {mu}{sup p}G{sup p}{sub E}/G{sup p}{sub M} at low momentum transfer.. United States: N. p., 2007. Web. doi:10.1103/PhysRevLett.99.202002.
Ron, G., Glister, J., Lee, B., Allada, K., Armstrong, W., Arrington, J., Physics, Tel Aviv Univ., St. Mary's Univ., Dalhousie Univ., Seoul National Univ., Univ. of Kentucky, Temple Univ., & The Jefferson Lab Hall A Collaboration. Measurements of the proton elastic-form-factor ratio {mu}{sup p}G{sup p}{sub E}/G{sup p}{sub M} at low momentum transfer.. United States. doi:10.1103/PhysRevLett.99.202002.
Ron, G., Glister, J., Lee, B., Allada, K., Armstrong, W., Arrington, J., Physics, Tel Aviv Univ., St. Mary's Univ., Dalhousie Univ., Seoul National Univ., Univ. of Kentucky, Temple Univ., and The Jefferson Lab Hall A Collaboration. Mon . "Measurements of the proton elastic-form-factor ratio {mu}{sup p}G{sup p}{sub E}/G{sup p}{sub M} at low momentum transfer.". United States. doi:10.1103/PhysRevLett.99.202002.
@article{osti_958533,
title = {Measurements of the proton elastic-form-factor ratio {mu}{sup p}G{sup p}{sub E}/G{sup p}{sub M} at low momentum transfer.},
author = {Ron, G. and Glister, J. and Lee, B. and Allada, K. and Armstrong, W. and Arrington, J. and Physics and Tel Aviv Univ. and St. Mary's Univ. and Dalhousie Univ. and Seoul National Univ. and Univ. of Kentucky and Temple Univ. and The Jefferson Lab Hall A Collaboration},
abstractNote = {High-precision measurements of the proton elastic form-factor ratio, {mu}{sub p}G{sup p}E/G{sup p}M, have been made at four-momentum transfer, Q{sup 2}, values between 0.2 and 0.5 GeV{sup 2}. The new data, while consistent with previous results, clearly show a ratio less than unity and significant differences from the central values of several recent phenomenological fits. By combining the new form-factor ratio data with an existing cross-section measurement, one finds that in this Q{sup 2} range the deviation from unity is primarily due to G{sup p}E being smaller than expected.},
doi = {10.1103/PhysRevLett.99.202002},
journal = {Phys. Rev. Lett.},
number = 2007,
volume = 99,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}