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Charged pion form factor betweenQ2=0.60and2.45 GeV2. II. Determination of, and results for, the pion form factor

Authors :
C. E. Keppel
D. J. Margaziotis
L. M. Qin
S. Vidakovic
John C. Mitchell
B. Zihlmann
T. Eden
V. Tadevosyan
Y. Okayasu
J. Arrington
D. H. Potterveld
J. Roche
Toshinobu Miyoshi
D. van Westrum
B. Mueller
K. A. Aniol
G. Niculescu
E. J. Brash
S. A. Wood
Ketevi Assamagan
K. Vansyoc
P. H. Kim
W. Zhao
D. McKee
H. C. Fenker
W.U. Boeglin
C. S. Armstrong
D. J. Mack
A. Matsumura
Stephen Avery
E. J. Beise
H. E. Jackson
D. Pitz
C. Xu
G. J. Lolos
A. J. Sarty
C. Yan
Andreas Klein
Jin Liu
M. E. Christy
P. E. Reimer
X. Zheng
I. K. Shin
J. Reinhold
E. F. Gibson
W. F. Vulcan
W. Hinton
S. Stepanyan
P. G. Roos
Ronald Gilman
C. C. Chang
R. van der Meer
D. Abbott
D. Gaskell
M. K. Jones
I. Niculescu
C. F. Perdrisat
Brynle Barrett
V. Kovaltchouk
H. Mkrtchyan
V. Tvaskis
A. F. Lung
Lubomir Pentchev
H. Anklin
Oliver Keith Baker
Geoffrey Smith
Pete Markowitz
Rolf Ent
Glen A. Warren
K. Gustafsson
M. Liang
C. Bochna
J. Volmer
G. M. Huber
P. M. King
D. Koltenuk
H. P. Blok
J. A. Dunne
L. G. Tang
V. A. Punjabi
D. G. Meekins
S. Jin
W. Kim
N. S. Chant
H. Breuer
Tanja Horn
R. J. Holt
Source :
Physical Review C. 78
Publication Year :
2008
Publisher :
American Physical Society (APS), 2008.

Abstract

Cross sections for the reaction {sup 1}H(e,e'{Pi}{sup +})n were measured in Hall C at Thomas Jefferson National Accelerator Facility (JLab) using the high-intensity Continuous Electron Beam Accelerator Facility (CEBAF) to determine the charged pion form factor. Data were taken for central four-momentum transfers ranging from Q{sup 2} = 0.60 to 2.45 GeV{sup 2} at an invariant mass of the virtual photon-nucleon system of W = 1.95 and 2.22 GeV. The measured cross sections were separated into the four structure functions {sigma}{sub L},{sigma}{sub T}, {sigma}{sub LT}, and {sigma}{sub TT}. The various parts of the experimental setup and the analysis steps are described in detail, including the calibrations and systematic studies, which were needed to obtain high-precision results. The different types of systematic uncertainties are also discussed. The results for the separated cross sections as a function of the Mandelstam variable t at the different values of Q{sup 2} are presented. Some global features of the data are discussed, and the data are compared with the results of some model calculations for the reaction {sup 1}H(e,e'{Pi}{sup +})n.

Details

ISSN :
1089490X and 05562813
Volume :
78
Database :
OpenAIRE
Journal :
Physical Review C
Accession number :
edsair.doi.dedup.....1e9ec9043dfe92e8adbcd602100220d2
Full Text :
https://doi.org/10.1103/physrevc.78.045203