Charged pion form factor between Q{sup 2}=0.60 and 2.45 GeV{sup 2}. I. Measurements of the cross section for the {sup 1}H(e,e{sup '}{pi}{sup +})n reaction

Cross sections for the reaction {sup 1}H(e,e{sup '}{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...

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Bibliographic Details
Published in:Physical review. C, Nuclear physics Nuclear physics, 2008-10, Vol.78 (4)
Main Authors: Blok, H. P., NIKHEF, Postbus 41882, NL-1009 DB Amsterdam, Horn, T., Physics Division, TJNAF, Newport News, Virginia 23606, Huber, G. M., Brash, E. J., Kovaltchouk, V., Lolos, G. J., Meer, R. L. J. van der, Vidakovic, S., Xu, C., Beise, E. J., Breuer, H., Chang, C. C., Chant, N., Gustafsson, K., King, P. M., Liu, J., Roos, P. G., Gaskell, D., Mack, D. J., Abbott, D.
Format: Article
Language:English
Subjects:
ACCELERATOR FACILITIES
CALIBRATION
CEBAF ACCELERATOR
CROSS SECTIONS
ELECTRON BEAMS
FORM FACTORS
FOUR MOMENTUM TRANSFER
GEV RANGE 01-10
HYDROGEN 1 TARGET
MASS
NEUTRONS
NUCLEAR PHYSICS AND RADIATION PHYSICS
NUCLEAR REACTIONS
NUCLEONS
PHOTONS
PIONS
SIMULATION
STRUCTURE FUNCTIONS
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Summary:Cross sections for the reaction {sup 1}H(e,e{sup '}{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{sup '}{pi}{sup +})n.
ISSN:0556-2813
1089-490X
DOI:10.1103/PHYSREVC.78.045202