We report measurements of the electroproduction of single charged pions from hydrogen and deuterium targets for values of r in the range 0.35 < r < 0.45. Data were taken with a hydrogen target at the (W,Q ' ) points (2.15 GeV, 1.2 G~v~) ,(2.65, 2.0), (2.65, 3.4), (2.65, 6.0), and (2.65, 10.0). Data were taken with a deuterium target at the (W, Q ' ) points (2.15, 1.2) and (2.65, 2.0). The transverse cross section obtained by using these data in conjunction with earlier data at high E to separate the longitudinal and transverse components is used in ~onj~unction with the new data and the t -channel Born term to determine the pion form factor and to re-evaluate previously reported measurements. In the range 0.15 G~V~ < Q < 10.0 GeVZ the ' pion form factor can be described by the simple pole form [I + Q 2/(0.462 + 0.024)]-'.
Measurements of the electroproduction reaction e-+ pe -AX' f n carried out at the Wilson Synchrotron Laboratory a r e reported. For fixed virtual photon-hadron center-of-mass energy, W=2.67 GeV, data are presented with the mass of the virtual photon, -k 2 , centered at 0.6, 1.2, and 2.0 G~v'. At the central -k 2 =1.2 (GeV)' point, results are also given for W =2.15 GeV. For the W =2.67, -k 2 = 1.2 Gev2 setting, an angular scan is presented and the longitudinal transverse-interference term is extracted. The data are compared with an electric Born-model calculation of Berends which has a s its only free parameter the pion electromagnetic form factor. The theory is used to extract new results for the pion form factor up to -k 2 =2.0 G~v'.
We report measurements of kaon electroproduction from hydrogen and deuterium targets carried out at the Wilson Synchrotron Laboratory at Cornell IJniversity. The reactions y,,p--. K +xo, K 'A, and K '2' were studied in the kinematic region 2.15 5 W 5 3.1 GeV and 1.2 < Q' < 4.0 GeV' as a function of Q 2 , W, and w.
The Kcross sections fall much more rapidly with increasing Q than the K + A cross sections 50 that K A Z o /~~+ O as Q 2 increases.
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