[SLAC] [SLAC Pubs and Reports]

SLAC-PUB-7391
Measurements of the Delta(1232) Transition Form Factor and the Ratio sigman/sigmap from Inelastic Electron-Proton and Electron-Deuteron Scattering

Abstract

\baselineskip 14pt Measurements of inclusive electron-scattering cross sections using hydrogen and deuterium targets in the region of the $\Delta$(1232) resonance are reported. A global fit to these new data and previous data in the resonance region is also reported for the proton. Transition form factors have been extracted from the proton cross sections for this experiment over the four-momentum transfer squared range $1.64 < Q^2 < 6.75$ (GeV/c)$^2$ and from previous data over the range $2.41 < Q^2 < 9.82$ (GeV/c)$^2$. The results confirm previous reports that the $\Delta$(1232) transition form factor decreases more rapidly with $Q^2$ than expected from perturbative QCD. The ratio of $\sigma _n /\sigma_p$ in the $\Delta$(1232) resonance region has been extracted from the deuteron data for this experiment in the range $1.64 < Q^2 < 3.75$ (GeV/c)$^2$ and for a previous experiment in the range $2.4 < Q^2 < 7.9$ (GeV/c)$^2$. A study has been made of the model dependence of these results. This ratio $\sigma _n/\sigma_p$ for $\Delta$(1232) production is slightly less than unity, while $\sigma _n/ \sigma_p$ for the nonresonant cross sections is approximately 0.5, which is consistent with deep inelastic scattering results. \end{minipage}

(Equations render on Windows, Mac OS, AIX, Linux, Solaris, and IRIX with the techexplorer plug-in.)

Full Text

PDF

Compressed PostScript

techexplorer

More Information

Full bibliographic data for this document, including its complete author list, is (or soon will be) available from SLAC's SPIRES-HEP Database.

Please report problems with this file to posting@slac.stanford.edu. The SLAC preprint inventory is provided by the SLAC Technical Publications Department.
Page generated 04 Apr 2001 @ 15:11 PDT by htmlme.pl