Measurement of the Sigma^- Charge Radius by Sigma^- Electron Elastic Scattering
High Energy Physics - Experiment
2010-05-28 v2 High Energy Physics - Phenomenology
Abstract
The Sigma^- mean squared charge radius has been measured in the space-like Q^2 range 0.035-0.105 GeV^2/c^2 by elastic scattering of a Sigma^- beam off atomic electrons. The measurement was performed with the SELEX (E781) spectrometer using the Fermilab hyperon beam at a mean energy of 610 GeV/c. We obtain <r^2> = (0.61 +/- 0.12 (stat.) +/- 0.09 (syst.)) fm^2. The proton and pi^- charge radii were measured as well and are consistent with results of other experiments. Our result agrees with the recently measured strong interaction radius of the Sigma^-.
Keywords
Cite
@article{arxiv.hep-ex/0106053,
title = {Measurement of the Sigma^- Charge Radius by Sigma^- Electron Elastic Scattering},
author = {SELEX Collaboration and I. Eschrich},
journal= {arXiv preprint arXiv:hep-ex/0106053},
year = {2010}
}
Comments
12 pages, 4 figures, LaTeX, submitted to Phys Lett B. Revised: minor changes in text and references