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Measurement of the Pion Form-factor in the Timelike Region for $q^2$ Values Between .1-{GeV}/$c^2$ and .18-{GeV}/$c^2$

Amendolia, S.R. ; Badelek, B. ; Batignani, G. ; et al.

Phys.Lett.B 138 (1984) 454-458, 1984.

Inspire Record 195944 DOI 10.17182/hepdata.30572

The EM form factor of the pion has been studied in the time-like region by measuring σ (e + e − → π + π − ) normalized to σ (e + e − → μ + μ − ). Results have been obtained for q 2 down to the physical threshold.

1 data table

Table 1

No description provided.

Measurement of the $\pi^-$ Form-factor

Dally, E.B. ; Drickey, Darrell James ; Hauptman, J.M. ; et al.

Phys.Rev.D 24 (1981) 1718-1735, 1981.

Inspire Record 172687 DOI 10.17182/hepdata.26467

An experiment to measure the electromagnetic form factor of the negative π meson has been carried out at Fermilab by elastically scattering 100-GeV/c pions from the atomic electrons in a liquid-hydrogen target. We find that the elastic differential scattering cross section is characterized by a root-mean-square pion charge radius of 0.56±0.04 fm. This paper described our experimental design, measurement resolutions, event triggering logic, event reconstruction, experimental corrections, and form-factor results.

3 data tables

Table 1

No description provided.

Table 2

Axis error includes +- 0.54/0.54 contribution (EVENT-FINDING CORRECTIONS).

Table 3

No description provided.