A measurement of the space-like pion electromagnetic form factor

Amendolia, S. R.; Arik, M.; Badelek, B.; Batignani, G.; Beck, G. A.; Bedeschi, F.; Bellamy, E. H.; Bertolucci, E.; Bettoni, D.; Bilokon, H.; Bologna, G.; Bosisio, L.; Bradaschia, C.; Budinich, M.; Codino, A.; Dell'Orso, M.; D'Ettorre Piazzli, B.; Enorini, M.; Fabbri, F. L.; Fidecaro, F.; Foà, L.; Focardi, Ettore; Frank, S. G. F.; Giazotto, A.; Giorgi, M. A.; Green, M. G.; Harvey, J.; Heath, G. P.; Landon, M. P. J.; Laurelli, P.; Liello, F.; Mannocchi, G.; March, P. V.; Marrocchesi, P. S.; Menzione, A.; Meroni, E.; Morini, E.; Moroni, L.; Milotti, E.; Picchi, P.; Ragusa, F.; Ristori, L.; Ristori, L.; Rolandi, L.; Sala, S.; Saltmarsh, C. G.; Saoucha, A.; Satta, L.; Scribano, A.; Spillantini, P.; Stefanini, A.; Storey, D.; Strong, J. A.; Tenchini, R.; Tonelli, G.; Triggiani, G.; Von Schlippe, W.; Van Herwijnen, E.; Zallo, A.

doi:10.1016/0550-3213(86)90437-2

The pion form factor has been measured in the space-like q2 region 0.014 to 0.26 (GeV/c)2 by scattering 300 GeV pions from the electrons of a liquid hydrogen target. A detailed description is given of the apparatus, data analysis and corrections to the data. The mean square charge radius extracted from the data is model-dependent. We find that a form which includes a realistic description of the form factor phase gives a similar results to the naive pole form, and conclude 〈r2π〉 = 0.438±0.008 fm2.

A measurement of the space-like pion electromagnetic form factor / S.R. Amendolia, M. Arik, B. Badelek, G. Batignani, G.A. Beck, F. Bedeschi, E.H. Bellamy, E. Bertolucci, D. Bettoni, H. Bilokon, G. Bologna, L. Bosisio, C. Bradaschia, M. Budinich, A. Codino, M. Dell'Orso, B. D'Ettorre Piazzli, M. Enorini, F.L. Fabbri, F. Fidecaro, et al.. - In: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - STAMPA. - 277:(1986), pp. 168-196. [10.1016/0550-3213(86)90437-2]