The ϱ radiative decay width: A measurement at 200 GeV

Capraro, L.; Lévy, P. h.; Querrou, M.; Van Hecke, B.; Verbeken, M.; Enorini, E.; Fabbri, F. L.; Laurelli, P.; Zallo, A.; Bellini, G.; Bonetti, S.; Fincato, A.; Leopold, M.; Menasce, D.; Meroni, E.; Moroni, L.; Pedrini, D.; Perasso, L.; Ragusa, F.; Sala, S.; Vittone, M.; Amendolla, S. R.; Batignani, G.; Bedeschi, A.; Bellamy, E. H.; Bertolucci, E.; Bosisio, L.; Bottigli, U.; Bradaschia, C.; Fidecaro, F.; Foá, L.; Focardi, Ettore; Giannetti, P.; Giorgi, M. A.; Marrocchesi, P. S.; Menzione, A.; Ristori, L.; Scribano, A.; Stefanini, A.; Tonelli, G.; Beck, G. A.; Bologna, G.; Green, M. G.; March, P. V.; Landon, M. P. J.; Strong, J. A.; Tenchini, R.

doi:10.1016/0550-3213(87)90233-1

The ϱ− radiative decay width has been measured by studying the production of ϱ− via the Primakoff effect by 200 GeV incident π− on Cu and Pb targets. This width was obtained by fitting the measured dσ/dt for ϱ production with the theoretical coherent differential cross section including both the electromagnetic and strong contributions. The measured radiative width value is 81 ± 4 ± 4 keV: it is consistent with the ratio View the MathML source as expected from the vector dominance and the quark model.

The ϱ radiative decay width: A measurement at 200 GeV / L. Capraro;Ph. Lévy;M. Querrou;B. Van Hecke;M. Verbeken;E. Enorini;F.L. Fabbri;P. Laurelli;A. Zallo;G. Bellini;S. Bonetti;A. Fincato;M. Leopold;D. Menasce;E. Meroni;L. Moroni;D. Pedrini;L. Perasso;F. Ragusa;S. Sala;M. Vittone;S.R. Amendolla;G. Batignani;A. Bedeschi;E.H. Bellamy;E. Bertolucci;L. Bosisio;U. Bottigli;C. Bradaschia;F. Fidecaro;L. Foá;E. Focardi;P. Giannetti;M.A. Giorgi;P.S. Marrocchesi;A. Menzione;L. Ristori;A. Scribano;A. Stefanini;G. Tonelli;G.A. Beck;G. Bologna;M.G. Green;P.V. March;M.P.J. Landon;J.A. Strong;R. Tenchini. - In: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - ELETTRONICO. - 288:(1987), pp. 659-680. [10.1016/0550-3213(87)90233-1]