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 GAMMA(ro -> pi g)/GAMMA(omega -> pi g) ~ 1/9 source as expected from the vector dominance and the quark model.
The rho-radiative decay width : a measurement at 200 gev / L. Capraro, P. Levy, M. Querrou, B. Vanhecke, M. Verbeken, E. Enorini, F. 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. Amendolia, G. Batignani, A. Bedeschi, E. Bellamy, E. Bertolucci, L. Bosisio, U. Bottigli, C. Bradaschia, F. Fidecaro, L. Foa, E. Focardi, P. Giannetti, M. Giorgi, P. Marrocchesi, A. Menzione, L. Ristori, A. Scribano, A. Stefanini, G. Tonelli, G. Beck, G. Bologna, B. Piazzoli, G. Mannocchi, P. Picchi, M. Budinich, F. Liello, N. Paver, L. Rolandi, M. Green, P. March, M. Landon, J. Strong, R. Tenchini. - In: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - 288:C(1987), pp. 659-680. [10.1016/0550-3213(87)90233-1]
The rho-radiative decay width : a measurement at 200 gev
G. Bellini;S. Bonetti;E. Meroni;F. Ragusa;
1987
Abstract
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 GAMMA(ro -> pi g)/GAMMA(omega -> pi g) ~ 1/9 source as expected from the vector dominance and the quark model.
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