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 Γ(ϱ --> πγ)/Γ(ω --> πγ) ~ case:1/9 as expected from the vector dominance and the quark model.
The ϱ radiative decay width: a measurement at 200 GeV
BOSISIO, LUCIANO;BUDINICH, MARCO;
1987-01-01
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 Γ(ϱ --> πγ)/Γ(ω --> πγ) ~ case:1/9 as expected from the vector dominance and the quark model.File in questo prodotto:
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