Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-09-13
Eur.Phys.J.A16:209-219,2003
Physics
High Energy Physics
High Energy Physics - Phenomenology
22 pages, 1 eps fig
Scientific paper
10.1140/epja/i2002-10084-x
Isospin violating mixing of \rho- and \omega-mesons is reconsidered in terms of propagators. Its influence on various pairs of (\rho^0,\omega)-decays to the same final states is demonstrated. Some of them, (\rho^0,\omega)\to\pi^+\pi^- and (\rho^0,\omega)\to\pi^0\gamma, have been earlier discussed in the literature, others (e.g., (\rho^0,\omega)\to\eta\gamma and (\rho^0,\omega)\to e^+e^-) are new in this context. Changes in partial widths for all the decay pairs are shown to be correlated. The set of present experimental data, though yet inconclusive, provides some limits for the direct (\rho\omega)-coupling and indirectly supports enhancement of \rho^0\to\pi^0\gamma in comparison with \rho^{\pm}\to\pi^{\pm}\gamma, though not so large as in some previous estimates.
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