Parameter differences of the charged and neutral rho-meson family

Details Parameter differences of the charged and neutral rho-meson family Parameter differences of the charged and neutral rho-meson family

2009-10-12

arxiv.org/abs/0910.2123v1

Nucl.Phys.Proc.Suppl.198:186-189,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

10.1016/j.nuclphysbps.2009.12.03

New very precise KLOE data on $\m{e}^+\m{e}^-\to\pi^+\pi^-$ obtained by radiative return method in Frascati are unified with corrected CMD-2 and SND Novosibirsk $\m{e}^+\m{e}^-\to\pi^+\pi^-$ data and supplemented below and beyond by older data in order to be described by the unitary and analytic pion electromagnetic form factor model, which provides the most precise neutral $\rho$-meson family parameters. Then the recently appeared accurate Belle (KEK) data of the weak pion form factor are described by the same unitary and analytic model, as it follows from the CVC hypothesis, providing the charged $\rho$-meson family parameters. As a result the most reliable parameter differences of the $\rho$-meson family are determined.

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