Vector meson dominance, chiral loops, sigma meson, and omega-rho mixing in omega ->pi(0)pi(0)gamma decay

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2003-04-01

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Gokalp, A
Kucukarslan, A
Yılmaz, Osman

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In an attempt to explain the latest experimental result about the branching ratio of omega-->pi(0)pi(0)gamma decay, we reexamine the mechanism of this decay in a phenomenological framework in which the contributions of vector meson dominance, chiral loops, sigma-meson intermediate state amplitudes, and the effects of omega-rho mixing are considered. We conclude that in order to obtain the experimental value of the branching ratio B(omega-->pi(0)pi(0)gamma) the sigma-meson amplitude, which makes a substantial contribution, should be included in the reaction mechanism and the effects of omega-rho mixing should be taken into account. We also estimate the coupling constant g(omegasigmagamma) as g(omegasigmagamma)=0.11, which is much smaller than the values suggested by light cone QCD sum rule calculations.

URI

https://hdl.handle.net/11511/94902

Journal

PHYSICAL REVIEW D

DOI

https://doi.org/10.1103/physrevd.67.073008

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Department of Physics, Article

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Vector meson dominance, chiral loops, sigma meson, and omega-rho mixing in omega ->pi(0)pi(0)gamma decay Gokalp, A; Kucukarslan, A; Yılmaz, Osman (2003-04-01) In an attempt to explain the latest experimental result about the branching ratio of omega-->pi(0)pi(0)gamma decay, we reexamine the mechanism of this decay in a phenomenological framework in which the contributions of vector meson dominance, chiral loops, sigma-meson intermediate state amplitudes, and the effects of omega-rho mixing are considered. We conclude that in order to obtain the experimental value of the branching ratio B(omega-->pi(0)pi(0)gamma) the sigma-meson amplitude, which makes a substantia...
sigma-meson and omega-rho mixing effects in omega ->pi(+)pi(-)gamma decay Gokalp, A; Kucukarslan, A; Solmaz, S; Yılmaz, Osman (2003-08-01) We calculate the branching ratio of omega --> pi(+)pi(-)gamma decay in a phenomenological framework in which the contributions of VMD, chiral loops, sigma-meson intermediate state amplitudes and the effects of omega-rho mixing axe considered. We conclude that the sigma-meson intermediate state amplitude-and omega-rho mixing make substantial contribution to the branching ratio.
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Citation Formats

A. Gokalp, A. Kucukarslan, and O. Yılmaz, “Vector meson dominance, chiral loops, sigma meson, and omega-rho mixing in omega ->pi(0)pi(0)gamma decay,” PHYSICAL REVIEW D, vol. 67, no. 7, pp. 0–0, 2003, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/94902.