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Isospin violation in phi, J/psi, psi[prime]-->omegapi0 via hadronic loops

Li, Gang, Zhao, Qiang and Zou, Bing-Song (2008) Isospin violation in phi, J/psi, psi[prime]-->omegapi0 via hadronic loops Physical Review D, 77 (014010). ISSN 1550-7998


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<p><p class="abstract">In<sup> </sup>this work, we study the isospin-violating decay of phi-->omegapi<sup>0</sup> and<sup> </sup>quantify the electromagnetic (EM) transitions and intermediate meson exchanges as<sup> </sup>two major sources of the decay mechanisms. In the EM<sup> </sup>decays, the present datum status allows a good constraint on<sup> </sup>the EM decay form factor in the vector meson dominance<sup> </sup>model, and it turns out that the EM transition can<sup> </sup>only account for about 1/4~1/3 of the branching ratio for<sup> </sup>phi-->omegapi<sup>0</sup>. The intermediate meson exchanges, <i>K</i>[overline K](<i>K</i><sup>*</sup>) (intermediate <i>K</i>[overline K] interaction via<sup> </sup><i>K</i><sup>*</sup> exchanges), <i>K</i>[overline K]<sup>*</sup>(<i>K</i>) (intermediate <i>K</i>[overline K]<sup>*</sup> rescattering via kaon exchanges), and<sup> </sup><i>K</i>[overline K]<sup>*</sup>(<i>K</i><sup>*</sup>) (intermediate <i>K</i>[overline K]<sup>*</sup> rescattering via <i>K</i><sup>*</sup> exchanges), which evade the<sup> </sup>naive Okubo-Zweig-Iizuka rule, serve as another important contribution to the<sup> </sup>isospin violations. They are evaluated with effective Lagrangians where explicit<sup> </sup>constraints from experiment can be applied. Combining these three contributions,<sup> </sup>we obtain results in good agreement with the experimental data.<sup> </sup>This approach is also extended to <i>J</i>/psi(psi<sup>[prime]</sup>)-->omegapi<sup>0</sup>, where we find<sup> </sup>contributions from the <i>K</i>[overline K](<i>K</i><sup>*</sup>), <i>K</i>[overline K]<sup>*</sup>(<i>K</i>), and <i>K</i>[overline K]<sup>*</sup>(<i>K</i><sup>*</sup>) loops are negligibly<sup> </sup>small, and the isospin violation is likely to be dominated<sup> </sup>by the EM transition.</p>

Item Type: Article
Additional Information: Published in Physical Review D, 77, 014010 (2008). &copy; 2008 The American Physical Society.
Divisions: Faculty of Engineering and Physical Sciences > Physics
Depositing User: Mr Adam Field
Date Deposited: 27 May 2010 14:06
Last Modified: 23 Sep 2013 18:26

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