Radiative decays of the Y(3940), Z(3930), and the X(4160) as dynamically generated resonances

Radiative decays of the Y(3940), Z(3930), and the X(4160) as dynamically generated resonances
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DOI:
10.1103/physrevd.83.114015
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发表时间:
2010-10
期刊:
影响因子:
5
通讯作者:
T. Branz;R. Molina;E. Oset
T. Branz;R. Molina;E. Oset
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
T. Branz;R. Molina;E. Oset

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我们研究了在酉化隐藏规范形式主义框架中由矢量介子-矢量介子相互作用动态生成的类粲素 X、Y 和 Z 介子的辐射衰变特性。在本工作中,我们在矢量介子优势形式主义的框架中计算了隐藏魅力 Y(3940)、Z(3930)(或 X(3915))和 X(4160) 介子的一光子和两光子衰变宽度。在 X(3915) 的两个光子宽度的情况下,我们与实验获得了很好的一致性,我们将其与我们在 3922 MeV 处发现的 $2^+$ 共振相关联。
We study the radiative decay properties of the charmonium-like X, Y and Z mesons generated dynamically from vector meson-vector meson interaction in the framework of a unitarized hidden-gauge formalism. In the present work we calculate the one- and two-photon decay widths of the hidden-charm Y(3940), Z(3930) (or X(3915)) and X(4160) mesons in the framework of the vector meson dominance formalism. We obtain good agreement with experiment in case of the two photon width of the X(3915) which we associate with the $2^+$ resonance that we find at 3922 MeV.