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arXiv 0802.3144hep-ph
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协变模型中矢量介子的电磁衰变

Electromagnetic Decays of Vector Mesons in a Covariant Model

Silvia Pisano, Tobias Frederico, Emanuele Pace, Giovanni Salme`

摘要:

本文提出了一个描述矢量介子轻扇区和重扇区电磁衰变的全协变模型。我们的方法的主要成分是:i)矢量介子的Bethe-Salpeter顶点的Ancillary,和ii)电磁衰减常数的Mandelstam式。我们的方法的自由参数是固定的,通过与在光锋哈密顿动力学框架内得到的横向动量分布与组分夸克的比较。的衰减常数和价分量的概率的初步结果。

英文摘要:

A fully covariant model for describing the electromagnetic decay of Vector Mesons, both in light and in heavy sectors, is presented. The main ingredients of our approach are i) an Ansatz for the Bethe-Salpeter vertex for Vector Mesons, and ii) a Mandelstam-like formula for the electromagnetic decay constant. The free parameters of our approach are fixed through a comparison with the transverse momentum distribution obtained within a Light-Front Hamiltonian Dynamics framework with constituent quarks. Preliminary results for both the decays constants and the probability of the valence component are shown.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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