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arXiv 1201.6622hep-ph
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自旋为1的粒子在光阵面中的电弱形状因子

Eletroweak Form Factors in the Light-Front for Spin-1 Particles

J. P. B. C. de Melo, T. Frederico

摘要:

自旋为1的复合粒子的光锋价波函数对电磁流的贡献不足以保证电流在旋转下的正确变换。在Drell-Yan-West坐标系中,在顶点的解析和协变模型中,电流的正分量的朴素推导导致了旋转对称性的破坏。在准Drell-Yan-West坐标系$q^+\rightarrow 0$中计算形状因子,我们能够用解析形式分离出Z图或零模的贡献。

英文摘要:

The contribution of the light-front valence wave function to the electromagnetic current of spin-1 composite particles is not enough to warranty the proper transformation of the current under rotations. The naive derivation of the plus component of the current in the Drell-Yan-West frame within an analytical and covariant model of the vertex leads to the violation of the rotational symmetry. Computing the form-factors in a quasi Drell-Yan-West frame $q^+\rightarrow 0$, we were able to separate out in an analytical form the contributions from Z-diagrams or zero modes using the instant-form cartesian polarization basis.

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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