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arXiv 1108.0780nucl-th
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高自旋重子的一致相互作用

Consistent interactions for high-spin baryons

Tom Vrancx, Lesley De Cruz, Jan Ryckebusch, Pieter Vancraeyveld

摘要:

从相互作用拉格朗日量的规范不变性要求出发,构造了任意自旋离壳费米子场的一致相互作用。这些相互作用在强子过程中高自旋重子共振的量子强子动力学描述中起着至关重要的作用。我们发现,一个一致的相互作用的动量依赖的权力上升的费米子场的自旋。当用标准强子形状因子截断短距离物理时,这导致计算的树能级截面的能量依赖性中的非物理结构。提出了一种新的自旋相关的强子形状因子来抑制非物理伪影。

英文摘要:

Consistent interactions for off-shell fermion fields of arbitrary spin are constructed from the gauge-invariance requirement of the interaction Lagrangians. These interactions play a crucial role in the quantum hadrodynamical description of high-spin baryon resonances in hadronic processes. We find that the power of the momentum dependence of a consistent interaction rises with the spin of the fermion field. This leads to unphysical structures in the energy dependence of the computed tree-level cross sections when the short-distance physics is cut off with standard hadronic form factors. A novel, spin-dependent hadronic form factor is proposed that suppresses the unphysical artifacts.

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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