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arXiv 1306.4882hep-ph
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作为末态相互作用效应的张量介子光生

Tensor meson photoproduction as a final state interaction effect

Lukasz Bibrzycki, Robert Kaminski

摘要:

该模型描述了末态下π介子-π介子相互作用产生的f_2(1270)介子。将张量介子视为由于终态相互作用而动态创建的对象是一种方便而直接的方法,可以使用π π散射的数据,如相移和非弹性来描述(光)生产反应,同时保留振幅,两粒子幺正性和交叉对称性的适当分析结构。本文提出的模型可以提供实验上可检验的量,如微分截面和pi pi质量分布,以及对应于不同f_2(1270)螺旋度的分波强度,这对于分波分析是必不可少的。它也可以用来计算角分布和自旋密度矩阵元素的矩,其中分波干涉效应是重要的。

英文摘要:

The model is presented to describe the f_2(1270) meson photoproduction as a result of pion-pion interactions in the final state. Treating tensor mesons as objects dynamically created due to final state interactions is a convenient and straightforward way to employ data from pi pi scattering like phase shifts and inelasticities for description of (photo)production reactions while retaining proper analytical structure of amplitudes, two particle unitarity and crossing symmetry. The model presented here can provide experimentally testable quantities like differential cross sections and pi pi mass distributions as well as the strengths of partial waves corresponding to various f_2(1270) helicities which are essential for partial wave analyses. It can also be used to compute moments of angular distribution and spin density matrix elements where partial wave interference effects are important.

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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