The radiative return at Φ - and B -factories: FSR at next-to-leading order ⋆
The radiative return at Φ - and B -factories: FSR at next-to-leading order ⋆
复制标题
Φ 和 B 工厂的辐射返回：FSR 处于次领先顺序 ⋆
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
Germán Rodrigo
中科院分区：
文献类型：
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作者：
H. Czyz;A. Grzelińska;Johann H. Kühn;Germán Rodrigo
.测量π介子的形状因子，以及更一般的正负电子通过辐射返回湮灭成强子的截面，已成为高光度对撞机（如Φ介子工厂或B介子工厂）的重要任务。为了详细了解和分析这种反应，已经进行了蒙特卡罗程序PHOKHARA的构建。版本2.0是基于次领先阶（NLO）处理的初始状态辐射（ISR）的修正。在本文中，进一步扩展PHOKHARA（3.0版），其中包括非线性光学修正的最终状态辐射（FSR）。结合ISR和FSR对各种分布的影响进行了研究，并提出了方法，这将允许提取形状因子，甚至可以获得由于FSR而产生的包容性光子发射。FSR模型上的结果的依赖性进行了讨论，这种贡献的μ子的异常磁矩的影响进行了评估。
. The measurement of the pion form factor and, more generally, of the cross section for electron– positron annihilation into hadrons through the radiative return has become an important task for high luminosity colliders such as the Φ - or B -meson factories. For detailed understanding and analysis of this reaction, the construction of a Monte Carlo program, PHOKHARA, has been undertaken. Version 2.0 was based on a next-to-leading order (NLO) treatment of the corrections from initial-state radiation (ISR). In the present paper a further extension of PHOKHARA (version 3.0) is described, which incorporates NLO corrections to final-state radiation (FSR). The impact of combined ISR and FSR on various distributions is investigated and methods are presented, which will allow the extraction of the form factor, and even give access to inclusive photon emission due to FSR. The dependence of the results on the model for FSR is discussed and the impact of this contribution on the anomalous magnetic moment of the muon is evaluated.