极化偶极子
Polarizing the Dipoles
摘要：
我们扩展的无质量偶极形式主义的Catani和西摩，以及其大规模的版本开发的Catani，Dittmaier，西摩和Trocsanyi，任意螺旋度本征态的外部部分子。我们修改真正的辐射减法条款，主要目的是提高效率的数值蒙特卡罗积分的贡献作为一个完整的下一个领先的顺序计算的一部分。因此，我们的扩展只适用于非偏振散射。在对发射极对的螺旋度求和之后，我们的公式平凡地简化为它们的原始形式。我们实现我们的扩展的框架内的Helac-Phegas，并给出了一些例子的结果有关最近的研究背景的大型强子对撞机。代码是公开的。由于集成偶极子贡献不需要任何修改，我们不讨论它们，但它们在软件中实现。
英文摘要：
We extend the massless dipole formalism of Catani and Seymour, as well as its massive version as developed by Catani, Dittmaier, Seymour and Trocsanyi, to arbitrary helicity eigenstates of the external partons. We modify the real radiation subtraction terms only, the primary aim being an improved efficiency of the numerical Monte Carlo integration of this contribution as part of a complete next-to-leading order calculation. In consequence, our extension is only applicable to unpolarized scattering. Upon summation over the helicities of the emitter pairs, our formulae trivially reduce to their original form. We implement our extension within the framework of Helac-Phegas, and give some examples of results pertinent to recent studies of backgrounds for the LHC. The code is publicly available. Since the integrated dipole contributions do not require any modifications, we do not discuss them, but they are implemented in the software.
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。
