W^+W^+加上POWHEGBOX中的二喷流生产
W^+W^+ plus dijet production in the POWHEGBOX
摘要:
我们在POWHEG框架下实现了强子对撞机中W^+W^+两个喷注的产生,在QCD中的次领先级(NLO),这是一种允许NLO计算与蒙特卡罗程序淋浴接口的方法。这是在簇射蒙特卡罗框架内描述到NLO精度的第一个2 -> 4过程。该实现是在POWHEGBOX包中构建的。我们讨论了一些技术上的改进,需要在POWHEGBOX处理计算机密集型性质的非线性光学计算,并认为进一步的改进是可能的,使该方法可以匹配的复杂性,今天达到的非线性光学计算。我们已经将我们的POWHEG实现与PYTHIA和HERWIG连接起来,并提出了一些现象学结果,讨论了纯NLO和POWHEG+PYTHIA计算之间的相似性和差异,包括更排他性的分布。我们已经在POWHEGBOX网站上提供了相关代码。
英文摘要:
We present an implementation of the calculation of the production of W^+W^+ plus two jets at hadron colliders, at next-to-leading order (NLO) in QCD, in the POWHEG framework, which is a method that allows the interfacing of NLO calculations to shower Monte Carlo programs. This is the first 2 -> 4 process to be described to NLO accuracy within a shower Monte Carlo framework. The implementation was built within the POWHEGBOX package. We discuss a few technical improvements that were needed in the POWHEGBOX to deal with the computer intensive nature of the NLO calculation, and argue that further improvements are possible, so that the method can match the complexity that is reached today in NLO calculations. We have interfaced our POWHEG implementation with PYTHIA and HERWIG, and present some phenomenological results, discussing similarities and differences between the pure NLO and the POWHEG+PYTHIA calculation both for inclusive and more exclusive distributions. We have made the relevant code available at the POWHEGBOX web site.
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