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arXiv 1504.00892hep-ph
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IR改进的DGLAP-CS QCD在Pythia8中的Parton簇射

IR-Improved DGLAP-CS QCD Parton Showers in Pythia8

B. F. L. Ward

摘要:

我们介绍了最近发展的IR改进DGLAP-CS理论到Pythia 8中的簇射,因为这种蒙特卡罗事件发生器在LHC中被广泛使用。我们表明,正如它是真实的IR改进的淋浴蒙特卡罗Herwiri,实现了IR改进的DGLAP-CS理论在Herwig6.5环境中,软限制的过程,如单个重规范玻色子生产现在更多的物理在IR改进的DGLAP-CS理论版本的Pythia 8。这为人们在一些LHC实验的实际探测器模拟之间进行比较开辟了道路,因为Pythia 8用于LHC的探测器模拟,而Herwig 6.5,文献中唯一的其他IR改进的DGLAP-CS QCD MC的环境,Herwiri1.031,不再使用。我们实现了IR改进的DGLAP-CS Pythia 8的可用性,这是作者及其合作者正在开发的LHC精密理论计划的进一步发展的重要一步。

英文摘要:

We introduce the recently developed IR-improved DGLAP-CS theory into the showers in Pythia8, as this Monte Carlo event generator is in wide use at LHC. We show that, just as it was true in the IR-improved shower Monte Carlo Herwiri, which realizes the IR-improved DGLAP-CS theory in the Herwig6.5 environment, the soft limit in processes such as single heavy gauge boson production is now more physical in the IR-improved DGLAP-CS theory version of Pythia8. This opens the way to one's getting a comparison between the actual detector simulations for some of the LHC experiments between IR-improved and unimproved showers as Pythia8 is used in detector simulations at LHC whereas Herwig6.5, the environment of the only other IR-improved DGLAP-CS QCD MC in the literature, Herwiri1.031, is not any longer so used. Our achieving the availability of the IR-improved DGLAP-CS Pythia8 then is an important step in the further development of the LHC precision theory program under development by the author and his collaborators.

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