arXiv 1107.44672011-07hep-ph

GR @ PPA 2.8：强子碰撞中弱玻色子产生过程的初态喷流匹配

GR@PPA 2.8: initial-state jet matching for weak boson production processes at hadron collisions

Shigeru Odaka, Yoshimasa Kurihara

备注：: 29 pages, 14 figures; minor changes to clarify the discussions, and corrections of typos
DOI：: 10.1016/j.cpc.2011.12.023

摘要：

在GR@PPA事件发生器的框架下，将我们以前研究中引入的初态喷注匹配方法应用于强子碰撞中单个$W$和$Z$产生过程以及双玻色子（$W^{+}W^{-}$，$WZ$和$ZZ$）产生过程的事件发生.所产生的事件在整个运动学区域连续地再现弱玻色子的横动量谱。硬交互作用的矩阵元素（ME）仍然在树的层次上。与以前的版本一样，弱玻色子的衰变也包含在矩阵元素中。因此，弱玻色子衰变中的自旋关联和相空间效应在树水平上是精确的。该程序包包括定制的部分子淋浴程序，以及ME为基础的硬相互作用发生器，以实现自洽射流匹配。生成的事件可以被传递到通用的事件发生器，使模拟进行到强子水平。

英文摘要：

The initial-state jet matching method introduced in our previous studies has been applied to the event generation of single $W$ and $Z$ production processes and diboson ($W^{+}W^{-}$, $WZ$ and $ZZ$) production processes at hadron collisions in the framework of the GR@PPA event generator. The generated events reproduce the transverse momentum spectra of weak bosons continuously in the entire kinematical region. The matrix elements (ME) for hard interactions are still at the tree level. As in previous versions, the decays of weak bosons are included in the matrix elements. Therefore, spin correlations and phase-space effects in the decay of weak bosons are exact at the tree level. The program package includes custom-made parton shower programs as well as ME-based hard interaction generators in order to achieve self-consistent jet matching. The generated events can be passed to general-purpose event generators to make the simulation proceed down to the hadron level.

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英文摘要：

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