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arXiv 0911.0572hep-ph
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WINHAC -强子碰撞中产生单个W玻色子的蒙特卡罗事件generator

WINHAC - the Monte Carlo event generator for single W-boson production in hadronic collisions

Wieslaw Placzek

摘要:

本文提出了一种用于带电流Drell-Yan过程的蒙特卡罗事件发生器WINHAC,即强子碰撞中轻子衰变产生单个W玻色子的过程。它具有多光子辐射内的Yennie-Frautschi-Suura独家指数计划与O(α)电弱校正。对于初始态QCD/QED部分子簇射和强子化,它直接与PYTHIA接口。它实现了质子-质子,质子-反质子和任何核-核碰撞的选项。此外,它还包括极化W玻色子产生和中性流Drell-Yan过程,都是在玻恩水平上。可以生成加权和未加权(权重=1)事件。WINHAC已经过彻底的数值测试,并与独立的蒙特卡罗程序(如HORACE和SANC)进行了交叉检查;在所谓的调谐比较中,已经达成了亚permil水平的协议。它也被用来作为一个基本的工具,发展和测试的标准模型参数在LHC的一些新的测量方法。

英文摘要:

We present the Monte Carlo event generator WINHAC for the charged-current Drell-Yan process, i.e. single W-boson production with leptonic decays in hadronic collisions. It features multiphoton radiationwithin the Yennie-Frautschi-Suura exclusive exponentiation scheme with O(alpha) electroweak corrections. For the initial-state QCD/QED parton shower and hadronisation it is interfaced directly to PYTHIA. It implements the options for proton-proton, proton-antipronton and any nucleus-nucleus collisions. Moreover, it includes the polarized W-boson production and the neutral current Drell-Yan process, both at the Born level. Generation of weighted as well as unweighted (weight=1) events is possible. WINHAC has been thoroughly tested numerically and cross-checked with independent Monte Carlo programs, such as HORACE and SANC; in the so-called tuned comparisons, an agreement at the sub-permil-level has been reached. It has also been used as a basic tool for developing and testing some new measurement methods of the Standard Model parameters at the LHC.

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