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The Monte Carlo event generator YFSWW3 version 1.16 for W-pair production and decay at LEP2/LC energies

机译:蒙特卡洛事件发生器YFSWW3版本1.16,用于W对产生和LEP2 / LC能量衰减

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摘要

We present the Monte Carlo event generator YFSWW3 version 1.16 for the process of W-pair production and decay in electron-positron collisions. It includes O(α) electroweak radiative corrections in the WW production stage together with the O(α~3) initial-state-radiation (ISR) corrections in the leading-logarithmic (LL) approximation, implemented within the Yennie-Frautschi-Suura (YFS) exclusive exponentiation framework. The photon radiation in the W decays is generated by the dedicated program PHOTOS up to O(α~2) LL, normalized to the W branching ratios. The program is interfaced with the τ decay library TAUOLA and the quark fragmentation/hadronization package JETSET. The semi-analytical code KorWan for the calculations of the differential and total cross-sections at the Born level and in the ISR approximation is included.
机译:我们介绍了蒙特卡洛事件发生器YFSWW3版本1.16,用于W对产生和电子-正电子碰撞的衰减过程。它包括WW生产阶段的O(α)电弱辐射校正以及超前对数(LL)近似中的O(α〜3)初始状态辐射(ISR)校正,该方法在Yennie-Frautschi-Suura中实现(YFS)独家指数框架。 W衰变中的光子辐射由专用程序PHOTOS生成,直至O(α〜2)LL,并根据W分支比进行归一化。该程序与τ衰变库TAUOLA和夸克碎片化/强子化软件包JETSET连接。包括半解析代码KorWan,用于计算Born级和ISR近似中的微分截面和总截面。

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