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arXiv 0710.0826hep-ph
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CERN大型强子对撞机MSSM中关联带电Higgs和W玻色子产生的次领先阶PDKEEPAAA效应

Next-to-leading order QCD effects in associated charged Higgs and W boson production in the MSSM at the CERN Large Hadron Collider

Jun Gao, Chong Sheng Li, Zhao Li

摘要:

本文计算了在CERN大型强子对撞机上最小超对称标准模型中$b\bar{b}$湮灭产生$W^{\pm}H^{\mp}$的次领先阶QCD修正.非线性光学QCD修正既可以增强也可以减小总截面,但它们通常有效地减小了总截面对重整化/因子化标度的依赖性。非线性光学QCD修正的幅度在大部分参数空间中约为10%,在某些参数区域可达15%。我们还给出了包含NLO QCD效应的$W^{\pm}$和$H^{\mp}$衰变的$2j+τ_{jet}+\not{p}_{T}$信号的蒙特卡罗模拟结果,并在最小超引力模型的某些参数区域内发现了一个在$5σ$能级上的可观测信号。

英文摘要:

We present the calculations of the next-to-leading order (NLO) QCD corrections to the inclusive total cross sections for the associated production of the $W^{\pm}H^{\mp}$ through $b\bar{b}$ annihilation in the Minimal Supersymmetric Standard Model at the CERN Large Hadron Collider. The NLO QCD corrections can either enhance or reduce the total cross sections, but they generally efficiently reduce the dependence of the total cross sections on the renormalization/factorization scale. The magnitude of the NLO QCD corrections is about 10% in most of the parameter space and can reach 15% in some parameter regions. We also show the Monte Carlo simulation results for the $2j+τ_{jet}+\not{p}_{T}$ signature from the $W^{\pm}$ and the $H^{\mp}$ decays including the NLO QCD effects, and find an observable signal at a $5σ$ level in some parameter region of the minimal supergravity model.

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