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arXiv 1011.2693hep-ph
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在CERN大型强子对撞机上对$A^{0}γ$相关产生的次领先阶QCD预言

Next-to-leading order QCD predictions for $A^{0}γ$ associated production at the CERN Large Hadron Collider

Liang Dai, Ding Yu Shao, Chong Sheng Li, Jun Gao, Hao Zhang

摘要:

在CERN大型强子对撞机(LHC)上,计算了最小超对称标准模型(MSSM)中相关产生过程$pp\rightarrow A^{0}γ+X$全截面的完全次领先阶(NLO)QCD修正(包括SUSY QCD修正).我们的结果表明,对于200 GeV的$<m_{A}<500$和$\tanβ=50$,非线性光学QCD修正的总截面增强可以达到$15%\sim20%$.通过非线性光学修正,总截面的尺度依赖性得到改善,改善幅度小于5%。我们还显示了蒙特卡罗模拟结果的$τ^{+}τ^{-}+γ$签名,包括完整的非线性光学QCD效应,并发现一个可观察到的签名以上的标准模型(SM)的背景下,正常的亮度为100 fb $^{-1}$在大型强子对撞机。

英文摘要:

We calculate the complete next-to-leading-order (NLO) QCD corrections (including SUSY QCD corrections) to the inclusive total cross sections of the associated production processes $pp\rightarrow A^{0}γ+X$ in the minimal supersymmetric standard model (MSSM) at the CERN Large Hadron Collider (LHC). Our results show that the enhancement of the total cross sections from the NLO QCD corrections can reach $15%\sim20%$ for 200 GeV$<m_{A}<500$ GeV and $\tanβ=50$. The scale dependence of the total cross section is improved by the NLO corrections, which is less than 5%. We also show the Monte Carlo simulation results for the $τ^{+}τ^{-}+γ$ signature including the complete NLO QCD effects, and find an observable signature above the standard model (SM) background for a normal luminosity of 100 fb$^{-1}$ at the LHC.

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