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arXiv 1202.0080hep-phhep-ex
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QCD对ILC生产的$γγb\bar b$的纠正

QCD corrections to the $γγb\bar b$ production at the ILC

Guo Lei, Zhang Ren-You, Ma Wen-Gan, Han Liang

摘要:

如果Higgs玻色子与$Z^0$玻色子一起产生,而$Z^0$玻色子随后在ILC中通过$Z^0 \to b\bar b$衰变,那么$e^+e^- \to γγb\bar b$就是测量$H^0 \to γγ$衰变宽度的一个不可约的背景过程.本文研究了标准模型中${\cal O}(α_s)$ QCD修正对$e^+e^- \to γγb\bar b$过程观测量的影响。我们研究了首阶和${\cal O}(α_s)$ QCD修正截面对碰撞能量和附加喷流否决方案的依赖性。我们还给出了LO和${\cal O}(α_s)$ QCD修正的末态粒子横动量分布以及$b\bar b$ -和$γγ$ -对的不变质量。

英文摘要:

The $e^+e^- \to γγb\bar b$ is an irreducible background process in measuring the $H^0 \to γγ$ decay width, if Higgs boson is produced in association with a $Z^0$-boson which subsequently decays via $Z^0 \to b\bar b$ at the ILC. In this paper we study the impact of the ${\cal O}(α_s)$ QCD corrections to the observables of the $e^+e^- \to γγb\bar b$ process in the standard model. We investigate the dependence of the leading-order and ${\cal O}(α_s)$ QCD corrected cross sections on colliding energy and the additional jet veto schemes. We also present the results of the LO and ${\cal O}(α_s)$ QCD corrected distributions of the transverse momenta of final particles, and the invariant masses of $b\bar b$- and $γγ$-pair.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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