Next-to-leading order QCD corrections to a heavy resonance production and decay into top quark pair at the LHC
Next-to-leading order QCD corrections to a heavy resonance production and decay into top quark pair at the LHC
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对大型强子对撞机中重共振产生和衰变成顶夸克对的次领先阶 QCD 校正
DOI：
10.1103/physrevd.82.014020
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发表时间：
2010-04
期刊：
影响因子：
--
通讯作者：
Yuan, C-P.
中科院分区：
文献类型：
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作者：
Gao, Jun;Li, Chong Sheng;Li, Bo Hua;Zhu, Hua Xing;Yuan, C-P.
本文给出了LHC上重共振产生和衰变为顶夸克对的完整的次领先阶（NLO）QCD计算，其中共振可以是Randall-Sundrum Kaluza-Klein引力子G，也可以是额外规范玻色子Z{sup '}.对G和Z{sup '}，完全的非线性光学QCD修正可以使总截面分别增加约80%~ 100%和20%~ 40%，这取决于共振质量。我们还详细讨论了顶夸克极角分布的非线性光学修正，结果表明，对于Kaluza-Klein引力子，其非线性光学分布的形状可以不同于首阶分布.此外，我们还研究了通过上述过程产生的顶夸克对自旋关联的非线性光学修正，发现修正很小。
We present a complete next-to-leading order (NLO) QCD calculation to a heavy resonance production and decay into a top quark pair at the LHC, where the resonance could be either a Randall-Sundrum Kaluza-Klein graviton G or an extra gauge boson Z{sup '}. The complete NLO QCD corrections can enhance the total cross sections by about 80%-100% and 20%-40% for the G and the Z{sup '}, respectively, depending on the resonance mass. We also explore in detail the NLO corrections to the polar angle distributions of the top quark, and our results show that the shapes of the NLO distributions can be different from the leading order ones for the Kaluza-Klein graviton. Moreover, we study the NLO corrections to the spin correlations of the top quark pair production via the above process, and find that the corrections are small.