Статья

Next-to-leading order QCD corrections to a heavy resonance production and decay into top quark pair at the LHC

Jun GaoDepartment of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, ChinaChong Sheng LiDepartment of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, ChinaBo Hua LiDepartment of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, ChinaHua Xing ZhuDepartment of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, ChinaC.–P. YuanDepartment of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China

2010en

ABI

Аннотация

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 ${Z}^{\ensuremath{'}}$. The complete NLO QCD corrections can enhance the total cross sections by about 80%--100% and 20%--40% for the $G$ and the ${Z}^{\ensuremath{'}}$, 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.

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Идентификаторы

DOI: 10.1103/physrevd.82.014020

Цитирования и источники

Цитирований: 2Использованных источников: 0

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