Scalar production and decay to top quarks including interference effects at NLO in QCD in an EFT approach
文献类型：期刊论文
| 作者 | Zhang C(张岑); Vryonidou, E; Franzosi, DB; Zhang, C |
| 刊名 | JOURNAL OF HIGH ENERGY PHYSICS
 |
| 出版日期 | 2017 |
| 期号 | 10页码:96 |
| 关键词 | NLO Computations QCD Phenomenology |
| ISSN号 | 1029-8479 |
| DOI | 10.1007/JHEP10(2017)096 |
| 文献子类 | Article |
| 英文摘要 | Scalar and pseudo-scalar resonances decaying to top quarks are common predictions in several scenarios beyond the standard model (SM) and are extensively searched for by LHC experiments. Challenges on the experimental side require optimising the strategy based on accurate predictions. Firstly, QCD corrections are known to be large both for the SM QCD background and for the pure signal scalar production. Secondly, leading order and approximate next-to-leading order (NLO) calculations indicate that the interference between signal and background is large and drastically changes the lineshape of the signal, from a simple peak to a peak-dip structure. Therefore, a robust prediction of this interference at NLO accuracy in QCD is necessary to ensure that higher-order corrections do not alter the lineshapes. We compute the exact NLO corrections, assuming a point-like coupling between the scalar and the gluons and consistently embedding the calculation in an effective field theory within an automated framework, and present results for a representative set of beyond the SM benchmarks. The results can be further matched to parton shower simulation, providing more realistic predictions. We find that NLO corrections are important and lead to a significant reduction of the uncertainties. We also discuss how our computation can be used to improve the predictions for physics scenarios where the gluon-scalar loop is resolved and the effective approach is less applicable. |
| WOS关键词 | HIGGS-BOSON PRODUCTION ; HADRON COLLIDERS ; PAIR PRODUCTION ; PLUS PS ; LHC ; T(T)OVER-BAR ; PREDICTIONS ; MECHANISM |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000412911200005 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/284631]  |
| 专题 | 高能物理研究所_理论物理室 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Zhang C,Vryonidou, E,Franzosi, DB,et al. Scalar production and decay to top quarks including interference effects at NLO in QCD in an EFT approach[J]. JOURNAL OF HIGH ENERGY PHYSICS,2017(10):96. |
| APA | 张岑,Vryonidou, E,Franzosi, DB,&Zhang, C.(2017).Scalar production and decay to top quarks including interference effects at NLO in QCD in an EFT approach.JOURNAL OF HIGH ENERGY PHYSICS(10),96. |
| MLA | 张岑,et al."Scalar production and decay to top quarks including interference effects at NLO in QCD in an EFT approach".JOURNAL OF HIGH ENERGY PHYSICS .10(2017):96. |
入库方式： OAI收割
来源：高能物理研究所
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