Four top final states with NLO accuracy in perturbative QCD: 3 lepton channel
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arXiv
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| Format: | Preprint |
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2024
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| author | Dimitrakopoulos, Nikolaos Worek, Malgorzata |
| author_facet | Dimitrakopoulos, Nikolaos Worek, Malgorzata |
| contents | We examine the effect of higher-order QCD corrections on the four top-quark production cross section in the $3$ lepton decay channel. Top-quark and $W$ gauge-boson decays are included at next-to-leading order in perturbative QCD. The narrow-width approximation, that preserves spin correlations, is used to perform the calculation for this complex $2 \to 12 \,(13)$ process. We present differential cross-section distributions of top-quark decay products for the LHC Run III energy of $\sqrt{s}=13.6$ TeV, using realistic selection cuts. Our results show that QCD corrections and jet radiation in top-quark and $W$ decays can lead to significant changes in shapes of basic kinematic distributions and, therefore, need to be included for the accurate description of $pp \to t\bar{t}t\bar{t}+X$ process in the $3\ell$ decay channel. The NLO QCD results obtained in this work are important in the context of the recent observation of the $pp\to t\bar{t}t\bar{t}+X$ process by the ATLAS and CMS collaborations and are of great significance for the High-Luminosity phase of the LHC. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2410_05960 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Four top final states with NLO accuracy in perturbative QCD: 3 lepton channel Dimitrakopoulos, Nikolaos Worek, Malgorzata High Energy Physics - Phenomenology High Energy Physics - Experiment We examine the effect of higher-order QCD corrections on the four top-quark production cross section in the $3$ lepton decay channel. Top-quark and $W$ gauge-boson decays are included at next-to-leading order in perturbative QCD. The narrow-width approximation, that preserves spin correlations, is used to perform the calculation for this complex $2 \to 12 \,(13)$ process. We present differential cross-section distributions of top-quark decay products for the LHC Run III energy of $\sqrt{s}=13.6$ TeV, using realistic selection cuts. Our results show that QCD corrections and jet radiation in top-quark and $W$ decays can lead to significant changes in shapes of basic kinematic distributions and, therefore, need to be included for the accurate description of $pp \to t\bar{t}t\bar{t}+X$ process in the $3\ell$ decay channel. The NLO QCD results obtained in this work are important in the context of the recent observation of the $pp\to t\bar{t}t\bar{t}+X$ process by the ATLAS and CMS collaborations and are of great significance for the High-Luminosity phase of the LHC. |
| title | Four top final states with NLO accuracy in perturbative QCD: 3 lepton channel |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2410.05960 |