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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2402.00431 |
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| _version_ | 1866929230841905152 |
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| author | Wang, Guoxing Xia, Tianya Yang, Li Lin Ye, Xiaoping |
| author_facet | Wang, Guoxing Xia, Tianya Yang, Li Lin Ye, Xiaoping |
| contents | The production of a Higgs boson in association with a top-antitop quark pair ($t\bar{t}H$) holds significant importance in directly probing the top-quark Yukawa coupling, which is related to various fundamental questions in high energy physics. This paper focuses on the calculation of two-loop amplitudes for $t\bar t H$ production at hadron colliders in the high-energy boosted limit. The calculation employs our recently developed mass-factorization formula. To validate the accuracy of our approximate methods, we compare our results for the one-loop amplitudes and the two-loop infrared poles with the exact calculations. We then provide predictions for the finite parts of the two-loop amplitudes. By combining the contributions from real emissions, our results can be utilized to compute the next-to-next-to-leading order differential cross sections for $t\bar t H$ production in the high-energy boosted limit. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_00431 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Two-loop QCD amplitudes for $t\bar{t}H$ production from boosted limit Wang, Guoxing Xia, Tianya Yang, Li Lin Ye, Xiaoping High Energy Physics - Phenomenology The production of a Higgs boson in association with a top-antitop quark pair ($t\bar{t}H$) holds significant importance in directly probing the top-quark Yukawa coupling, which is related to various fundamental questions in high energy physics. This paper focuses on the calculation of two-loop amplitudes for $t\bar t H$ production at hadron colliders in the high-energy boosted limit. The calculation employs our recently developed mass-factorization formula. To validate the accuracy of our approximate methods, we compare our results for the one-loop amplitudes and the two-loop infrared poles with the exact calculations. We then provide predictions for the finite parts of the two-loop amplitudes. By combining the contributions from real emissions, our results can be utilized to compute the next-to-next-to-leading order differential cross sections for $t\bar t H$ production in the high-energy boosted limit. |
| title | Two-loop QCD amplitudes for $t\bar{t}H$ production from boosted limit |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2402.00431 |