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Towards two-loop QCD corrections to $ \mathbf{pp \to t \bar{t} j}$
by Colomba Brancaccio
Submission summary
| Authors (as registered SciPost users): | Colomba Brancaccio |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202411_00046v1 (pdf) |
| Date accepted: | Dec. 27, 2024 |
| Date submitted: | Nov. 22, 2024, 4:36 p.m. |
| Submitted by: | Brancaccio, Colomba |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | The 17th International Workshop on Top Quark Physics (TOP2024) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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Abstract
I discuss the status of the computation of the two-loop QCD corrections to top-quark pair production associated with a jet at hadron colliders. This amplitude is a missing ingredient for next-to-next-to-leading order (NNLO) QCD predictions. I briefly present computational techniques to tackle the algebraic and analytic complexities of two-loop multi-scale amplitudes, in particular where massive propagators give rise to elliptic Feynman integrals. I then describe how a special function basis for the helicity amplitudes is obtained and present first numerical evaluations for the finite remainders of the $gg\to t\bar{t}g$ channel, after the infrared and ultraviolet poles have been identified analytically.
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