Journal article
Three-loop helicity amplitudes for four-quark scattering in massless QCD
- Abstract:
- We compute the three-loop corrections to the helicity amplitudes for qq¯¯ → QQ¯¯¯¯ scattering in massless QCD. In the Lorentz decomposition of the scattering amplitude we avoid evanescent Lorentz structures and map the corresponding form factors directly to the physical helicity amplitudes. We reduce the amplitudes to master integrals and express them in terms of harmonic polylogarithms. The renormalised amplitudes exhibit infrared divergences of dipole and quadrupole type, as predicted by previous work on the infrared structure of multileg scattering amplitudes. We derive the finite remainders and present explicit results for all relevant partonic channels, both for equal and different quark flavours.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, 877.2KB, Terms of use)
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- Publisher copy:
- 10.1007/jhep10(2021)206
Authors
- Publisher:
- Scuola Internazionale Superiore di Studi Avanzati
- Journal:
- Journal of High Energy Physics More from this journal
- Volume:
- 2021
- Issue:
- 10
- Article number:
- 206
- Publication date:
- 2021-10-26
- Acceptance date:
- 2021-09-30
- DOI:
- EISSN:
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1029-8479
- ISSN:
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1126-6708
- Language:
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English
- Keywords:
- Pubs id:
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1209882
- Local pid:
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pubs:1209882
- Deposit date:
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2021-11-15
Terms of use
- Copyright holder:
- Caola et al.
- Copyright date:
- 2021
- Rights statement:
- © The Authors. Open Access: This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
- Licence:
- CC Attribution (CC BY)
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