Padé approach to top-quark mass effects in gluon fusion amplitudes
Abstract:
Gluon fusion processes like single and double Higgs production exhibit slow convergence and pose severe computational challenges. We show how the top-quark mass dependence of the virtual amplitudes can be reconstructed with a conformal mapping and Padé approximants based on the expansion in the inverse top-quark mass and the non-analytic terms in the expansion around the top threshold. The method is then applied at two- and three-loop order.
| Zugehörige Institution(en) am KIT | Institut für Theoretische Teilchenphysik (TTP) |
| Publikationstyp | Zeitschriftenaufsatz |
| Publikationsjahr | 2020 |
| Sprache | Englisch |
| Identifikator | ISSN: 1824-8039 KITopen-ID: 1000118487 |
| Erschienen in | Proceedings of Science / International School for Advanced Studies |
| Verlag | Scuola Internazionale Superiore di Studi Avanzati (SISSA) |
| Band | 375 |
| Seiten | Article: 079 |
| Vorab online veröffentlicht am | 19.12.2019 |
| Nachgewiesen in | Scopus OpenAlex Dimensions |