Three-loop nonsinglet matching coefficients for heavy quark currents
Abstract:
We compute the matching coefficients between QCD and nonrelativistic QCD for external vector, axial-vector, scalar, and pseudoscalar currents up to three-loop order. We concentrate on the nonsinglet contributions and present precise numerical results with an accuracy of about ten digits. For the vector current the results from Marquard et al. [Phys. Rev. D 89, 034027 (2014)] are confirmed, increasing the accuracy by several orders of magnitude.
| Zugehörige Institution(en) am KIT | Institut für Astroteilchenphysik (IAP) Institut für Theoretische Teilchenphysik (TTP) |
| Publikationstyp | Zeitschriftenaufsatz |
| Publikationsmonat/-jahr | 06.2022 |
| Sprache | Englisch |
| Identifikator | ISSN: 2470-0010, 2470-0029 KITopen-ID: 1000148898 |
| HGF-Programm | 51.11.01 (POF IV, LK 01) Teilchenphysik |
| Erschienen in | Physical Review D |
| Verlag | American Physical Society (APS) |
| Band | 105 |
| Heft | 11 |
| Seiten | Art.-Nr. 114007 |
| Vorab online veröffentlicht am | 08.06.2022 |
| Nachgewiesen in | Scopus Web of Science Dimensions |