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$\mathcal{O}(\alpha_s^3)$ calculations for the inclusive determination of $|V_{cb}|$


Schönwald, Kay (2023). $\mathcal{O}(\alpha_s^3)$ calculations for the inclusive determination of $|V_{cb}|$. In: 11th International Workshop on the CKM Unitarity Triangle, The University of Melbourne, Australia, 22 November 2021 - 26 November 2021, SISSA.

Abstract

For the determination of the Cabbibo-Kobayashi-Maskawa matrix element |Vcb| from inclusive data precise knowledge of the semileptonic b→c decay rate is necessary. Since this observable has a bad convergence behavior when the heavy quark masses are expressed in the on-shell or MS¯¯¯¯¯¯¯ scheme the latest determinations have been obtained in the so called kinetic mass scheme. The relation between the different schemes needs to be known to high precision as well. In this proceedings we present our recent calculations which push the precision of both ingredients to O(α3s). The results can be used to improve the inclusive determination of |Vcb|.

Abstract

For the determination of the Cabbibo-Kobayashi-Maskawa matrix element |Vcb| from inclusive data precise knowledge of the semileptonic b→c decay rate is necessary. Since this observable has a bad convergence behavior when the heavy quark masses are expressed in the on-shell or MS¯¯¯¯¯¯¯ scheme the latest determinations have been obtained in the so called kinetic mass scheme. The relation between the different schemes needs to be known to high precision as well. In this proceedings we present our recent calculations which push the precision of both ingredients to O(α3s). The results can be used to improve the inclusive determination of |Vcb|.

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Item Type:Conference or Workshop Item (Paper), not_refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Event End Date:26 November 2021
Deposited On:05 Jan 2024 12:21
Last Modified:09 Jan 2024 07:50
Publisher:SISSA
Series Name:Proceedings of science
ISSN:1824-8039
OA Status:Hybrid
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.22323/1.411.0054
Official URL:https://pos.sissa.it/411/054
  • Content: Published Version
  • Language: English
  • Licence: Creative Commons: Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)