Greub, Christoph; Asatrian, Hrachia M.; Saturnino, Francesco; Wiegand, Christoph (2023). Specific three-loop contributions to b → sγ associated with the current-current operators. Journal of High Energy Physics, 2023(5) Springer 10.1007/JHEP05(2023)201
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We work out a specific class of three-loop diagrams (of order α2s) contributing
to the decay amplitude for b → sγ associated with the current-current operators O1 and O2
at the physical value of the charm-quark mass mc. For many of the considered diagrams we
were able to solve the master integrals using differential equations in the canonical form.
For some diagrams we did not find a transformation to canonical form and therefore calculated the corresponding master integrals directly as an expansion around z = m2
c/m2b = 0, retaining power terms up to z10 and keeping the accompanying log(z) terms to all powers. The results for the sum of all considered diagrams are given in tabular form, while
contributions of individual diagrams (or combinations thereof) are given in electronic form.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Institute of Theoretical Physics 10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) |
UniBE Contributor: |
Greub, Christoph, Saturnino, Francesco, Wiegand, Peter Christoph |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1029-8479 |
Publisher: |
Springer |
Language: |
English |
Submitter: |
Franziska Stämpfli |
Date Deposited: |
04 Dec 2023 09:29 |
Last Modified: |
04 Dec 2023 09:29 |
Publisher DOI: |
10.1007/JHEP05(2023)201 |
ArXiv ID: |
2303.01714 |
BORIS DOI: |
10.48350/189689 |
URI: |
https://boris.unibe.ch/id/eprint/189689 |
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