B ¯ → D ¯ D $$ \overline{B}\to \overline{D}D $$ decays and the extraction of f d /f u at hadron colliders
Abstract We perform a detailed model-independent phenomenological analysis of B ¯ → D ¯ D $$ \overline{B}\to \overline{D}D $$ decays. Employing an SU(3) F analysis including symmetry-breaking contributions together with a conservative power counting for various suppression effects, we obtain updated...
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SpringerOpen
2024-01-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP01(2024)191 |
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| author | Jonathan Davies Martin Jung Stefan Schacht |
| author_facet | Jonathan Davies Martin Jung Stefan Schacht |
| author_sort | Jonathan Davies |
| collection | DOAJ |
| description | Abstract We perform a detailed model-independent phenomenological analysis of B ¯ → D ¯ D $$ \overline{B}\to \overline{D}D $$ decays. Employing an SU(3) F analysis including symmetry-breaking contributions together with a conservative power counting for various suppression effects, we obtain updated Standard Model predictions for all branching fractions and CP asymmetries from a fit to the available experimental data, testable at Belle II and the LHC experiments. These results include all relevant suppressed contributions, thereby providing upper limits on subleading Standard Model (SM) effects like “penguin pollution”, enabling searches for physics beyond the SM. Importantly, allowing in the same fit for the production fractions of charged and neutral B mesons to be different, we find f d /f u = 0.86 ± 0.05, which is 2.5σ away from unity, which, if confirmed, would have important phenomenological consequences. |
| format | Article |
| id | doaj-art-0b98dec1a5da4cdc8c75c67f5d72e1f2 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-0b98dec1a5da4cdc8c75c67f5d72e1f22025-02-09T12:08:57ZengSpringerOpenJournal of High Energy Physics1029-84792024-01-012024113410.1007/JHEP01(2024)191B ¯ → D ¯ D $$ \overline{B}\to \overline{D}D $$ decays and the extraction of f d /f u at hadron collidersJonathan Davies0Martin Jung1Stefan Schacht2Department of Physics and Astronomy, University of ManchesterDipartimento di Fisica, Università di Torino & INFN, Sezione di TorinoDepartment of Physics and Astronomy, University of ManchesterAbstract We perform a detailed model-independent phenomenological analysis of B ¯ → D ¯ D $$ \overline{B}\to \overline{D}D $$ decays. Employing an SU(3) F analysis including symmetry-breaking contributions together with a conservative power counting for various suppression effects, we obtain updated Standard Model predictions for all branching fractions and CP asymmetries from a fit to the available experimental data, testable at Belle II and the LHC experiments. These results include all relevant suppressed contributions, thereby providing upper limits on subleading Standard Model (SM) effects like “penguin pollution”, enabling searches for physics beyond the SM. Importantly, allowing in the same fit for the production fractions of charged and neutral B mesons to be different, we find f d /f u = 0.86 ± 0.05, which is 2.5σ away from unity, which, if confirmed, would have important phenomenological consequences.https://doi.org/10.1007/JHEP01(2024)191Bottom QuarksCP Violation |
| spellingShingle | Jonathan Davies Martin Jung Stefan Schacht B ¯ → D ¯ D $$ \overline{B}\to \overline{D}D $$ decays and the extraction of f d /f u at hadron colliders Journal of High Energy Physics Bottom Quarks CP Violation |
| title | B ¯ → D ¯ D $$ \overline{B}\to \overline{D}D $$ decays and the extraction of f d /f u at hadron colliders |
| title_full | B ¯ → D ¯ D $$ \overline{B}\to \overline{D}D $$ decays and the extraction of f d /f u at hadron colliders |
| title_fullStr | B ¯ → D ¯ D $$ \overline{B}\to \overline{D}D $$ decays and the extraction of f d /f u at hadron colliders |
| title_full_unstemmed | B ¯ → D ¯ D $$ \overline{B}\to \overline{D}D $$ decays and the extraction of f d /f u at hadron colliders |
| title_short | B ¯ → D ¯ D $$ \overline{B}\to \overline{D}D $$ decays and the extraction of f d /f u at hadron colliders |
| title_sort | b ¯ d ¯ d overline b to overline d d decays and the extraction of f d f u at hadron colliders |
| topic | Bottom Quarks CP Violation |
| url | https://doi.org/10.1007/JHEP01(2024)191 |
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