The branching fraction of B s 0 → K 0 K ¯ 0 $$ {B}_s^0\to {K}^0{\overline{K}}^0 $$ : three puzzles
Abstract The branching fraction of the B s → K 0 K ¯ 0 $$ {B}_s\to {K}^0{\overline{K}}^0 $$ decay has been recently measured by the LHCb and Belle experiments. We study the consistency of the measured value with three relations to other decay rates and CP asymmetries which follow from the Standard M...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-02-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP02(2023)113 |
| _version_ | 1797779159286546432 |
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| author | Yasmine Amhis Yuval Grossman Yosef Nir |
| author_facet | Yasmine Amhis Yuval Grossman Yosef Nir |
| author_sort | Yasmine Amhis |
| collection | DOAJ |
| description | Abstract The branching fraction of the B s → K 0 K ¯ 0 $$ {B}_s\to {K}^0{\overline{K}}^0 $$ decay has been recently measured by the LHCb and Belle experiments. We study the consistency of the measured value with three relations to other decay rates and CP asymmetries which follow from the Standard Model, and from the approximate flavor SU(3) symmetry of the strong interactions. We find that each of these relations is violated at a level of above 3σ. We argue that various subleading effects — rescattering, electroweak penguins and SU(3) breaking — if larger than theoretically expected, can account for some of these puzzles, but not for all of them simultaneously. |
| first_indexed | 2024-03-12T23:26:36Z |
| format | Article |
| id | doaj.art-de83b08ca8364b1686d6628a2ef35ca1 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-03-12T23:26:36Z |
| publishDate | 2023-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-de83b08ca8364b1686d6628a2ef35ca12023-07-16T11:06:22ZengSpringerOpenJournal of High Energy Physics1029-84792023-02-012023211410.1007/JHEP02(2023)113The branching fraction of B s 0 → K 0 K ¯ 0 $$ {B}_s^0\to {K}^0{\overline{K}}^0 $$ : three puzzlesYasmine Amhis0Yuval Grossman1Yosef Nir2Université Paris-Saclay, CNRS/IN2P3, IJCLabLEPP, Department of Physics, Cornell UniversityDepartment of Particle Physics and Astrophysics, Weizmann Institute of ScienceAbstract The branching fraction of the B s → K 0 K ¯ 0 $$ {B}_s\to {K}^0{\overline{K}}^0 $$ decay has been recently measured by the LHCb and Belle experiments. We study the consistency of the measured value with three relations to other decay rates and CP asymmetries which follow from the Standard Model, and from the approximate flavor SU(3) symmetry of the strong interactions. We find that each of these relations is violated at a level of above 3σ. We argue that various subleading effects — rescattering, electroweak penguins and SU(3) breaking — if larger than theoretically expected, can account for some of these puzzles, but not for all of them simultaneously.https://doi.org/10.1007/JHEP02(2023)113Bottom QuarksCP ViolationFlavour Symmetries |
| spellingShingle | Yasmine Amhis Yuval Grossman Yosef Nir The branching fraction of B s 0 → K 0 K ¯ 0 $$ {B}_s^0\to {K}^0{\overline{K}}^0 $$ : three puzzles Journal of High Energy Physics Bottom Quarks CP Violation Flavour Symmetries |
| title | The branching fraction of B s 0 → K 0 K ¯ 0 $$ {B}_s^0\to {K}^0{\overline{K}}^0 $$ : three puzzles |
| title_full | The branching fraction of B s 0 → K 0 K ¯ 0 $$ {B}_s^0\to {K}^0{\overline{K}}^0 $$ : three puzzles |
| title_fullStr | The branching fraction of B s 0 → K 0 K ¯ 0 $$ {B}_s^0\to {K}^0{\overline{K}}^0 $$ : three puzzles |
| title_full_unstemmed | The branching fraction of B s 0 → K 0 K ¯ 0 $$ {B}_s^0\to {K}^0{\overline{K}}^0 $$ : three puzzles |
| title_short | The branching fraction of B s 0 → K 0 K ¯ 0 $$ {B}_s^0\to {K}^0{\overline{K}}^0 $$ : three puzzles |
| title_sort | branching fraction of b s 0 k 0 k ¯ 0 b s 0 to k 0 overline k 0 three puzzles |
| topic | Bottom Quarks CP Violation Flavour Symmetries |
| url | https://doi.org/10.1007/JHEP02(2023)113 |
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