A solution to B --> pi pi puzzle and B --> K K
| dc.creator | Baek, Seungwon | |
| dc.date | 2007-07-19 | |
| dc.date | 2007-07-26 | |
| dc.date.accessioned | 2026-07-07T11:41:31Z | |
| dc.date.available | 2026-07-07T11:41:31Z | |
| dc.description | The large ratio of color-suppressed tree amplitude to color-allowed one in $B \to ππ$ decays is difficult to understand within the Standard Model, which is known as the "$B \to ππ$ puzzle". The two tree diagrams contain the up- and charm-quark component of penguin amplitude, $P_{uc}$, which cannot be separated by measuring $B \to ππ$ decays alone. We show that the measurements of the branching ratio and direct CP asymmetry of $B^+ \to K^+ \bar{K^0}$ decay enable one to disentangle the $P_{uc}$ with two-fold ambiguity. One of the two degenerate solutions of the $P_{uc}$ can solve the $B \to ππ$ puzzle by giving $|C/T|\sim 0.3$ which is consistent with the expectation in the Standard Model. We also show that the two solutions can be discriminated by the measurement of the indirect CP-asymmetry of $B^0 \to K^0 \ol{K^0}$. We point out that if the $B \to ππ$ puzzle is solved in this way, the corresponding puzzle in $B \to πK$ decays should have a different origin. | |
| dc.description | 12 pages, 2 figures, minor changes, references added | |
| dc.identifier | https://arxiv.org/abs/0707.2838 | |
| dc.identifier | http://arxiv.org/abs/0707.2838 | |
| dc.identifier | Phys.Lett.B659:265-269,2008 | |
| dc.identifier | doi:10.1016/j.physletb.2007.11.029 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/200561 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | A solution to B --> pi pi puzzle and B --> K K | |
| dc.type | text |