The B -> pi pi,pi K Puzzles in the Light of New Data: Implications for the Standard Model, New Physics and Rare Decays
| dc.creator | Buras, Andrzej J. | |
| dc.creator | Fleischer, Robert | |
| dc.creator | Recksiegel, Stefan | |
| dc.creator | Schwab, Felix | |
| dc.date | 2004-10-29 | |
| dc.date | 2004-11-08 | |
| dc.date.accessioned | 2026-07-07T03:53:48Z | |
| dc.date.available | 2026-07-07T03:53:48Z | |
| dc.description | Recently, we developed a strategy to analyse the B -> pi pi,pi K data. We found that the B -> pi pi measurements can be accommodated in the Standard Model (SM) through large non-factorizable effects. On the other hand, our analysis of the ratios R_c and R_n of the CP-averaged branching ratios of the charged and neutral B -> pi K modes, respectively, suggested new physics (NP) in the electroweak penguin sector, which may have a powerful interplay with rare decays. In this paper, we confront our strategy with recent experimental developments, addressing also the direct CP violation in B_d -> pi^-+ K^+-, which is now an established effect, the relation to its counterpart in B^+- -> pi^0 K^+-, and the first results for the direct CP asymmetry of B_d -> pi^0 pi^0 that turn out to be in agreement with our prediction. We obtain hadronic B -> pi pi,pi K parameters which are almost unchanged and arrive at an allowed region for the unitarity triangle in perfect accordance with the SM. The ``B -> pi K puzzle'' persists, and can still be explained through NP, as in our previous analysis. In fact, the recently observed shifts in the experimental values of R_c and R_n have been predicted in our framework on the basis of constraints from rare decays. Conversely, we obtain a moderate deviation of the ratio R of the CP-averaged B_d -> pi^-+ K^+- and B^+- -> pi^+- K rates from the current experimental value. However, using the emerging signals for B^+- -> K^+- K modes, this effect can be attributed to certain hadronic effects, which have a minor impact on R_c and do not at all affect R_n. Our results for rare decays remain unchanged. | |
| dc.description | 32 pages, 5 figures, references added, typos removed, table summarizing results added in conclusions | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0410407 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0410407 | |
| dc.identifier | Acta Phys.Polon. B36 (2005) 2015-2050 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/43984 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | The B -> pi pi,pi K Puzzles in the Light of New Data: Implications for the Standard Model, New Physics and Rare Decays | |
| dc.type | text |