New Aspects of B -> pi pi, pi K and their Implications for Rare Decays
| dc.creator | Buras, Andrzej J. | |
| dc.creator | Fleischer, Robert | |
| dc.creator | Recksiegel, Stefan | |
| dc.creator | Schwab, Felix | |
| dc.date | 2005-12-02 | |
| dc.date | 2005-12-19 | |
| dc.date.accessioned | 2026-07-07T12:25:20Z | |
| dc.date.available | 2026-07-07T12:25:20Z | |
| dc.description | We analyse the B -> pi pi, pi K modes in the light of the most recent B-factory data, and obtain the following new results: (i) the B0 -> pi+ pi-, pi- K+ modes prefer gamma=(74+-6)deg, which - together with |V_ub/V_cb| - allows us to determine the ``true'' unitarity triangle and to search for CP-violating new-physics contributions to B0_d-\bar B0_d mixing; (ii) the B -> pi K puzzle reflected in particular by the low experimental value of the ratio R_n of the neutral B -> pi K rates persists and still favours new physics in the electroweak penguin sector with a new CP-violating phase phi ~ -90deg, although now also phi ~ +90deg can bring us rather close to the data; (iii) the mixing-induced B0 -> pi0 K_S CP asymmetry is a sensitive probe of the sign of this phase, and would currently favour phi ~ +90deg, as well as the direct CP asymmetry of B+- -> pi0 K+-, which suffers, however, from large hadronic uncertainties; (iv) we investigate the sensitivity of our B -> pi K analysis to large non-factorizable SU(3)-breaking effects and find that their impact is surprisingly small so that it is indeed exciting to speculate on new physics; (v) assuming that new physics enters through Z0 penguins, we study the interplay between B -> pi K and rare B, K decays and point out that the most recent B-factory constraints for the latter have interesting implications, bringing us to a few scenarios for the future evolution of the data, where also the mixing-induced CP violation in B0 -> pi0 K_S plays a prominent role. | |
| dc.description | Two references added, to appear in the European Physical Journal C | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0512032 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0512032 | |
| dc.identifier | Eur.Phys.J.C45:701-710,2006 | |
| dc.identifier | doi:10.1140/epjc/s2005-02469-4 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/214583 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | New Aspects of B -> pi pi, pi K and their Implications for Rare Decays | |
| dc.type | text |