U-Spin Tests of the Standard Model and New Physics
| dc.creator | Nagashima, Makiko | |
| dc.creator | Szynkman, Alejandro | |
| dc.creator | London, David | |
| dc.date | 2007-01-24 | |
| dc.date | 2008-04-25 | |
| dc.date.accessioned | 2026-07-07T11:58:59Z | |
| dc.date.available | 2026-07-07T11:58:59Z | |
| dc.description | Within the standard model, a relation involving branching ratios and direct CP asymmetries holds for the B-decay pairs that are related by U-spin. The violation of this relation indicates new physics (NP). In this paper, we assume that the NP affects only the Delta S = 1 decays, and show that the NP operators are generally the same as those appearing in B -> pi K decays. The fit to the latest B -> pi K data shows that only one NP operator is sizeable. As a consequence, the relation is expected to be violated for only one decay pair: Bd -> K0 pi0 and Bs -> Kbar0 pi0. | |
| dc.description | 12 pages, latex, no figures. References changed to follow MPL guidelines; info added about U-spin breaking and small NP strong phases; discussion added about final-state pi-K rescattering; analysis and conclusions unaltered | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0701199 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0701199 | |
| dc.identifier | Mod.Phys.Lett.A23:1175-1185,2008 | |
| dc.identifier | doi:10.1142/S0217732308027023 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/206413 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | U-Spin Tests of the Standard Model and New Physics | |
| dc.type | text |