Is the Unitarity Triangle Right?
| dc.creator | Harrison, P. F. | |
| dc.creator | Roythorne, D. R. J. | |
| dc.creator | Scott, W. G. | |
| dc.date | 2009-04-20 | |
| dc.date.accessioned | 2026-07-07T13:05:57Z | |
| dc.date.available | 2026-07-07T13:05:57Z | |
| dc.description | The latest fits to the CKM matrix indicate that alpha=(90.7+4.5-2.9) degrees. The proximity of alpha to a right-angle raises the question: is it merely accidental or is it due to some physics beyond the Standard Model? In the framework of our recently-proposed flavour permutation symmetry, we consider the similarities between the quark and lepton mixing matrices, V and U, arguing that the relative smallness of one element in each suggests common constraints. These constraints link the smallness of V_ub and U_e3 with each other, and with the approximate mu-tau symmetry observed in leptonic mixing, together with a prediction of a large Dirac CP phase in both the quark and lepton sectors. In the quark case, we predict alpha=(89.0\pm 0.2) degrees, in agreement with data and suggesting that the unitarity triangle is in fact very nearly, but not exactly right. | |
| dc.description | Talk given at the International Conference on Particles And Nuclei (PANIC08), Eilat, Israel, 13th November 2008. 4 pages | |
| dc.identifier | https://arxiv.org/abs/0904.3014 | |
| dc.identifier | http://arxiv.org/abs/0904.3014 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/227658 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Is the Unitarity Triangle Right? | |
| dc.type | text |