Updating V_us from kaon semileptonic decays
| dc.creator | Calderon, G. | |
| dc.creator | Castro, G. Lopez | |
| dc.date | 2001-11-22 | |
| dc.date.accessioned | 2026-07-07T13:13:10Z | |
| dc.date.available | 2026-07-07T13:13:10Z | |
| dc.description | We update the determination of |V_us| using semielectronic and semimuonic decays of K mesons. A modest improvement of 15% with respect to its present value is obtained for the error bar of this matrix element when we combine the four available semileptonic decays. The combined effects of long-distance radiative corrections and nonlinear terms in the vector form factors can decrease the value of |V_us| by up to 1%. Refined measurements of the decay widths and slope form factors in the semimuonic modes and a more accurate calculation of vector form factors at zero momentum transfer can push the determination of |V_us| at a few of percent level. | |
| dc.description | 19 pages, 2 figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0111272 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0111272 | |
| dc.identifier | Phys.Rev.D65:073032,2002 | |
| dc.identifier | doi:10.1103/PhysRevD.65.073032 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/229803 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Updating V_us from kaon semileptonic decays | |
| dc.type | text |