The current evaluation of ${V}_{ud}$
| Pub type: | Inproceedings |
| Citation: | hardy:CIPANP2015 |
| Status: | Published |
| Journal: | eConf |
| Booktitle: | 12th Conference on the Intersections of Particle and Nuclear Physics (CIPANP 2015) |
| Volume: | C15-05-19 |
| Year: | 2015 |
| Month: | September |
| Pages: | 60 |
| Location: | Vail, Colorado |
| Note: | May 19-24, 2015 |
| URL: | https://arxiv.org/abs/1509.047... |
| Abstract: | The Vud element of the Cabibbo-Kobayashi-Maskawa matrix can be determined from several different experimental approaches: either 0+-to-0+ superallowed nuclear beta decays, neutron decay, nuclear mirror decays, or pion beta decay. Currently all give consistent results but, because the nuclear superallowed value has an uncertainty at least a factor of seven less than all other results, it dominates the result. A new survey of world superallowed-decay data establishes the Ft values of 14 separate superallowed transitions to a precision of order 0.1% or better; and all 14 are statistically consistent with one another. This very robust data set yields the result Vud = 0.97417(21), the value we recommend. |
| Month_val: | 9 |
| Sig contrib: | J. C. Hardy, I. S. Towner |
| Authors: | |
| Added by: | [DGM] |
| Total mark: | 0 |
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