Determination of |Vud| from nuclear mirror transitions

Details Determination of |Vud| from nuclear mirror transitions Determination of |Vud| from nuclear mirror transitions

2008-09-05

arxiv.org/abs/0809.0994v1

Phys.Rev.Lett.102:142302,2009

Physics

Nuclear Physics

Nuclear Experiment

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.102.142302

The Vud element of the Cabibbo-Kobayashi-Maskawa quark mixing matrix has traditionally been determined from the analysis of data in nuclear superallowed 0+ to 0+ transitions, neutron decay and pion beta decay. We show here that this element can independently be determined from nuclear mirror transitions. The extracted value, |Vud| = 0.9719 +- 0.0017, is at 1.2 combined standard deviations from the value obtained in superallowed 0+ to 0+ transitions and has a similar precision than the value obtained from neutron decay experiments. We discuss some prospects to improve its precision through experiments in nuclear mirror transitions.

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