Experimental Status of Vud from Neutron Decay

Details Experimental Status of Vud from Neutron Decay Experimental Status of Vud from Neutron Decay

2011-07-18

arxiv.org/abs/1107.3422v2

Physics

Nuclear Physics

Nuclear Experiment

Proceedings of CKM2010, the 6th International Workshop on the CKM Unitarity Triangle, University of Warwick, UK, 6-10 Septembe

Scientific paper

The matrix element Vud of the CKM matrix can be determined by two independent measurements on neutron decay: the neutron lifetime tau and the ratio of coupling constants lambda, which is most precisely determined by measurements of the beta asymmetry angular correlation coefficient A. We present recent progress on the determination of these values and derive a world average of Vud = 0.9743 (2)RC (8)tau (12)lambda.

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