title: Test of the conserved vector current hypothesis in T=1/2 mirror transitions and new determination of |V ud|.
abstract: The V{ud} element of the Cabibbo-Kobayashi-Maskawa quark mixing matrix has traditionally been determined from the analysis of data in nuclear superallowed 0;{+}-->0;{+} transitions, neutron decay, and pion beta decay. After providing a new test of the conserved vector current hypothesis, we present here a new independent determination of |V{ud}| from a set of five T=1/2 nuclear mirror transitions. The extracted value, |V{ud}|=0.9719+/-0.0017, is at 1.2 combined standard deviations from the value obtained from superallowed 0;{+}-->0;{+} transitions and has a precision comparable to the value obtained from neutron decay experiments.
authors.affiliation: LPC-Caen, ENSICAEN, Université de Caen Basse-Normandie, CNRS/IN2P3-ENSI, Caen, France.
authors.forename: O
authors.initials: O
authors.lastname: Naviliat-Cuncic
authors.forename: N
authors.initials: N
authors.lastname: Severijns