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Test of the Conserved Vector Current Hypothesis in T=1/2 Mirror Transitions and New Determination of |Vud|

Abstract : 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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http://hal.in2p3.fr/in2p3-00354935
Contributor : Sandrine Guesnon <>
Submitted on : Wednesday, January 21, 2009 - 3:06:06 PM
Last modification on : Thursday, February 7, 2019 - 5:28:50 PM

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O. Naviliat-Cuncic, N. Severijns. Test of the Conserved Vector Current Hypothesis in T=1/2 Mirror Transitions and New Determination of |Vud|. Physical Review Letters, American Physical Society, 2009, 102, pp.142302. ⟨10.1103/PhysRevLett.102.142302⟩. ⟨in2p3-00354935⟩

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