Biomedical subjects
D Dubbers
Publications and source records attributed to D Dubbers.
Is the unitarity of the quark-mixing CKM matrix violated in neutron beta-decay?
We report on a new measurement of neutron beta-decay asymmetry. From the result A(0) = -0.1189(7), we derive the ratio of the axial vector to the vector coupling constant lambda = g(A)/g(V) = -1.2739(19). When included in the world average for the neutron lifetime tau = 885.7(7) s, this gives the first element of the Cabibbo-Kobayashi-Maskawa (CKM) matrix V(ud). With this value and the Particle Data Group values for V(us) and V(ub), we find a deviation from the unitarity condition for the first row of the CKM matrix of Delta = 0.0083(28), which is 3.0 times the stated error.
3He Spin Echo: New Atomic Beam Technique for Probing Phenomena in the neV Range.
Explore the source record for details and available documents.
Geometric phases and hidden symmetries in simple resonators.
Explore the source record for details and available documents.
Spontaneous polarization of particles.
Explore the source record for details and available documents.
Pair decay of the 2.2-MeV excited state of the deuteron: Limits on light-particle emission.
Explore the source record for details and available documents.
Pulsed-beam neutron-lifetime measurement.
Explore the source record for details and available documents.
Manifestation of Berry's topological phase in neutron spin rotation.
Explore the source record for details and available documents.
Beta-decay asymmetry of the neutron and gA/gV.
Explore the source record for details and available documents.