title: Microscopic calculations of isospin-breaking corrections to superallowed beta decay.
abstract: The superallowed β-decay rates that provide stringent constraints on physics beyond the standard model of particle physics are affected by nuclear structure effects through isospin-breaking corrections. The self-consistent isospin- and angular-momentum-projected nuclear density functional theory is used for the first time to compute those corrections for a number of Fermi transitions in nuclei from A=10 to A=74. The resulting leading element of the Cabibbo-Kobayashi-Maskawa matrix, |V(ud)|=0.97447(23), agrees well with the recent result of Towner and Hardy [Phys. Rev. C 77, 025501 (2008)].
authors.affiliation: Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, ul. Hoża 69, PL-00-681 Warsaw, Poland.
authors.forename: W
authors.initials: W
authors.lastname: Satuła
authors.forename: J
authors.initials: J
authors.lastname: Dobaczewski
authors.forename: W
authors.initials: W
authors.lastname: Nazarewicz
authors.forename: M
authors.initials: M
authors.lastname: Rafalski