Isospin-symmetry-breaking effects in nuclear β decay

Details Isospin-symmetry-breaking effects in nuclear β decay Isospin-symmetry-breaking effects in nuclear β decay

Mar 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aps..aprx12002m&link_type=abstract

American Physical Society, APS April Meeting 2012, March 31-Apr 3, 2012, abstract #X12.002

Physics

Scientific paper

Precisely measured ft values of J^π=0^+ 0^+ β decays of isospin T=1 nuclei are used to set stringent limits on scalar and right-handed interactions, verify the conserved vector current hypothesis at the ˜10-4 level, and provide the most precise measurement of Vud, the up-down element of the Cabibbo-Kobayashi-Maskawa quark-mixing matrix. In order to utilize the measured ft values for these purposes, one must first apply theoretical corrections for isospin-symmetry-breaking and radiative effects. In recent years, the nuclear-structure-dependent isospin-symmetry-breaking calculations have been placed under intense scrutiny; concurrently, experimental work has measured these corrections in cases where they are relatively large. This talk will review the effects of isospin-symmetry breaking in superallowed transitions and discuss recent results aimed at testing the validity of the corrections that are applied.

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