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SUMMARY:Superallowed Fermi decays: precise T1/2 and branching ratios measu
 rements
DTSTART;VALUE=DATE-TIME:20110221T152000Z
DTEND;VALUE=DATE-TIME:20110221T160000Z
DTSTAMP;VALUE=DATE-TIME:20261011T084258Z
UID:indico-contribution-6163@indico.ific.uv.es
DESCRIPTION:Speakers: Jérôme Giovinazzo (CENBG / IN2P3 / CNRS)\nThrough 
 the studies of Fermi transitions between 0+ analog states with T = 1 (su
 perallowed transitions)\, nuclear physics provides a valuable test of the 
 Standard Model of particle physics. These transitions depend only on the v
 ector part of the weak interaction\, and according to the conserved vector
  current (CVC) hypothesis\, their strength Ft is a constant. Then this val
 ue is used to determine the Vud term in the CKM quark mixing matrix\, that
  should be unitary.\nThe constant Ft strength determination requires very 
 high precision measurement of the decay energy QEC (related to masses) and
  of the partial half-life of the transition (parent nucleus half-life T1/2
  and branching ratio BR)\, but it also requires some theoretical correctio
 ns of the experimental values. Then\, beside the search for “new physics
 ” if deviations from the standard model are observed\, such studies are 
 a very sensitive test of the theoretical descriptions used to calculate th
 ose corrections.\nIn this presentation\, I will give a general view of the
  landscape of nuclei of interest for those studies\, with a focus on recen
 t experimental results concerning the T1/2 and BR measurements that we per
 formed at Jyväskylä university and ISOLDE at CERN : 26Si\, 30S\, 42Ti\, 
 38Ca and 62Ga. These results have to be compared with other measurements t
 hat have been performed worldwide\, showing the strong activity in this fi
 eld. Finally\, expectations and limitations for further studies will be ad
 dressed.\n\nhttps://indico.ific.uv.es/event/349/contributions/6163/
LOCATION:Colegio Rector Peset
URL:https://indico.ific.uv.es/event/349/contributions/6163/
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