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Limits on nonstandard weak currents from the positron decays of O-14 and C-10

1990
4 pages
Published in:
  • Phys.Rev.Lett. 65 (1990) 3249-3252
DOI:
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Abstract: (APS)
The relative polarization of positrons emitted in pure Fermi (14O) and Gamow-Teller (10C) decays has been measured using a new technique based on time-resolved positronium decay. The result PGT/PF=0.9996±0.0037 provides constraints on possible right-handed and scalar-tensor current admixtures to the weak interaction of -4<ζδ×104<7 and ‖(CS/CV)-(CT/CA)‖=(1±9)×10−3 (90% C.L.), respectively.
  • nucleus: decay
  • decay: nucleus
  • carbon: nuclide
  • oxygen: nuclide
  • positron: polarization
  • polarization: positron
  • weak interaction
  • current: right-handed
  • current: scalar
  • current: tensor
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