Branching ratios for hyperon semi-invisible decays (hadronic ~10^{-5}, radiative <10^{-7}) are calculated with sizable one-loop corrections using effective Lagrangians.
Measurement of the neutron lifetime using a gravitational trap and a low-temperature Fomblin coating
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abstract
We present a new value for the neutron lifetime of 878.5 +- 0.7 stat. +- 0.3 syst. This result differs from the world average value (885.7 +- 0.8 s) by 6.5 standard deviations and by 5.6 standard deviations from the previous most precise result. However, this new value for the neutron lifetime together with a beta-asymmetry in neutron decay, Ao, of -0.1189(7) is in a good agreement with the Standard Model.
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Semi-invisible Hyperon Decays in the Effective Lagrangian Approach
Branching ratios for hyperon semi-invisible decays (hadronic ~10^{-5}, radiative <10^{-7}) are calculated with sizable one-loop corrections using effective Lagrangians.