Measurement of the neutron lifetime using a gravitational trap and a   low-temperature Fomblin coating
  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. 
A. Serebrov, V. Varlamov, A. Kharitonov, A. Fomin, Yu. Pokotilovski,   P. Geltenbort, J. Butterworth, I. Krasnoschekova, M. ...