J. David Bowman, L. J. Broussard, S. M. Clayton, M. S. Dewey, N. Fomin, K. B. Grammer, G. L. Greene, P. R. Huffman, A. T. Holley, G. L. Jones, C. -Y. Liu, M. Makela, M. P. Mendenhall, C. L. Morris, J. Mulholland, K. M. Nollett, R. W. Pattie, Jr., S. Penttila, M. Ramsey-Musolf, D. J. Salvat, A. Saunders, S. J. Seestrom, W. M. Snow, A. Steyerl, F. E. Wietfeldt, A. R. Young, A. T. Yue
Published 2014-10-20Version 1
We present the status of current US experimental efforts to measure the lifetime of the free neutron by the "beam" and "bottle" methods. BBN nucleosynthesis models require accurate measurements with 1 second uncertainties, which are currently feasible. For tests of physics beyond the standard model, future efforts will need to achieve uncertainties well below 1 second. We outline paths achieve both.
Measurement of the Free Neutron Lifetime in a Magneto-Gravitational Trap with In Situ Detection
Determination of the spins and parities for the 0$_{4}^{+}$ and 0$_{5}^{+}$ states in $^{100}$Zr
Measurement of the Free Neutron Lifetime using the Neutron Spectrometer on NASA's Lunar Prospector Mission
![QR code for arXiv:1410.5311 [nucl-ex]](http://oss.arxitics.com/images/favicon.svg)