Abstract
A new measurement of the neutrino asymmetry parameter in neutron decay, the angular correlation between neutron spin and antineutrino momentum, is presented. The result, , confirms earlier measurements but features considerably smaller corrections. It agrees with the standard model expectation and permits updated tests on “new physics” in neutron decay.
- Received 14 June 2007
DOI:https://doi.org/10.1103/PhysRevLett.99.191803
©2007 American Physical Society