Measurement of the neutrino asymmetry parameter B in neutron decay.
A new measurement of the neutrino asymmetry parameter B in neutron decay, the angular correlation between neutron spin and antineutrino momentum, is presented. The result, B=0.9802(50), 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.
Schumann
M
M
Physikalisches Institut der Universität Heidelberg, Philosophenweg 12, 69120, Heidelberg, Germany. marc.schumann@gmx.net
Soldner
T
T
Deissenroth
M
M
Glück
F
F
Krempel
J
J
Kreuz
M
M
Märkisch
B
B
Mund
D
D
Petoukhov
A
A
Abele
H
H