Measurement of the Neutrino Asymmetry Parameter B in Neutron Decay

M. Schumann, T. Soldner, M. Deissenroth, F. Glück, J. Krempel, M. Kreuz, B. Märkisch, D. Mund, A. Petoukhov, and H. Abele
Phys. Rev. Lett. 99, 191803 – Published 8 November 2007
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Abstract

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.

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  • Received 14 June 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.191803

©2007 American Physical Society

Authors & Affiliations

M. Schumann1,*, T. Soldner2, M. Deissenroth1, F. Glück3,4, J. Krempel1,2, M. Kreuz2, B. Märkisch1, D. Mund1, A. Petoukhov2, and H. Abele1,†

  • 1Physikalisches Institut der Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany
  • 2Institut Laue-Langevin, B.P. 156, 38042 Grenoble Cedex 9, France
  • 3IKEP, Universität Karlsruhe (TH), Kaiserstr. 12, 76131 Karlsruhe, Germany
  • 4Research Institute for Nuclear and Particle Physics, POB 49, 1525 Budapest, Hungary

  • *marc.schumann@gmx.net
  • †abele@physi.uni-heidelberg.de

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Vol. 99, Iss. 19 — 9 November 2007

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