A New Limit on Time-Reversal Violation in Beta Decay

H. P. Mumm; T. E. Chupp; R. L. Cooper; K. P. Coulter; S. J. Freedman; B. K. Fujikawa; A. Garcia; G. L. Jones; J. S. Nico; A. K. Thompson; C. A. Trull; J. F. Wilkerson; F. E. Wietfeldt

doi:10.1103/PhysRevLett.107.102301

A New Limit on Time-Reversal Violation in Beta Decay

Nuclear Experiment 2015-05-27 v2

Authors: H. P. Mumm , T. E. Chupp , R. L. Cooper , K. P. Coulter , S. J. Freedman , B. K. Fujikawa , A. Garcia , G. L. Jones , J. S. Nico , A. K. Thompson , C. A. Trull , J. F. Wilkerson , F. E. Wietfeldt

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Abstract

We report the results of an improved determination of the triple correlation $D P \cdot(p_{e}\times p_{\nu})$ that can be used to limit possible time-reversal invariance in the beta decay of polarized neutrons and constrain extensions to the Standard Model. Our result is $D=(-0.96\pm 1.89 (stat)\pm 1.01 (sys))\times 10^{-4}$ . The corresponding phase between g_A and g_V is $\phi_{AV} = 180.013^\circ\pm0.028^\circ$ (68 % confidence level). This result represents the most sensitive measurement of D in beta decay.

Keywords

time-reversal violation beta decay triple correlation polarized neutrons Standard Model

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@article{arxiv.1104.2778,
  title  = {A New Limit on Time-Reversal Violation in Beta Decay},
  author = {H. P. Mumm and T. E. Chupp and R. L. Cooper and K. P. Coulter and S. J. Freedman and B. K. Fujikawa and A. Garcia and G. L. Jones and J. S. Nico and A. K. Thompson and C. A. Trull and J. F. Wilkerson and F. E. Wietfeldt},
  journal= {arXiv preprint arXiv:1104.2778},
  year   = {2015}
}

Comments

4 pages, 4 figures Fixed typos, a Ref., and Fig. 1

A New Limit on Time-Reversal Violation in Beta Decay

Abstract

Keywords

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