A New Limit on Time-Reversal Violation in Beta Decay

Abstract

We report the results of an improved determination of the triple correlation $DP\cdot (p_e\times p_{\nu })$ 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 ${\varphi }_{AV}=180.013^{\circ }\pm 0.028^{\circ }$ (68 % confidence level). This result represents the most sensitive measurement of D in beta decay.

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

References in corpus (1)

• Measurement of the Transverse Polarization of Electrons Emitted in Free Neutron Decay

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