Positron-Neutrino Correlation in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mn>0</mml:mn></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mo>→</mml:mo><mml:mrow><mml:msup><mml:mrow><mml:mn>0</mml:mn></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>Decay of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi/></mml:mrow><mml:mrow><mml:mn>32</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi>Ar</mml:mi></mml:math>

1999125 citationsJournal Article

Authors

E. G. Adelberger · University of Washington

C. Ortiz · University of Notre Dame

A. Garcı́a · University of Notre Dame

H. E. Swanson · University of Washington

M. Beck · University of Washington

O. Tengblad · Instituto de Estructura de la Materia

M. J. G. Borge ·

Abstract

The positron-neutrino correlation in the ${0}^{+}\ensuremath{\rightarrow}{0}^{+}$ $\ensuremath{\beta}$ decay of ${}^{32}\mathrm{Ar}$ was measured at ISOLDE by analyzing the effect of lepton recoil on the shape of the narrow proton group following the superallowed decay. Our result is consistent with the standard model prediction. For vanishing Fierz interference we find $a\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.9989\ifmmode\pm\else\textpm\fi{}0.0052\ifmmode\pm\else\textpm\fi{}0.0039$, which yields improved constraints on scalar weak interactions.

Topics & Keywords

Particle physics theoretical and experimental studies Nuclear physics research studies Neutrino Physics Research

Publication Details

Published in: Physical Review Letters

Volume 83, Issue 7, pp. 1299-1302

DOI: 10.1103/physrevlett.83.1299

Field-Weighted Citation Impact: 10.70

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Publication Details