Search for a Short-Lived Neutral Particle Produced in Nuclear Decay

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14 July 1986

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 57 (2) , 178-181
https://doi.org/10.1103/physrevlett.57.178

Abstract

We report on a search for a short-lived neutral particle

φ

produced in the decay of the 9.17-MeV

J^{π} = 2^{+}

state in

{}^{14}N

. The experiment is sensitive to decays into an

e^{+} e^{-}

pair with

τ_{φ} ≲ 10^{- 11}

s. For

m_{φ} = 1.7

MeV we place a limit on the branching ratio of

\frac{Γ_{φ}}{Γ_{γ}} <~ 4 \times 10^{- 4}

at the 90% confidence level.

Keywords

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