Search for long-lived neutral bosons in orthopositronium decay

S. Asai; S. Orito; Koji Yoshimura; T. Haga

doi:10.1103/PhysRevLett.66.2440

Search for long-lived neutral bosons in orthopositronium decay

S. Asai, S. Orito, Koji Yoshimura, T. Haga

Research output: Contribution to journal › Article

28 Citations (Scopus)

Abstract

We have searched for orthoposition decay into plus a feebly interacting boson X0, by looking for a narrow peak in the energy spectrum of single taken under the condition of no additional detected in a hermetic photon detector. No evidence of such decay is observed, resulting in a new upper limit on the branching ratio of 1.1×10-6, which is a factor of 60 more stringent than previous limits in the mx region below 30 keV. This experiment rules out the existence of light (mX

Original language	English
Pages (from-to)	2440-2443
Number of pages	4
Journal	Physical Review Letters
Volume	66
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.66.2440
Publication status	Published - 1991
Externally published	Yes

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ASJC Scopus subject areas

Physics and Astronomy(all)

Cite this

Asai, S., Orito, S., Yoshimura, K., & Haga, T. (1991). Search for long-lived neutral bosons in orthopositronium decay. Physical Review Letters, 66(19), 2440-2443. https://doi.org/10.1103/PhysRevLett.66.2440

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Access to Document

10.1103/PhysRevLett.66.2440