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 | |
| Publication status | Published - 1991 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Search for long-lived neutral bosons in orthopositronium decay. / Asai, S.; Orito, S.; Yoshimura, Koji; Haga, T.
In: Physical Review Letters, Vol. 66, No. 19, 1991, p. 2440-2443.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Search for long-lived neutral bosons in orthopositronium decay
AU - Asai, S.
AU - Orito, S.
AU - Yoshimura, Koji
AU - Haga, T.
PY - 1991
Y1 - 1991
N2 - 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
AB - 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
UR - http://www.scopus.com/inward/record.url?scp=4243724239&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=4243724239&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.66.2440
DO - 10.1103/PhysRevLett.66.2440
M3 - Article
VL - 66
SP - 2440
EP - 2443
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 19
ER -