Title of article
Search for a neutral particle of mass 33.9 MeV in pion decay
Author/Authors
M. Daum، نويسنده , , R. Frosch، نويسنده , , W. Hajdas، نويسنده , , M. Janousch، نويسنده , , P.-R. Kettle، نويسنده , , St. Ritt، نويسنده , , Z.G. Zhao، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 1995
Pages
5
From page
179
To page
183
Abstract
We have measured the muon momentum distribution in charged pion decay in flight in order to search for a small branching fraction η of pion decays π+ → μ+ + X, in which a heavy neutral particle X with a mass of 33.9 MeV would be emitted. The upper limit of η at a confidence level of 95% is found to be 2.6×10−8.
Journal title
PHYSICS LETTERS B
Serial Year
1995
Journal title
PHYSICS LETTERS B
Record number
905788
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