Title of article
Search for an exotic three-body decay of orthopositronium
Author/Authors
A Badertscher، نويسنده , , P Crivelli، نويسنده , , M Felcini، نويسنده , , S.N. Gninenko، نويسنده , , N.A Goloubev، نويسنده , , P Nédélec، نويسنده , , J.P. Peigneux، نويسنده , , J.K. Postoev، نويسنده , , A Rubbia، نويسنده , , D. Sillou، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2002
Pages
6
From page
29
To page
34
Abstract
We report on a direct search for a three-body decay of the orthopositronium into a photon and two penetrating particles, o-Ps→γ+X1+X2. The existence of this decay could explain the discrepancy between the measured and the predicted values of the orthopositronium decay rate. From the analysis of the collected data a single candidate event is found, consistent with the expected background. This allows to set an upper limit on the branching ratio B(o-Ps→γ+X1+X2)<4.4×10−5 (at the 90% confidence level), for the photon energy in the range from 40 keV
Keywords
Orthopositronium decay , New particles , Experimental tests
Journal title
PHYSICS LETTERS B
Serial Year
2002
Journal title
PHYSICS LETTERS B
Record number
916065
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