papers
Publications (3)
hep-ex2002
Search for an exotic three-body decay of orthopositronium
A. Badertscher, P. Crivelli, M. Felcini +7
We report on a direct search for a three-body decay of the orthopositronium into a photon and two penetrating particles, o-Ps -> gamma + X1 + X2. The existence of this decay could…
hep-ex2001
Study of the K- -> pi0 e- nu decay
I. Ajinenko, S. Akimenko, G. Akopdzhanov +32
The decay K- -> pi0 e- nu has been studied using in-flight decays detected with "ISTRA+" setup operating at the 25 GeV negative secondary beam of the U-70 PS. About 130K events wer…
hep-ex2006
An Improved Limit on Invisible Decays of Positronium
A. Badertscher, P. Crivelli, W. Fetscher +6
The results of a new search for positronium decays into invisible final states are reported. Convincing detection of this decay mode would be a strong evid ence for new physics bey…