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New upper limit on the decay η→e+e-

Abstract:
We have searched for the rare decay of the η meson η→e+e- using the CLEO II detector. The η's were produced in e+e- collisions with 10 GeV center-of-mass energy at the Cornell Electron Storage Ring (CESR). We find with 90% confidence the upper limit on the branching fraction B(η→e+e-) < 7.7 × 10-5. The application of conventional elementary particle theory to this decay predicts a branching fraction of about 10-9.

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Publisher copy:
10.1103/PhysRevD.56.5359

Authors



Journal:
Physical Review D More from this journal
Volume:
56
Issue:
9
Pages:
5359-5365
Publication date:
1997-11-01
DOI:
EISSN:
1089-4918
ISSN:
0556-2821


Language:
English
Pubs id:
pubs:321874
UUID:
uuid:d9593628-6de4-4976-b2bf-0e8b58b3450a
Local pid:
pubs:321874
Source identifiers:
321874
Deposit date:
2013-11-17

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