- Abstract:
- A large sample of Dalitz decays, KL→e+e-γ, has been observed. The branching ratio is Γ(KL→e+e-γ)/Γ(K L→ all) = (9.2±0.5±0.5) × 10-6 in good agreement with theoretical predictions. We observe an enhancement at high masses in the distribution of the invariant electron-positron pair mass, compared to the distribution expected from QED. This excess is interpreted as being due to virtual vector mesons contributing to the photon propagator.
- Publication status:
- Published
- Publisher copy:
- 10.1016/0370-2693(90)90446-D
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- Journal:
- PHYSICS LETTERS B
- Volume:
- 240
- Issue:
- 1-2
- Pages:
- 283-288
- Publication date:
- 1990-04-19
- DOI:
- ISSN:
-
0370-2693
- URN:
-
uuid:b8bf3937-3c00-4559-b0e7-45b80e8c0f06
- Source identifiers:
-
15616
- Local pid:
- pubs:15616
- Language:
- English
- Copyright date:
- 1990
Journal article
MEASUREMENT OF THE RATE OF THE DECAY KL-]E+E-GAMMA AND OBSERVATION OF A FORM-FACTOR IN THIS DECAY
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