| Autor: |
A. M. Lee, W. Herold, D. M. Lazarus, J. Egger, T. Zhao, P.S. Cooper, Pavel Rehak, C. Alliegro, V. Chaloupka, H. Kaspar, M. E. Zeller, C. Campagnari, Henry Lubatti, Howard Gordon, N. J. Hadley |
| Rok vydání: |
1992 |
| Předmět: |
|
| Zdroj: |
Physical Review Letters. 68:278-281 |
| ISSN: |
0031-9007 |
| DOI: |
10.1103/physrevlett.68.278 |
| Popis: |
We present results of an experiment in which approximately 500 events of the decay {ital K}{sup +}{r arrow}{pi}{sup +}{ital e+}{ital e{minus}} were observed. We have measured the branching ratio for {ital K}{sub {pi}{ital e}{ital e}}{sup +} to be (2.75{plus minus}0.23{plus minus}0.13){times}10{sup {minus}7} assuming a vector interaction with a form factor of {lambda}=0.105{plus minus}0.035{plus minus}0.015. We have also found the branching ratio times decay probability for {ital K}{sup +}{r arrow}{pi}{sup +}{ital X0}, {ital X}{sup 0}{r arrow}{ital e}{sup +}{ital e{minus}} to be less than 1.5{times}10{sup {minus}8} (99% C.L.) over an {ital X}{sup 0} invariant mass range from 150 to 340 MeV/{ital c}{sup 2}. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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