Abstract
The KL→π±π0e ∓νe(ν̄e) decay was investigated with the NA48 detector at CERN SPS using a beam of long-lived neutral kaons. The branching ratio Br(KL→π ±π0e∓ν e(ν̄e))=(5.21±0.07stat±0. 09syst)×10-5 was fixed from a sample of 5464 events with 62 background events. The form factors f̄s, f̄p, λg and h̄ were found to be in agreement with previous measurements but with higher accuracy. The coupling parameter of the chiral Lagrangian L3=(-4.1±0.2)×10 -3 was evaluated from the data.
| Original language | English |
|---|---|
| Pages (from-to) | 75-85 |
| Number of pages | 11 |
| Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Volume | 595 |
| Issue number | 1-4 |
| DOIs | |
| Publication status | Published - 12 Aug 2004 |
| Externally published | Yes |
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