### Abstract

The form factors of the decay K^{+} → π^{0}e^{+}ν (K(e3)/^{+}) have been measured with stopped kaons. A Dalitz plot containing 4.1 x 10^{4} events was analyzed. A comparison of the observed Dalitz plot with a Monte Carlo simulation determined the ratio of the strengths of possible scalar and tensor couplings to that of the vector coupling, f(S)/f_{+}(0) = -0.002 ± 0.026(stat) ± 0.014(syst) and f(T)/f_{+}(0) = -0.01 ± 0.14(stat) ± 0.09(syst). These values are consistent with the standard model prediction of zero, and disagree with a previous experiment. The analysis also yielded the coefficient of the q^{2} term in the vector form factor to be λ_{+} = 0.0278 ± 0.0026(stat) ± 0.0030(syst). (C) 2000 Elsevier Science B.V.

Original language | English |
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Pages (from-to) | 33-41 |

Number of pages | 9 |

Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |

Volume | 495 |

Issue number | 1-2 |

DOIs | |

Publication status | Published - 2000 Dec 7 |

### All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics

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## Cite this

^{+}→ π

^{0}e

^{+}ν decay.

*Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics*,

*495*(1-2), 33-41. https://doi.org/10.1016/S0370-2693(00)01235-1