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Test of exotic scalar and tensor interactions in K_e3 decay using stopped positive kaons

A. S. Levchenko
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Abstract

The form factors of the decay K+ --> pi0 e+ nu (K_e3) have been determined from the comparison of the experimental and Monte Carlo Dalitz distributions containing about 10^5 K_e3 events. The following values of the parameters were obtained: lambda_+ = 0.0278 +- 0.0017(stat) +- 0.0015(syst), f_S/f_+(0) = 0.0040 +- 0.0160(stat) +- 0.0067(syst) and f_T/f_+(0) = 0.019 +- 0.080(stat) +- 0.038(syst). Both scalar f_S and tensor f_T form factors are consistent with the Standard Model predictions of zero values.

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A. S. Levchenko. 2001-11-14. Test of exotic scalar and tensor interactions in K_e3 decay using stopped positive kaons. https://doi.org/10.1134/1.1530306

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