Test of exotic scalar and tensor interactions in Ke3 decay using stopped positive kaons
Abstract
The form factors of the decay K+ --> pi0 e+ nu (Ke3) have been determined from the comparison of the experimental and Monte Carlo Dalitz distributions containing about 105 Ke3 events. The following values of the parameters were obtained: lambda+ = 0.0278 +- 0.0017(stat) +- 0.0015(syst), fS/f+(0) = 0.0040 +- 0.0160(stat) +- 0.0067(syst) and fT/f+(0) = 0.019 +- 0.080(stat) +- 0.038(syst). Both scalar fS and tensor fT form factors are consistent with the Standard Model predictions of zero values.
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