K e3 Decay Studies in the OKA Experiment
Abstract
Recent results from OKA setup concerning form factor studies in K e3 decay are presented. About 5.25 M events obtained for decays of 17.7 GeV/ c K + are selected for the analysis. The linear and quadratic slopes for the decay form factor f +( t) are measured: λ+ = 2.95 ± 0.022 ± 0.018 × 10-2 for the linear slope fit and λ'+ = (2.611 ± 0.035 ± 0.028) × 10-2, λ"+ = (1.91 ± 0.19 ± 0.14) × 10-3 for the quadratic one. The scalar and tensor contributions are compatible with zero. Several alternative parametrizations are tried: the Pole fit parameter is found to be M V = 891 ± 3 MeV; the parameter of the dispersive parametrization is measured to be Λ+ = (2.458 ± 0.018) × 10-2.
- Publication:
-
Soviet Journal of Experimental and Theoretical Physics Letters
- Pub Date:
- April 2018
- DOI:
- 10.1134/S0021364018030037
- arXiv:
- arXiv:1708.09587
- Bibcode:
- 2018JETPL.107..139Y
- Keywords:
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- High Energy Physics - Experiment
- E-Print:
- doi:10.1134/S0021364018030037