K   e 3  Decay Studies in the OKA Experiment

O. P. Yushchenko; V. F. Kurshetsov; A. P. Filin; S. A. Akimenko; A. V. Artamonov; A. M. Blik; V. V. Brekhovskikh; V. S. Burtovoy; S. V. Donskov; A. V. Inyakin; A. M. Gorin; G. V. Khaustov; S. A. Kholodenko; V. N. Kolosov; A. S. Konstantinov; V. M. Leontiev; V. A. Lishin; M. V. Medynsky; Yu. V. Mikhailov; V. F. Obraztsov; V. A. Polyakov; A. V. Popov; V. I. Romanovsky; V. I. Rykalin; A. S. Sadovsky; V. D. Samoilenko; V. K. Semenov; O. V. Stenyakin; O. G. Tchikilev; V. A. Uvarov; V. A. Duk; S. N. Filippov; E. N. Guschin; Yu. G. Kudenko; A. A. Khudyakov; V. I. Kravtsov; A. Yu. Polyarush; V. N. Bychkov; G. D. Kekelidze; V. M. Lysan; B. Zh. Zalikhanov

doi:10.1134/S0021364018030037

K_e3 Decay Studies in the OKA Experiment

Authors: Yushchenko O.P.¹, Kurshetsov V.F.¹, Filin A.P.¹, Akimenko S.A.¹, Artamonov A.V.¹, Blik A.M.¹, Brekhovskikh V.V.¹, Burtovoy V.S.¹, Donskov S.V.¹, Inyakin A.V.¹, Gorin A.M.¹, Khaustov G.V.¹, Kholodenko S.A.¹, Kolosov V.N.¹, Konstantinov A.S.¹, Leontiev V.M.¹, Lishin V.A.¹, Medynsky M.V.¹, Mikhailov Y.V.¹, Obraztsov V.F.¹, Polyakov V.A.¹, Popov A.V.¹, Romanovsky V.I.¹, Rykalin V.I.¹, Sadovsky A.S.¹, Samoilenko V.D.¹, Semenov V.K.¹, Stenyakin O.V.¹, Tchikilev O.G.¹, Uvarov V.A.¹, Duk V.A.², Filippov S.N.², Guschin E.N.², Kudenko Y.G.², Khudyakov A.A.², Kravtsov V.I.², Polyarush A.Y.³, Bychkov V.N.³, Kekelidze G.D.³, Lysan V.M.³, Zalikhanov B.Z.³
Affiliations:
1. Institute for High Energy Physics
2. Institute for Nuclear Research
3. Joint Institute for Nuclear Research
Issue: Vol 107, No 3 (2018)
Pages: 139-142
Section: Fields, Particles, and Nuclei
URL: https://journals.rcsi.science/0021-3640/article/view/160769
DOI: https://doi.org/10.1134/S0021364018030037
ID: 160769

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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/cK⁺ 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.

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Ke3 Decay Studies in the OKA Experiment

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Abstract

About the authors

Supplementary files

K_e3 Decay Studies in the OKA Experiment