Ke3 Decay Studies in the OKA Experiment

Recent results from OKA setup concerning form factor studies in K e 3 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...

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Veröffentlicht in:	JETP letters 2018-04, Vol.107 (3), p.139-142
Hauptverfasser:	Yushchenko, O. P., Kurshetsov, V. F., Filin, A. P., Akimenko, S. A., Artamonov, A. V., Blik, A. M., Brekhovskikh, V. V., Burtovoy, V. S., Donskov, S. V., Inyakin, A. V., Gorin, A. M., Khaustov, G. V., Kholodenko, S. A., Kolosov, V. N., Konstantinov, A. S., Leontiev, V. M., Lishin, V. A., Medynsky, M. V., Mikhailov, Yu. V., Obraztsov, V. F., Polyakov, V. A., Popov, A. V., Romanovsky, V. I., Rykalin, V. I., Sadovsky, A. S., Samoilenko, V. D., Semenov, V. K., Stenyakin, O. V., Tchikilev, O. G., Uvarov, V. A., Duk, V. A., Filippov, S. N., Guschin, E. N., Kudenko, Yu. G., Khudyakov, A. A., Kravtsov, V. I., Polyarush, A. Yu, Bychkov, V. N., Kekelidze, G. D., Lysan, V. M., Zalikhanov, B. Zh
Format:	Artikel
Sprache:	eng
Schlagworte:	Atomic Biological and Medical Physics Biophysics Fields Molecular Nuclei Optical and Plasma Physics Particle and Nuclear Physics Particles Physics Physics and Astronomy Quantum Information Technology Solid State Physics Spintronics
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Beschreibung
Zusammenfassung:	Recent results from OKA setup concerning form factor studies in K e 3 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 .
ISSN:	0021-3640 1090-6487
DOI:	10.1134/S0021364018030037