Measurement of charged kaon semileptonic decay branching fraction using ISTRA+ detector

Measurement of charged kaon semileptonic decay branching fraction using ISTRA+ detector

The ratio of branching fractions for and K − → π − π 0 decays has been measured using the ISTRA+ spectrometer. The result of our measurement is the following: Using the current PDG value for the K 2π branching fraction, this result leads to the measured K e 3 branching fraction of Br( K e 3 ) = 0.05...

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Veröffentlicht in:Physics of atomic nuclei 2014, Vol.77 (6), p.725-732
Hauptverfasser: Uvarov, V. A., Akimenko, S. A., Bolotov, V. N., Britvich, G. I., Duk, V. A., Filin, A. P., Inyakin, A. V., Kholodenko, S. A., Khudyakov, A. A., Konstantinov, A. S., Konstantinov, V. F., Leontiev, V. M., Makarov, A. I., Obraztsov, V. F., Polyakov, V. A., Polyarush, A. Yu, Popov, A. V., Romanovsky, V. I., Stenyakin, O. V., Tchikilev, O. G., Yushchenko, O. P.
Format: Artikel
Sprache:eng
Schlagworte:
Elementary Particles and Fields
Particle and Nuclear Physics
Physics
Physics and Astronomy
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Zusammenfassung:The ratio of branching fractions for and K − → π − π 0 decays has been measured using the ISTRA+ spectrometer. The result of our measurement is the following: Using the current PDG value for the K 2π branching fraction, this result leads to the measured K e 3 branching fraction of Br( K e 3 ) = 0.0501 ± 0.0009 and to the value of | V us | f + (0) = 0.2115 ± 0.0021.
ISSN:1063-7788
1562-692X
DOI:10.1134/S1063778814060143