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Study of the K − → μ − νπ 0 decay |
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| Authors: | I. V. Ajinenko S. A. Akimenko G. I. Britvich I. G. Britvich K. V. Datsko A. P. Filin A. V. Inyakin A. S. Konstantinov V. F. Konstantinov I. Ya. Korolkov V. M. Leontiev V. P. Novikov V. F. Obraztsov V. A. Polyakov V. I. Romanovsky V. I. Shelikhov N. E. Smirnov M. M. Soldatov O. G. Tchikilev E. A. Usenko M. V. Vasiliev E. V. Vlasov V. I. Yakimchuk O. P. Yushchenko V. N. Bolotov S. V. Laptev V. A. Lebedev A. R. Pastsjak A. Yu. Polyarush R. Kh. Sirodeev |
| Affiliation: | (1) Institute for High Energy Physics, Protvino, Moscow oblast, 142284, Russia;(2) Institute for Nuclear Research, Russian Academy of Sciences, pr. Shestidesyatiletiya Oktyabrya 7a, Moscow, 117312, Russia |
| Abstract: | The decay K ? → μ ? νπ 0 has been studied using in-flight decays detected with the ISTRA+ setup operating in the 25-GeV negative secondary beam of the U-70 PS. About 112K events were used for the analysis. The λ + and λ 0 slope parameters of the decay form factors f +(t) and f 0(t) have been measured: λ +=0.0321±0.004(stat.)±0.002(syst.), λ 0=0.0209±0.004(stat.)±0.002(syst.); the correlation dλ 0/dλ +=?0.46. The limits on the possible tensor and scalar couplings have been derived: f T/f +(0)=?0.021±0.028(stat.)±0.014(theor.), f S/f +(0)=0.004±0.005(stat.)±0.005(theor.). |
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