학술논문
Study of the K- -> mu- nu pi0 decay
Document Type
Working Paper
Author
Ajinenko, I.; Akimenko, S.; Britvich, G.; Britvich, I.; Datsko, K.; Filin, A.; Inyakin, A.; Konstantinov, A.; Konstantinov, V.; Korolkov, I.; Leontiev, V.; Novikov, V.; Obraztsov, V.; Polyakov, V.; Romanovsky, V.; Shelikhov, V.; Smirnov, N.; Soldatov, M.; Tchikilev, O.; Usenko, E.; Vasiliev, M.; Vlasov, E.; Yakimchuk, V.; Yushchenko, O.; Bolotov, V.; Laptev, S.; Lebedev, V.; Pastsjak, A.; Polyarush, A.; Sirodeev, R.
Source
Phys.Atom.Nucl.66:105-109,2003; Yad.Fiz.66:107-111,2003
Subject
Language
Abstract
The decay $K^{-} \to \mu^{-} \bar{\nu} \pi^{0}$ has been studied using in-flight decays detected with ``ISTRA+'' setup operating in the 25 GeV negative secondary beam of the U-70 PS. About 112K events were used for the analysis. The $\lambda_{+}$ and $\lambda_{0}$ slope parameters of the decay formfactors $f_{+}(t)$, $f_{0}(t)$ have been measured : $\lambda_{+}= 0.0321 \pm 0.004$(stat) $\pm 0.002$(syst) $\lambda_{0}= 0.0209 \pm 0.004$(stat) $\pm 0.002$(syst); the correlation $d \lambda_{0}/d \lambda_{+}=-0.46$ The limits on the possible tensor and scalar couplings have been derived: $f_{T}/f_{+}(0)=-0.021 \pm 0.028$(stat) $\pm 0.014$(theory); $f_{S}/f_{+}(0)=0.004 \pm 0.005$(stat) $\pm 0.005$(theory)
Comment: 9 pages, Latex, 5 Postscript figures
Comment: 9 pages, Latex, 5 Postscript figures