Measurement of the $K_L$ nuclear interaction length in the NaI(Tl) calorimeter

Achasov, M.N. , Beloborodov, K.I. , Berdyugin, A.V. , Bogdanchikov, A.G. , Vasiljev, A.V. , Golubev, V.B. , Dimova, T.V. , Druzhinin, V.P. , Korol, A.A. , Koshuba, S.V.
JINST 10 (2015) P09006, 2015.

Abstract (data abstract)
NOVOSIBIRSK-VEPP-2M. In the study of the reaction $e^+e^-\to K_{S}K_{L}$ at the VEPP-2M $e^+e^-$ collider with the SND detector the nuclear interaction length of $K_{L}$ meson in NaI(Tl) has been measured. Its value is found to be 30-50 cm in the $K_{L}$ momentum range 0.11-0.48 GeV/$c$. The results are compared with the values used in the simulation programs GEANT4 and UNIMOD.

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