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arxiv: 1509.01918 · v1 · pith:NRUNTJJUnew · submitted 2015-09-07 · ✦ hep-ex

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

M.N. Achasov , K.I. Beloborodov , A.V. Berdyugin , A.G. Bogdanchikov , A.V. Vasiljev , V.B. Golubev , T.V. Dimova , V.P. Druzhinin
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A.A. Korol S.V. Koshuba E.V. Pakhtusova S.I. Serednyakov Z.K. Silagadze Yu.V. Usov
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classification ✦ hep-ex
keywords interactionlengthnuclearbeencalorimetercollidercompareddetector
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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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