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Measurement of cosmic muon charge ratio with the Large Volume Detector

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arxiv 1311.6995 v5 pith:QVNEIJYW submitted 2013-11-27 hep-ex physics.ins-det

N.Yu. Agafonova , M. Aglietta , P. Antonioli , G. Bari , R. Bertoni , V.V. Boyarkin , E. Bressan , G. Bruno
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V.L. Dadykin E.A. Dobrynina R.I. Enikeev W. Fulgione P. Galeotti M. Garbini P.L. Ghia P. Giusti E. Kemp A.S. Malgin B. Miguez A. Molinario R. Persiani I.A. Pless V.G. Ryasny O.G. Ryazhskaya O. Saavedra G. Sartorelli M. Selvi G.C. Trinchero C. Vigorito V.F. Yakushev A. Zichichi (LVD Collaboration)
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classification hep-exphysics.ins-det
keywords chargemuonsratiomuondecaysdepthdetectorlarge
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abstract

The charge ratio ${k \equiv \mu^+/\mu^-}$ for atmospheric muons has been measured using Large Volume Detector (LVD) in the INFN Gran Sasso National Laboratory, Italy (minimal depth is 3000 m w.e.). To reach this depth muons should have the energy at the sea level greater than 1.3 TeV. The muon charge ratio was defined using the number of the decays of stopping positive muons in the LVD iron structure and the decays of positive and negative muons in scintillator. We have obtained the value of the muon charge ratio ${k}$ ${= 1.26 \pm 0.04(stat) \pm 0.11(sys)}$.

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