Upper Limit on the Prompt Muon Flux Derived from the LVD Underground Experiment

Details Upper Limit on the Prompt Muon Flux Derived from the LVD Underground Experiment Upper Limit on the Prompt Muon Flux Derived from the LVD Underground Experiment

1999-06-11

arxiv.org/abs/hep-ex/9906021v1

Phys.Rev. D60 (1999) 112001

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, 4 figures, RevTex. To appear in Phys. Rev. D

Scientific paper

We present the analysis of the muon events with all muon multiplicities collected during 21804 hours of operation of the first LVD tower. The measured depth-angular distribution of muon intensities has been used to obtain the normalization factor, A, the power index, gamma, of the primary all-nucleon spectrum and the ratio, R_c, of prompt muon flux to that of pi-mesons - the main parameters which determine the spectrum of cosmic ray muons at the sea level. The value of gamma = 2.77 +/- 0.05 (68% C.L.) and R_c < 2.0 x 10^-3 (95% C.L.) have been obtained. The upper limit to the prompt muon flux favours the models of charm production based on QGSM and the dual parton model.

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