Direct observation of muon-pair production by high-energy muons in the liquid-argon calorimeter BARS |
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| Authors: | V. B. Anikeev S. N. Gurzhiev S. P. Denisov O. S. Zolina S. R. Kelner T. M. Kirina R. P. Kokoulin V. V. Lipaev A. A. Petrukhin A. M. Rybin F. Sergiampietri E. E. Yanson |
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| Affiliation: | (1) Institute for High Energy Physics, Protvino, Moscow oblast, 142284, Russia;(2) Moscow Engineering Physics Institute (State University), Kashirskoe sh. 31, Moscow, 115409, Russia;(3) Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, via Livornese 1291, S. Pietro a Grado (PI), I-56010 Pisa, Italy |
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| Abstract: | Experimental data accumulated over a long-term exposure of the big liquid-argon spectrometer BARS at the Institute for High Energy Physics (IHEP, Protvino) in a horizontal flux of cosmic rays are analyzed with the aim of selecting events that correspond to muon-pair production by muons in the sensitive volume of the detector. The results obtained in this way make it possible to perform, for the first time, a direct experimental test of various theoretical estimates of the total cross section for electromagnetic muon-pair production by high-energy muons. |
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