Upper limit on the prompt muon flux derived from the LVD underground experiment

M. Aglietta, B. Alpat, E. D. Alyea, P. Antonioli, G. Badino, G. Bari, M. Basile, V. S. Berezinsky, F. Bersani, M. Bertaina, R. Bertoni, G. Bonoli, A. Bosco, G. Bruni, G. Cara Romeo, C. Castagnoli, A. Castellina, A. Chiavassa, J. A. Chinellato, L. CifarelliF. Cindolo, G. Conforto, A. Contin, V. L. Dadykin, A. De Silva, M. Deutsch, P. Dominici, L. G. Dos Santos, L. Emaldi, R. I. Enikeev, F. L. Fabbri, W. Fulgione, P. Galeotti, C. Ghetti, P. Ghia, P. Giusti, R. Granella, F. Grianti, G. Guidi, E. S. Hafen, P. Haridas, G. Iacobucci, N. Inoue, E. Kemp, F. F. Khalchukov, E. V. Korolkova, P. V. Korchaguin, V. B. Korchaguin, V. A. Kudryavtsev, K. Lau, M. Luvisetto, G. Maccarone, A. S. Malguin, R. Mantovani, T. Massam, B. Mayes, A. Megna, C. Melagrana, N. Mengotti Silva, C. Morello, J. Moromisato, R. Nania, G. Navarra, L. Panaro, L. Periale, A. Pesci, P. Picchi, L. Pinsky, I. A. Pless, J. Pyrlik, V. G. Ryasny, O. G. Ryazhskaya, O. Saavedra, K. Saitoh, S. Santini, G. Sartorelli, M. Selvi, N. Taborgna, V. P. Talochkin, J. Tang, G. C. Trinchero, S. Tsuji, A. Turtelli, I. Uman, P. Vallania, G. Van Buren, S. Vernetto, F. Vetrano, C. Vigorito, E. von Goeler, L. Votano, T. Wada, R. Weinstein, M. Widgoff, V. F. Yakushev, I. Yamamoto, G. T. Zatsepin, A. Zichichi

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Abstract

We present the analysis of the muon events with all muon multiplicities collected during 21804 h 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 (Formula presented) of the primary all-nucleon spectrum, and the ratio (Formula presented) of the prompt muon flux to that of π mesons—the main parameters which determine the spectrum of cosmic ray muons at the sea level. The values of (Formula presented) (68% C.L.) and (Formula presented) (95% C.L.) have been obtained. The upper limit to the prompt muon flux favors the models of charm production based on QGSM and the dual parton model.

Original languageEnglish
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume60
Issue number11
DOIs
StatePublished - 1999
Externally publishedYes

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