Measurement of the TeV atmospheric muon charge ratio with the complete OPERA data set

N. Agafonova; A. Aleksandrov; A. Anokhina; S. Aoki; A. Ariga; T. Ariga; D. Bender; A. Bertolin; C. Bozza; R. Brugnera; A. Buonaura; S. Buontempo; B. Büttner; M. Chernyavsky; A. Chukanov; L. Consiglio; N. D'Ambrosio; G. De Lellis; M. De Serio; P. Del Amo Sanchez; A. Di Crescenzo; D. Di Ferdinando; N. Di Marco; S. Dmitrievski; M. Dracos; D. Duchesneau; S. Dusini; T. Dzhatdoev; J. Ebert; A. Ereditato; R. A. Fini; T. Fukuda; G. Galati; A. Garfagnini; G. Giacomelli; C. Göllnitz; J. Goldberg; Y. Gornushkin; G. Grella; M. Guler; C. Gustavino; C. Hagner; T. Hara; A. Hollnagel; B. Hosseini; H. Ishida; K. Ishiguro; K. Jakovcic; C. Jollet; C. Kamiscioglu; M. Kamiscioglu; J. Kawada; J. H. Kim; S. H. Kim; N. Kitagawa; B. Klicek; K. Kodama; M. Komatsu; U. Kose; I. Kreslo; A. Lauria; J. Lenkeit; A. Ljubicic; A. Longhin; P. Loverre; A. Malgin; M. Malenica; G. Mandrioli; T. Matsuo; V. Matveev; N. Mauri; E. Medinaceli; A. Meregaglia; S. Mikado; P. Monacelli; M. C. Montesi; K. Morishima; M. T. Muciaccia; N. Naganawa; T. Naka; M. Nakamura; T. Nakano; Y. Nakatsuka; K. Niwa; S. Ogawa; N. Okateva; A. Olshevsky; T. Omura; K. Ozaki; A. Paoloni; B. D. Park; I. G. Park; L. Pasqualini; A. Pastore; L. Patrizii; H. Pessard; C. Pistillo; D. Podgrudkov; N. Polukhina; M. Pozzato; F. Pupilli; M. Roda; H. Rokujo; T. Roganova; G. Rosa; O. Ryazhskaya; O. Sato; A. Schembri; I. Shakiryanova; T. Shchedrina; A. Sheshukov; H. Shibuya; T. Shiraishi; G. Shoziyoev; S. Simone; M. Sioli; C. Sirignano; G. Sirri; M. Spinetti; L. Stanco; N. Starkov; S. M. Stellacci; M. Stipcevic; P. Strolin; S. Takahashi; M. Tenti; F. Terranova; V. Tioukov; S. Tufanli; P. Vilain; M. Vladimirov; L. Votano; J. L. Vuilleumier; G. Wilquet; B. Wonsak; C. S. Yoon; S. Zemskova; A. Zghiche

doi:10.1140/epjc/s10052-014-2933-0

Measurement of the TeV atmospheric muon charge ratio with the complete OPERA data set

N. Agafonova, A. Aleksandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, D. Bender, A. Bertolin, C. Bozza, R. Brugnera, A. Buonaura, S. Buontempo, B. Büttner, M. Chernyavsky, A. Chukanov, L. Consiglio, N. D'Ambrosio, G. De Lellis, M. De Serio, P. Del Amo SanchezA. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, R. A. Fini, T. Fukuda, G. Galati, A. Garfagnini, G. Giacomelli, C. Göllnitz, J. Goldberg, Y. Gornushkin, G. Grella, M. Guler, C. Gustavino, C. Hagner, T. Hara, A. Hollnagel, B. Hosseini, H. Ishida, K. Ishiguro, K. Jakovcic, C. Jollet, C. Kamiscioglu, M. Kamiscioglu, J. Kawada, J. H. Kim, S. H. Kim, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, A. Lauria, J. Lenkeit, A. Ljubicic, A. Longhin, P. Loverre, A. Malgin, M. Malenica, G. Mandrioli, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, A. Meregaglia, S. Mikado, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, Y. Nakatsuka, K. Niwa, S. Ogawa, N. Okateva, A. Olshevsky, T. Omura, K. Ozaki, A. Paoloni, B. D. Park, I. G. Park, L. Pasqualini, A. Pastore, L. Patrizii, H. Pessard, C. Pistillo, D. Podgrudkov, N. Polukhina, M. Pozzato, F. Pupilli, M. Roda, H. Rokujo, T. Roganova, G. Rosa, O. Ryazhskaya, O. Sato, A. Schembri, I. Shakiryanova, T. Shchedrina, A. Sheshukov, H. Shibuya, T. Shiraishi, G. Shoziyoev, S. Simone, M. Sioli, C. Sirignano, G. Sirri, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, P. Strolin, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, S. Tufanli, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, C. S. Yoon, S. Zemskova, A. Zghiche

Research output: Contribution to journal › Article

25 Citations (Scopus)

Abstract

The OPERA detector, designed to search for νμ → ντ oscillations in the CNGS beam, is located in the underground Gran Sasso laboratory, a privileged location to study TeV-scale cosmic rays. For the analysis here presented, the detector was used to measure the atmospheric muon charge ratio in the TeV region. OPERA collected chargeseparated cosmic ray data between 2008 and 2012. More than 3 million atmospheric muon events were detected and reconstructed, among which about 110000 multiple muon bundles. The charge ratio R_μ ≡ N_μ+/N_μ − was measured separately for single and for multiple muon events. The analysis exploited the inversion of the magnet polarity which was performed on purpose during the 2012 Run. The combination of the two data sets with opposite magnet polarities allowedminimizing systematic uncertainties and reaching an accurate determination of the muon charge ratio. Data were fitted to obtain relevant parameters on the composition of primary cosmic rays and the associated kaon production in the forward fragmentation region. In the surface energy range 1–20 TeV investigated by OPERA, R_μ is well described by a parametric model including only pion and kaon contributions to themuon flux, showing no significant contribution of the prompt component. The energy independence supports the validity of Feynman scaling in the fragmentation region up to 200 TeV/nucleon primary energy.

Original language	English
Article number	2933
Pages (from-to)	1-9
Number of pages	9
Journal	European Physical Journal C
Volume	74
Issue number	7
DOIs	https://doi.org/10.1140/epjc/s10052-014-2933-0
Publication status	Published - Jul 15 2014
Externally published	Yes

All Science Journal Classification (ASJC) codes

Engineering (miscellaneous)
Physics and Astronomy (miscellaneous)

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10.1140/epjc/s10052-014-2933-0

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Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bender, D., Bertolin, A., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Büttner, B., Chernyavsky, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., ... Zghiche, A. (2014). Measurement of the TeV atmospheric muon charge ratio with the complete OPERA data set. European Physical Journal C, 74(7), 1-9. [2933]. https://doi.org/10.1140/epjc/s10052-014-2933-0

Measurement of the TeV atmospheric muon charge ratio with the complete OPERA data set. / Agafonova, N.; Aleksandrov, A.; Anokhina, A.; Aoki, S.; Ariga, A.; Ariga, T.; Bender, D.; Bertolin, A.; Bozza, C.; Brugnera, R.; Buonaura, A.; Buontempo, S.; Büttner, B.; Chernyavsky, M.; Chukanov, A.; Consiglio, L.; D'Ambrosio, N.; De Lellis, G.; De Serio, M.; Del Amo Sanchez, P.; Di Crescenzo, A.; Di Ferdinando, D.; Di Marco, N.; Dmitrievski, S.; Dracos, M.; Duchesneau, D.; Dusini, S.; Dzhatdoev, T.; Ebert, J.; Ereditato, A.; Fini, R. A.; Fukuda, T.; Galati, G.; Garfagnini, A.; Giacomelli, G.; Göllnitz, C.; Goldberg, J.; Gornushkin, Y.; Grella, G.; Guler, M.; Gustavino, C.; Hagner, C.; Hara, T.; Hollnagel, A.; Hosseini, B.; Ishida, H.; Ishiguro, K.; Jakovcic, K.; Jollet, C.; Kamiscioglu, C.; Kamiscioglu, M.; Kawada, J.; Kim, J. H.; Kim, S. H.; Kitagawa, N.; Klicek, B.; Kodama, K.; Komatsu, M.; Kose, U.; Kreslo, I.; Lauria, A.; Lenkeit, J.; Ljubicic, A.; Longhin, A.; Loverre, P.; Malgin, A.; Malenica, M.; Mandrioli, G.; Matsuo, T.; Matveev, V.; Mauri, N.; Medinaceli, E.; Meregaglia, A.; Mikado, S.; Monacelli, P.; Montesi, M. C.; Morishima, K.; Muciaccia, M. T.; Naganawa, N.; Naka, T.; Nakamura, M.; Nakano, T.; Nakatsuka, Y.; Niwa, K.; Ogawa, S.; Okateva, N.; Olshevsky, A.; Omura, T.; Ozaki, K.; Paoloni, A.; Park, B. D.; Park, I. G.; Pasqualini, L.; Pastore, A.; Patrizii, L.; Pessard, H.; Pistillo, C.; Podgrudkov, D.; Polukhina, N.; Pozzato, M.; Pupilli, F.; Roda, M.; Rokujo, H.; Roganova, T.; Rosa, G.; Ryazhskaya, O.; Sato, O.; Schembri, A.; Shakiryanova, I.; Shchedrina, T.; Sheshukov, A.; Shibuya, H.; Shiraishi, T.; Shoziyoev, G.; Simone, S.; Sioli, M.; Sirignano, C.; Sirri, G.; Spinetti, M.; Stanco, L.; Starkov, N.; Stellacci, S. M.; Stipcevic, M.; Strolin, P.; Takahashi, S.; Tenti, M.; Terranova, F.; Tioukov, V.; Tufanli, S.; Vilain, P.; Vladimirov, M.; Votano, L.; Vuilleumier, J. L.; Wilquet, G.; Wonsak, B.; Yoon, C. S.; Zemskova, S.; Zghiche, A.

In: European Physical Journal C, Vol. 74, No. 7, 2933, 15.07.2014, p. 1-9.

Research output: Contribution to journal › Article

Agafonova, N, Aleksandrov, A, Anokhina, A, Aoki, S, Ariga, A, Ariga, T, Bender, D, Bertolin, A, Bozza, C, Brugnera, R, Buonaura, A, Buontempo, S, Büttner, B, Chernyavsky, M, Chukanov, A, Consiglio, L, D'Ambrosio, N, De Lellis, G, De Serio, M, Del Amo Sanchez, P, Di Crescenzo, A, Di Ferdinando, D, Di Marco, N, Dmitrievski, S, Dracos, M, Duchesneau, D, Dusini, S, Dzhatdoev, T, Ebert, J, Ereditato, A, Fini, RA, Fukuda, T, Galati, G, Garfagnini, A, Giacomelli, G, Göllnitz, C, Goldberg, J, Gornushkin, Y, Grella, G, Guler, M, Gustavino, C, Hagner, C, Hara, T, Hollnagel, A, Hosseini, B, Ishida, H, Ishiguro, K, Jakovcic, K, Jollet, C, Kamiscioglu, C, Kamiscioglu, M, Kawada, J, Kim, JH, Kim, SH, Kitagawa, N, Klicek, B, Kodama, K, Komatsu, M, Kose, U, Kreslo, I, Lauria, A, Lenkeit, J, Ljubicic, A, Longhin, A, Loverre, P, Malgin, A, Malenica, M, Mandrioli, G, Matsuo, T, Matveev, V, Mauri, N, Medinaceli, E, Meregaglia, A, Mikado, S, Monacelli, P, Montesi, MC, Morishima, K, Muciaccia, MT, Naganawa, N, Naka, T, Nakamura, M, Nakano, T, Nakatsuka, Y, Niwa, K, Ogawa, S, Okateva, N, Olshevsky, A, Omura, T, Ozaki, K, Paoloni, A, Park, BD, Park, IG, Pasqualini, L, Pastore, A, Patrizii, L, Pessard, H, Pistillo, C, Podgrudkov, D, Polukhina, N, Pozzato, M, Pupilli, F, Roda, M, Rokujo, H, Roganova, T, Rosa, G, Ryazhskaya, O, Sato, O, Schembri, A, Shakiryanova, I, Shchedrina, T, Sheshukov, A, Shibuya, H, Shiraishi, T, Shoziyoev, G, Simone, S, Sioli, M, Sirignano, C, Sirri, G, Spinetti, M, Stanco, L, Starkov, N, Stellacci, SM, Stipcevic, M, Strolin, P, Takahashi, S, Tenti, M, Terranova, F, Tioukov, V, Tufanli, S, Vilain, P, Vladimirov, M, Votano, L, Vuilleumier, JL, Wilquet, G, Wonsak, B, Yoon, CS, Zemskova, S & Zghiche, A 2014, 'Measurement of the TeV atmospheric muon charge ratio with the complete OPERA data set', European Physical Journal C, vol. 74, no. 7, 2933, pp. 1-9. https://doi.org/10.1140/epjc/s10052-014-2933-0

Agafonova, N. ; Aleksandrov, A. ; Anokhina, A. ; Aoki, S. ; Ariga, A. ; Ariga, T. ; Bender, D. ; Bertolin, A. ; Bozza, C. ; Brugnera, R. ; Buonaura, A. ; Buontempo, S. ; Büttner, B. ; Chernyavsky, M. ; Chukanov, A. ; Consiglio, L. ; D'Ambrosio, N. ; De Lellis, G. ; De Serio, M. ; Del Amo Sanchez, P. ; Di Crescenzo, A. ; Di Ferdinando, D. ; Di Marco, N. ; Dmitrievski, S. ; Dracos, M. ; Duchesneau, D. ; Dusini, S. ; Dzhatdoev, T. ; Ebert, J. ; Ereditato, A. ; Fini, R. A. ; Fukuda, T. ; Galati, G. ; Garfagnini, A. ; Giacomelli, G. ; Göllnitz, C. ; Goldberg, J. ; Gornushkin, Y. ; Grella, G. ; Guler, M. ; Gustavino, C. ; Hagner, C. ; Hara, T. ; Hollnagel, A. ; Hosseini, B. ; Ishida, H. ; Ishiguro, K. ; Jakovcic, K. ; Jollet, C. ; Kamiscioglu, C. ; Kamiscioglu, M. ; Kawada, J. ; Kim, J. H. ; Kim, S. H. ; Kitagawa, N. ; Klicek, B. ; Kodama, K. ; Komatsu, M. ; Kose, U. ; Kreslo, I. ; Lauria, A. ; Lenkeit, J. ; Ljubicic, A. ; Longhin, A. ; Loverre, P. ; Malgin, A. ; Malenica, M. ; Mandrioli, G. ; Matsuo, T. ; Matveev, V. ; Mauri, N. ; Medinaceli, E. ; Meregaglia, A. ; Mikado, S. ; Monacelli, P. ; Montesi, M. C. ; Morishima, K. ; Muciaccia, M. T. ; Naganawa, N. ; Naka, T. ; Nakamura, M. ; Nakano, T. ; Nakatsuka, Y. ; Niwa, K. ; Ogawa, S. ; Okateva, N. ; Olshevsky, A. ; Omura, T. ; Ozaki, K. ; Paoloni, A. ; Park, B. D. ; Park, I. G. ; Pasqualini, L. ; Pastore, A. ; Patrizii, L. ; Pessard, H. ; Pistillo, C. ; Podgrudkov, D. ; Polukhina, N. ; Pozzato, M. ; Pupilli, F. ; Roda, M. ; Rokujo, H. ; Roganova, T. ; Rosa, G. ; Ryazhskaya, O. ; Sato, O. ; Schembri, A. ; Shakiryanova, I. ; Shchedrina, T. ; Sheshukov, A. ; Shibuya, H. ; Shiraishi, T. ; Shoziyoev, G. ; Simone, S. ; Sioli, M. ; Sirignano, C. ; Sirri, G. ; Spinetti, M. ; Stanco, L. ; Starkov, N. ; Stellacci, S. M. ; Stipcevic, M. ; Strolin, P. ; Takahashi, S. ; Tenti, M. ; Terranova, F. ; Tioukov, V. ; Tufanli, S. ; Vilain, P. ; Vladimirov, M. ; Votano, L. ; Vuilleumier, J. L. ; Wilquet, G. ; Wonsak, B. ; Yoon, C. S. ; Zemskova, S. ; Zghiche, A. / Measurement of the TeV atmospheric muon charge ratio with the complete OPERA data set. In: European Physical Journal C. 2014 ; Vol. 74, No. 7. pp. 1-9.

@article{8cdc1c7bad4f4a2cb3f3cf8ba8d3c38d,

title = "Measurement of the TeV atmospheric muon charge ratio with the complete OPERA data set",

abstract = "The OPERA detector, designed to search for νμ → ντ oscillations in the CNGS beam, is located in the underground Gran Sasso laboratory, a privileged location to study TeV-scale cosmic rays. For the analysis here presented, the detector was used to measure the atmospheric muon charge ratio in the TeV region. OPERA collected chargeseparated cosmic ray data between 2008 and 2012. More than 3 million atmospheric muon events were detected and reconstructed, among which about 110000 multiple muon bundles. The charge ratio Rμ ≡ Nμ+/Nμ − was measured separately for single and for multiple muon events. The analysis exploited the inversion of the magnet polarity which was performed on purpose during the 2012 Run. The combination of the two data sets with opposite magnet polarities allowedminimizing systematic uncertainties and reaching an accurate determination of the muon charge ratio. Data were fitted to obtain relevant parameters on the composition of primary cosmic rays and the associated kaon production in the forward fragmentation region. In the surface energy range 1–20 TeV investigated by OPERA, Rμ is well described by a parametric model including only pion and kaon contributions to themuon flux, showing no significant contribution of the prompt component. The energy independence supports the validity of Feynman scaling in the fragmentation region up to 200 TeV/nucleon primary energy.",

author = "N. Agafonova and A. Aleksandrov and A. Anokhina and S. Aoki and A. Ariga and T. Ariga and D. Bender and A. Bertolin and C. Bozza and R. Brugnera and A. Buonaura and S. Buontempo and B. B{\"u}ttner and M. Chernyavsky and A. Chukanov and L. Consiglio and N. D'Ambrosio and {De Lellis}, G. and {De Serio}, M. and {Del Amo Sanchez}, P. and {Di Crescenzo}, A. and {Di Ferdinando}, D. and {Di Marco}, N. and S. Dmitrievski and M. Dracos and D. Duchesneau and S. Dusini and T. Dzhatdoev and J. Ebert and A. Ereditato and Fini, {R. A.} and T. Fukuda and G. Galati and A. Garfagnini and G. Giacomelli and C. G{\"o}llnitz and J. Goldberg and Y. Gornushkin and G. Grella and M. Guler and C. Gustavino and C. Hagner and T. Hara and A. Hollnagel and B. Hosseini and H. Ishida and K. Ishiguro and K. Jakovcic and C. Jollet and C. Kamiscioglu and M. Kamiscioglu and J. Kawada and Kim, {J. H.} and Kim, {S. H.} and N. Kitagawa and B. Klicek and K. Kodama and M. Komatsu and U. Kose and I. Kreslo and A. Lauria and J. Lenkeit and A. Ljubicic and A. Longhin and P. Loverre and A. Malgin and M. Malenica and G. Mandrioli and T. Matsuo and V. Matveev and N. Mauri and E. Medinaceli and A. Meregaglia and S. Mikado and P. Monacelli and Montesi, {M. C.} and K. Morishima and Muciaccia, {M. T.} and N. Naganawa and T. Naka and M. Nakamura and T. Nakano and Y. Nakatsuka and K. Niwa and S. Ogawa and N. Okateva and A. Olshevsky and T. Omura and K. Ozaki and A. Paoloni and Park, {B. D.} and Park, {I. G.} and L. Pasqualini and A. Pastore and L. Patrizii and H. Pessard and C. Pistillo and D. Podgrudkov and N. Polukhina and M. Pozzato and F. Pupilli and M. Roda and H. Rokujo and T. Roganova and G. Rosa and O. Ryazhskaya and O. Sato and A. Schembri and I. Shakiryanova and T. Shchedrina and A. Sheshukov and H. Shibuya and T. Shiraishi and G. Shoziyoev and S. Simone and M. Sioli and C. Sirignano and G. Sirri and M. Spinetti and L. Stanco and N. Starkov and Stellacci, {S. M.} and M. Stipcevic and P. Strolin and S. Takahashi and M. Tenti and F. Terranova and V. Tioukov and S. Tufanli and P. Vilain and M. Vladimirov and L. Votano and Vuilleumier, {J. L.} and G. Wilquet and B. Wonsak and Yoon, {C. S.} and S. Zemskova and A. Zghiche",

year = "2014",

month = jul,

day = "15",

doi = "10.1140/epjc/s10052-014-2933-0",

language = "English",

volume = "74",

pages = "1--9",

journal = "European Physical Journal C",

issn = "1434-6044",

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number = "7",

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TY - JOUR

T1 - Measurement of the TeV atmospheric muon charge ratio with the complete OPERA data set

AU - Agafonova, N.

AU - Aleksandrov, A.

AU - Anokhina, A.

AU - Aoki, S.

AU - Ariga, A.

AU - Ariga, T.

AU - Bender, D.

AU - Bertolin, A.

AU - Bozza, C.

AU - Brugnera, R.

AU - Buonaura, A.

AU - Buontempo, S.

AU - Büttner, B.

AU - Chernyavsky, M.

AU - Chukanov, A.

AU - Consiglio, L.

AU - D'Ambrosio, N.

AU - De Lellis, G.

AU - De Serio, M.

AU - Del Amo Sanchez, P.

AU - Di Crescenzo, A.

AU - Di Ferdinando, D.

AU - Di Marco, N.

AU - Dmitrievski, S.

AU - Dracos, M.

AU - Duchesneau, D.

AU - Dusini, S.

AU - Dzhatdoev, T.

AU - Ebert, J.

AU - Ereditato, A.

AU - Fini, R. A.

AU - Fukuda, T.

AU - Galati, G.

AU - Garfagnini, A.

AU - Giacomelli, G.

AU - Göllnitz, C.

AU - Goldberg, J.

AU - Gornushkin, Y.

AU - Grella, G.

AU - Guler, M.

AU - Gustavino, C.

AU - Hagner, C.

AU - Hara, T.

AU - Hollnagel, A.

AU - Hosseini, B.

AU - Ishida, H.

AU - Ishiguro, K.

AU - Jakovcic, K.

AU - Jollet, C.

AU - Kamiscioglu, C.

AU - Kamiscioglu, M.

AU - Kawada, J.

AU - Kim, J. H.

AU - Kim, S. H.

AU - Kitagawa, N.

AU - Klicek, B.

AU - Kodama, K.

AU - Komatsu, M.

AU - Kose, U.

AU - Kreslo, I.

AU - Lauria, A.

AU - Lenkeit, J.

AU - Ljubicic, A.

AU - Longhin, A.

AU - Loverre, P.

AU - Malgin, A.

AU - Malenica, M.

AU - Mandrioli, G.

AU - Matsuo, T.

AU - Matveev, V.

AU - Mauri, N.

AU - Medinaceli, E.

AU - Meregaglia, A.

AU - Mikado, S.

AU - Monacelli, P.

AU - Montesi, M. C.

AU - Morishima, K.

AU - Muciaccia, M. T.

AU - Naganawa, N.

AU - Naka, T.

AU - Nakamura, M.

AU - Nakano, T.

AU - Nakatsuka, Y.

AU - Niwa, K.

AU - Ogawa, S.

AU - Okateva, N.

AU - Olshevsky, A.

AU - Omura, T.

AU - Ozaki, K.

AU - Paoloni, A.

AU - Park, B. D.

AU - Park, I. G.

AU - Pasqualini, L.

AU - Pastore, A.

AU - Patrizii, L.

AU - Pessard, H.

AU - Pistillo, C.

AU - Podgrudkov, D.

AU - Polukhina, N.

AU - Pozzato, M.

AU - Pupilli, F.

AU - Roda, M.

AU - Rokujo, H.

AU - Roganova, T.

AU - Rosa, G.

AU - Ryazhskaya, O.

AU - Sato, O.

AU - Schembri, A.

AU - Shakiryanova, I.

AU - Shchedrina, T.

AU - Sheshukov, A.

AU - Shibuya, H.

AU - Shiraishi, T.

AU - Shoziyoev, G.

AU - Simone, S.

AU - Sioli, M.

AU - Sirignano, C.

AU - Sirri, G.

AU - Spinetti, M.

AU - Stanco, L.

AU - Starkov, N.

AU - Stellacci, S. M.

AU - Stipcevic, M.

AU - Strolin, P.

AU - Takahashi, S.

AU - Tenti, M.

AU - Terranova, F.

AU - Tioukov, V.

AU - Tufanli, S.

AU - Vilain, P.

AU - Vladimirov, M.

AU - Votano, L.

AU - Vuilleumier, J. L.

AU - Wilquet, G.

AU - Wonsak, B.

AU - Yoon, C. S.

AU - Zemskova, S.

AU - Zghiche, A.

PY - 2014/7/15

Y1 - 2014/7/15

N2 - The OPERA detector, designed to search for νμ → ντ oscillations in the CNGS beam, is located in the underground Gran Sasso laboratory, a privileged location to study TeV-scale cosmic rays. For the analysis here presented, the detector was used to measure the atmospheric muon charge ratio in the TeV region. OPERA collected chargeseparated cosmic ray data between 2008 and 2012. More than 3 million atmospheric muon events were detected and reconstructed, among which about 110000 multiple muon bundles. The charge ratio Rμ ≡ Nμ+/Nμ − was measured separately for single and for multiple muon events. The analysis exploited the inversion of the magnet polarity which was performed on purpose during the 2012 Run. The combination of the two data sets with opposite magnet polarities allowedminimizing systematic uncertainties and reaching an accurate determination of the muon charge ratio. Data were fitted to obtain relevant parameters on the composition of primary cosmic rays and the associated kaon production in the forward fragmentation region. In the surface energy range 1–20 TeV investigated by OPERA, Rμ is well described by a parametric model including only pion and kaon contributions to themuon flux, showing no significant contribution of the prompt component. The energy independence supports the validity of Feynman scaling in the fragmentation region up to 200 TeV/nucleon primary energy.

AB - The OPERA detector, designed to search for νμ → ντ oscillations in the CNGS beam, is located in the underground Gran Sasso laboratory, a privileged location to study TeV-scale cosmic rays. For the analysis here presented, the detector was used to measure the atmospheric muon charge ratio in the TeV region. OPERA collected chargeseparated cosmic ray data between 2008 and 2012. More than 3 million atmospheric muon events were detected and reconstructed, among which about 110000 multiple muon bundles. The charge ratio Rμ ≡ Nμ+/Nμ − was measured separately for single and for multiple muon events. The analysis exploited the inversion of the magnet polarity which was performed on purpose during the 2012 Run. The combination of the two data sets with opposite magnet polarities allowedminimizing systematic uncertainties and reaching an accurate determination of the muon charge ratio. Data were fitted to obtain relevant parameters on the composition of primary cosmic rays and the associated kaon production in the forward fragmentation region. In the surface energy range 1–20 TeV investigated by OPERA, Rμ is well described by a parametric model including only pion and kaon contributions to themuon flux, showing no significant contribution of the prompt component. The energy independence supports the validity of Feynman scaling in the fragmentation region up to 200 TeV/nucleon primary energy.

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U2 - 10.1140/epjc/s10052-014-2933-0

DO - 10.1140/epjc/s10052-014-2933-0

M3 - Article

AN - SCOPUS:84903419850

VL - 74

SP - 1

EP - 9

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 7

M1 - 2933

ER -