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Search for anomalies in the ν e appearance from a ν μ beam

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Abstract

We report an updated result from the ICARUS experiment on the search for ν μ →ν e anomalies with the CNGS beam, produced at CERN with an average energy of 20 GeV and traveling 730 km to the Gran Sasso Laboratory. The present analysis is based on a total sample of 1995 events of CNGS neutrino interactions, which corresponds to an almost doubled sample with respect to the previously published result. Four clear ν e events have been visually identified over the full sample, compared with an expectation of 6.4±0.9 events from conventional sources. The result is compatible with the absence of additional anomalous contributions. At 90 % and 99 % confidence levels, the limits to possible oscillated events are 3.7 and 8.3 respectively. The corresponding limit to oscillation probability becomes consequently 3.4×10−3 and 7.6×10−3, respectively. The present result confirms, with an improved sensitivity, the early result already published by the ICARUS Collaboration.

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Acknowledgements

The ICARUS Collaboration acknowledges the fundamental contribution to the construction and operation of the experiment given by INFN and, in particular, by the LNGS Laboratory and its Directors. The Polish groups acknowledge the support of the Ministry of Science and Higher Education, and of National Science Centre, Poland. Finally, we thank CERN, in particular the CNGS staff, for the successful operation of the neutrino beam facility.

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Authors and Affiliations

  1. Laboratori Nazionali del Gran Sasso, INFN, Assergi, Italy

    M. Antonello, N. Canci, C. Rubbia, E. Segreto, D. Stefan & C. Vignoli

  2. Dipartimento di Fisica e Astronomia, Università di Padova and INFN, Padova, Italy

    B. Baibussinov, S. Centro, D. Dequal, C. Farnese, A. Fava, D. Gibin, A. Guglielmi, G. Meng, F. Pietropaolo, F. Varanini & S. Ventura

  3. Dipartimento di Fisica, Università di Pavia and INFN, Pavia, Italy

    P. Benetti, F. Boffelli, E. Calligarich, R. Dolfini, A. Falcone, A. Menegolli, C. Montanari, A. Rappoldi, G. L. Raselli, M. Rossella, M. Torti & A. Zani

  4. Politecnico di Milano and INFN, Milano, Italy

    A. Cesana, P. Sala, A. Scaramelli & M. Terrani

  5. H. Niewodniczański Institute of Nuclear Physics, Polish Academy of Science, Kraków, Poland

    K. Cieślik, A. Dabrowska, M. Haranczyk, M. Szarska & A. Zalewska

  6. Department of Physics and Astronomy, UCLA, Los Angeles, USA

    D. B. Cline, S. Otwinowski, H. G. Wang & X. Yang

  7. Dipartimento di Scienze Fisiche, Università Federico II di Napoli and INFN, Napoli, Italy

    A. G. Cocco & G. Fiorillo

  8. INR RAS, Moscow, Russia

    A. Dermenev, S. Gninenko & M. Kirsanow

  9. CERN, Geneva, Switzerland

    A. Ferrari, C. Rubbia & R. Sulej

  10. National Centre for Nuclear Research, Otwock/Swierk, Poland

    J. Lagoda & R. Sulej

  11. Institute of Physics, University of Silesia, Katowice, Poland

    A. Bubak, J. Holeczek, J. Kisiel, I. Kochanek & S. Mania

  12. INFN Laboratori Nazionali di Frascati, Frascati, Italy

    P. Picchi

  13. GSSI, L’Aquila, Italy

    C. Rubbia

  14. Institute for Radioelectronics, Warsaw University of Technology, Warsaw, Poland

    P. Plonski & K. Zaremba

  15. INFN, Pisa, Italy

    F. Sergiampietri

Authors
  1. M. Antonello
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  2. B. Baibussinov
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  3. P. Benetti
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  4. F. Boffelli
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  5. A. Bubak
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  6. E. Calligarich
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  7. N. Canci
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  8. S. Centro
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  9. A. Cesana
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  10. K. Cieślik
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  11. D. B. Cline
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  12. A. G. Cocco
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  13. A. Dabrowska
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  14. D. Dequal
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  16. R. Dolfini
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  17. A. Falcone
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  18. C. Farnese
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  19. A. Fava
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  20. A. Ferrari
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  21. G. Fiorillo
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  22. D. Gibin
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  23. S. Gninenko
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  24. A. Guglielmi
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  25. M. Haranczyk
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  26. J. Holeczek
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  27. M. Kirsanow
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  28. J. Kisiel
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  29. I. Kochanek
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  30. J. Lagoda
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  31. S. Mania
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  32. A. Menegolli
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  33. G. Meng
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  34. C. Montanari
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  35. S. Otwinowski
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  36. P. Picchi
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  37. F. Pietropaolo
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  38. P. Plonski
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  39. A. Rappoldi
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  40. G. L. Raselli
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  41. M. Rossella
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  42. C. Rubbia
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  43. P. Sala
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  44. A. Scaramelli
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  45. E. Segreto
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  46. F. Sergiampietri
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  47. D. Stefan
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  48. R. Sulej
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  49. M. Szarska
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  50. M. Terrani
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  51. M. Torti
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  52. F. Varanini
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  53. S. Ventura
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  54. C. Vignoli
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  55. H. G. Wang
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  56. X. Yang
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  57. A. Zalewska
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  58. A. Zani
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  59. K. Zaremba
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Corresponding author

Correspondence to D. Gibin.

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Antonello, M., Baibussinov, B., Benetti, P. et al. Search for anomalies in the ν e appearance from a ν μ beam. Eur. Phys. J. C 73, 2599 (2013). https://doi.org/10.1140/epjc/s10052-013-2599-z

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  • DOI: https://doi.org/10.1140/epjc/s10052-013-2599-z

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