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Search for long distance correlations between extensive air showers detected by the EEE network

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Abstract.

A search for long distance correlations between individual Extensive Air Showers (EAS) detected by pairs of MRPC telescopes of the Extreme Energy Events (EEE) network was carried out. The search for an anomaly in these events is the purpose of our work. A dataset obtained by all the possible 45 pairs between 10 EEE cluster sites (hosting at least two telescopes), located at relative distances between 86 and 1200km, was analyzed, corresponding to an overall period of 3968 days time exposure. To estimate the possible event excess with respect to the spurious rate, the number of coincidence events was extracted as a function of the time difference between the arrival of the showers in the two sites, from \(\pm 10\) s to the smallest time interval where events are still observed. The analysis was done taking into account both the time and orientation correlation between the showers detected by the telescope pairs. A few candidate events with unusually small time difference and angular distance were observed, with a p-value sensibly smaller than a confidence level of 0.05.

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Authors and Affiliations

  1. Museo Storico della Fisica, Centro Studi e Ricerche Enrico Fermi, Roma, Italy

    M. Abbrescia, L. Baldini, R. Baldini Ferroli, G. Batignani, M. Battaglieri, S. Boi, E. Bossini, F. Carnesecchi, A. Chiavassa, C. Cicalo, L. Cifarelli, F. Coccetti, E. Coccia, D. De Gruttola, S. De Pasquale, F. L. Fabbri, P. Galeotti, M. Garbini, G. Gemme, I. Gnesi, S. Grazzi, C. Gustavino, D. Hatzifotiadou, P. La Rocca, G. Mandaglio, M. N. Mazziotta, S. Miozzi, R. Nania, F. Noferini, F. Nozzoli, F. Palmonari, M. Panareo, M. P. Panetta, R. Paoletti, L. Perasso, F. Pilo, G. Piragino, S. Pisano, F. Riggi, G. C. Righini, C. Ripoli, G. Sartorelli, E. Scapparone, M. Schioppa, A. Scribano, M. Selvi, S. Serci, S. Squarcia, M. Taiuti, G. Terreni, A. Trifirò, M. Trimarchi, L. Votano, M. C. S. Williams, L. Zheng, A. Zichichi & R. Zuyeuski

  2. INFN and Dipartimento Interateneo di Fisica, Università di Bari, Bari, Italy

    M. Abbrescia

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

    L. Baldini, G. Batignani, F. Pilo, A. Scribano & G. Terreni

  4. INFN, Laboratori Nazionali di Frascati, Frascati (RM), Italy

    R. Baldini Ferroli, F. L. Fabbri, S. Miozzi & S. Pisano

  5. INFN Gruppo Collegato di Siena and Dipartimento di Fisica, Università di Siena, Siena, Italy

    E. Bossini & R. Paoletti

  6. INFN and Dipartimento di Fisica e Astronomia, Università di Bologna, Bologna, Italy

    F. Carnesecchi, L. Cifarelli, M. Garbini, D. Hatzifotiadou, R. Nania, F. Noferini, F. Palmonari, G. Sartorelli, E. Scapparone, M. Selvi, M. C. S. Williams & A. Zichichi

  7. INFN and Dipartimento di Fisica, Università di Torino, Torino, Italy

    A. Chiavassa, P. Galeotti, I. Gnesi & G. Piragino

  8. INFN and Dipartimento di Fisica, Università di Cagliari, Cagliari, Italy

    S. Boi, C. Cicalo & S. Serci

  9. INFN and Dipartimento di Fisica, Università di Roma Tor Vergata, Roma, Italy

    E. Coccia

  10. INFN and Dipartimento di Matematica e Fisica, Università del Salento, Lecce, Italy

    M. Panareo & M. P. Panetta

  11. INFN and Dipartimento di Fisica, Università di Salerno, Salerno, Italy

    S. De Pasquale & C. Ripoli

  12. INFN, Laboratori Nazionali del Gran Sasso, Assergi (AQ), Italy

    C. Gustavino & L. Votano

  13. INFN, CNAF, Bologna, Italy

    G. Maron & M. C. Vistoli

  14. ICSC World Laboratory, Geneva, Switzerland

    O. Maragoto Rodriguez, W. Park, L. Zheng & R. Zuyeuski

  15. CERN, Geneva, Switzerland

    D. Hatzifotiadou, M. C. S. Williams, L. Zheng, A. Zichichi & R. Zuyeuski

  16. JINR, Dubna, Russia

    V. Frolov

  17. INFN and Dipartimento di Fisica, Università di Genova, Genova, Italy

    M. Battaglieri, G. Gemme, L. Perasso, S. Squarcia & M. Taiuti

  18. INFN and Dipartimento di Fisica e Astronomia, Università di Catania, Catania, Italy

    P. La Rocca & F. Riggi

  19. INFN Sezione di Catania and Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche e Ambientali, Università di Messina, Messina, Italy

    G. Mandaglio

  20. INFN, Sezione di Bari, Bari, Italy

    M. N. Mazziotta

  21. INFN, ASI Science Data Center, Roma, Italy

    F. Nozzoli

  22. INFN and Dipartimento di Fisica, Università della Calabria, Cosenza, Italy

    M. Schioppa

  23. INFN Sezione di Catania and Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra, Università di Messina, Messina, Italy

    A. Trifirò & M. Trimarchi

Authors
  1. M. Abbrescia
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  2. L. Baldini
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  3. R. Baldini Ferroli
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  4. G. Batignani
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  5. M. Battaglieri
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  6. S. Boi
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  7. E. Bossini
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  8. F. Carnesecchi
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  9. A. Chiavassa
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  10. C. Cicalo
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  11. L. Cifarelli
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  12. F. Coccetti
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  13. E. Coccia
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  14. D. De Gruttola
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  15. S. De Pasquale
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  16. F. L. Fabbri
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  17. V. Frolov
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  18. P. Galeotti
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  19. M. Garbini
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  20. G. Gemme
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  21. I. Gnesi
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  22. S. Grazzi
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  23. C. Gustavino
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  24. D. Hatzifotiadou
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  25. P. La Rocca
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  26. G. Mandaglio
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  27. O. Maragoto Rodriguez
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  28. G. Maron
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  29. M. N. Mazziotta
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  30. S. Miozzi
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  31. R. Nania
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  32. F. Noferini
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  33. F. Nozzoli
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  34. F. Palmonari
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  35. M. Panareo
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  36. M. P. Panetta
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  37. R. Paoletti
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  38. W. Park
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  39. L. Perasso
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  40. F. Pilo
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  41. G. Piragino
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  42. S. Pisano
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  43. F. Riggi
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  44. G. C. Righini
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  45. C. Ripoli
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  46. G. Sartorelli
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  47. E. Scapparone
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  48. M. Schioppa
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  49. A. Scribano
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  50. M. Selvi
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  51. S. Serci
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  52. S. Squarcia
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  53. M. Taiuti
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  54. G. Terreni
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  55. A. Trifirò
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  56. M. Trimarchi
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  57. M. C. Vistoli
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  58. L. Votano
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  59. M. C. S. Williams
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  60. L. Zheng
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  61. A. Zichichi
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  62. R. Zuyeuski
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Corresponding author

Correspondence to F. Riggi.

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Abbrescia, M., Baldini, L., Baldini Ferroli, R. et al. Search for long distance correlations between extensive air showers detected by the EEE network. Eur. Phys. J. Plus 133, 34 (2018). https://doi.org/10.1140/epjp/i2018-11898-x

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