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North-south asymmetry for high-energy cosmic-ray electrons measured with the PAMELA experiment

  • Nuclei, Particles, Fields, Gravitation, and Astrophysics
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Abstract

The north-south asymmetry for cosmic-ray particles was measured with one instrument of the PAMELA satellite-borne experiment in the period June 2006–May 2009. The analysis has been performed by two independent methods: by comparing the count rates in regions with identical geomagnetic conditions and by comparing the experimental distribution of particle directions with the simulated distribution that would be in the case of an isotropic particle flux. The dependences of the asymmetry on energy release in the PAMELA calorimeter and on time have been constructed. The asymmetry (N n − N s )/(N n + N s ) is 0.06 ± 0.004 at the threshold energy release in the calorimeter and gradually decreases with increasing energy release. The observed effect is shown to be produced by electrons in the energy range 10–100 GeV.

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Authors and Affiliations

  1. “MEPhI” National Research Nuclear University, Moscow, 115409, Russia

    A. V. Karelin, S. A. Voronov, A. M. Galper, I. A. Danilchenko, V. G. Zverev, S. V. Koldashov, S. A. Koldobskiy, A. A. Leonov, A. G. Mayorov, V. V. Malakhov, V. V. Mikhailov, M. F. Runtso & Y. T. Yurkin

  2. Ioffe Physicotechnical Institute, Russian Academy of Sciences, ul. Politekhnicheskaya 26, St. Petersburg, 194021, Russia

    G. A. Bazilevskaya & A. N. Kvashnin

  3. Lebedev Physical Institute, Russian Academy of Sciences, Leninskii pr. 53, Moscow, 119991, Russia

    E. A. Bogomolov, G. I. Vasilyev & S. Y. Krutkov

  4. INFN, Structure of Florence and Physics Department of University of Florence, I-50019, Florence, Italy

    O. Adriani, L. Bonechi, M. Bongi, S. Bottai, E. Vannuccini, N. Mori, P. Papini, S. B. Ricciarini & P. Spillantini

  5. INFN, Structure of Naples and Physics Department of University of Naples, I-80126, Naples, Italy

    G. C. Barbarino, D. Campana, R. Carbone & G. Osteria

  6. INFN, Structure of Bari and Physics Department of University of Bari, I-10126, Bari, Italy

    R. Bellotti, A. Bruno, F. Cafagna & A. Monaco

  7. INFN, Structure of Trieste and Physics Department of University of Trieste, I-34012, Trieste, Italy

    M. Boezio, V. Bonvicini, A. Vacchi, G. Zampa, N. Zampa, E. Mocchiutti, C. Pizzolotto & R. Sarkar

  8. INFN, Structure of Rome Tor Vergata and Physics Department of University of Rome Tor Vergata, I-00133, Rome, Italy

    C. De Donato, C. De Santis, N. De Simone, V. Di Felice, R. Carbone, M. Casolino, V. Malvezzi, L. Marcelli, M. Martucci, M. Merge, F. Palma, P. Picozza & R. Sparvoli

  9. KTH, Department of Physics, and the Oskar Klein Centre for Cosmoparticle Physics, AlbaNova University Centre, 10691, Stockholm, Sweden

    P. Carlson & M. Pearce

  10. Institute of Applied Physics, 50019, Florence, Italy

    G. Castellini

  11. Universität Siegen, D-51068, Siegen, Germany

    W. Menn & M. Simon

  12. INFN, Laboratori Nazionali di Frascati, I-00044, Frascati, Italy

    M. Ricci

Authors
  1. A. V. Karelin
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  2. O. Adriani
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  3. G. C. Barbarino
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  4. G. A. Bazilevskaya
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  5. R. Bellotti
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  6. M. Boezio
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  7. E. A. Bogomolov
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  8. L. Bonechi
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  9. M. Bongi
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  10. V. Bonvicini
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  11. S. Bottai
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  12. A. Bruno
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  13. A. Vacchi
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  14. E. Vannuccini
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  15. G. I. Vasilyev
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  16. S. A. Voronov
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  17. A. M. Galper
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  18. I. A. Danilchenko
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  19. C. De Donato
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  20. C. De Santis
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  21. N. De Simone
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  22. V. Di Felice
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  23. V. G. Zverev
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  24. G. Zampa
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  25. N. Zampa
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  26. F. Cafagna
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  27. D. Campana
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  28. R. Carbone
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  29. P. Carlson
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  30. M. Casolino
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  31. G. Castellini
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  32. A. N. Kvashnin
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  33. S. V. Koldashov
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  34. S. A. Koldobskiy
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  35. S. Y. Krutkov
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  36. A. A. Leonov
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  37. V. Malvezzi
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  38. L. Marcelli
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  39. M. Martucci
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  40. A. G. Mayorov
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  41. V. V. Malakhov
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  42. W. Menn
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  43. M. Merge
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  44. V. V. Mikhailov
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  45. E. Mocchiutti
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  46. A. Monaco
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  47. N. Mori
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  48. G. Osteria
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  49. F. Palma
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  50. P. Papini
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  51. M. Pearce
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  52. P. Picozza
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  53. C. Pizzolotto
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  54. M. Ricci
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  55. S. B. Ricciarini
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  56. M. F. Runtso
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  57. R. Sarkar
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  58. M. Simon
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  59. R. Sparvoli
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  60. P. Spillantini
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  61. Y. T. Yurkin
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Corresponding author

Correspondence to A. V. Karelin.

Additional information

Original Russian Text © A.V. Karelin, O. Adriani, G.C. Barbarino, G.A. Bazilevskaya, R. Bellotti, M. Boezio, E.A. Bogomolov, L. Bonechi, M. Bongi, V. Bonvicini, S. Bottai, A. Bruno, A. Vacchi, E. Vannuccini, G.I. Vasilyev, S.A. Voronov, A.M. Galper, I.A. Danilchenko, C. De Donato, C. De Santis, N. De Simone, V. Di Felice, V.G. Zverev, G. Zampa, N. Zampa, F. Cafagna, D. Campana, R. Carbone, P. Carlson, M. Casolino, G. Castellini, A.N. Kvashnin, S.V. Koldashov, S.A. Koldobskiy, S.Y. Krutkov, A.A. Leonov, V. Malvezzi, L. Marcelli, M. Martucci, A.G. Mayorov, V.V. Malakhov, W. Menn, M. Merge, V.V. Mikhailov, E. Mocchiutti, A. Monaco, N. Mori, G. Osteria, F. Palma, P. Papini, M. Pearce, P. Picozza, C. Pizzolotto, M. Ricci, S.B. Ricciarini, M.F. Runtso, R. Sarkar, M. Simon, R. Sparvoli, P. Spillantini, Y.T. Yurkin, 2013, published in Zhurnal Eksperimental’noi i Teoreticheskoii Fiziki, 2013, Vol. 144, No. 2, pp. 312–318.

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Karelin, A.V., Adriani, O., Barbarino, G.C. et al. North-south asymmetry for high-energy cosmic-ray electrons measured with the PAMELA experiment. J. Exp. Theor. Phys. 117, 268–273 (2013). https://doi.org/10.1134/S1063776113100129

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  • DOI: https://doi.org/10.1134/S1063776113100129

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