Cosmic rays studies with the PAMELA space experiment

Sparvoli, R. and Adriani, O. and Barbarino, G. C. and Bazilevskaya, G. A. and Bellotti, R. and Boezio, M. and Bogomolov, E. A. and Bonechi, L. and Bongi, M. and Bonvicini, V. and Bottai, S. and Bruno, A. and Cafagna, F. and Campana, D. and Carlson, P. and Casolino, M. and Castellini, G. and De Pascale, M. P. and De Santis, C. and De Simone, N. and Di Felice, V. and Galper, A. M. and Grishantseva, L. and Hofverberg, P. and Koldashov, S. V. and Krutkov, S. Y. and Kvashnin, A. N. and Leonov, A. and Malvezzi, V. and Marcelli, L. and Menn, W. and Mikhailov, V. V. and Mocchiutti, E. and Osteria, G. and Papini, P. and Pearce, M. and Picozza, P. and Ricci, M. and Ricciarini, S. B. and Simon, M. and Spillantini, P. and Stozhkov, Y. I. and Vacchi, A. and Vannuccini, E. and Vasilyev, G. and Voronov, S. A. and Yurkin, Y. T. and Zampa, G. and Zampa, N. and Zverev, V. G. (2009) Cosmic rays studies with the PAMELA space experiment. Il nuovo cimento C, 32 (5\6). pp. 1-10. ISSN 1826-9885

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The instrument PAMELA, in orbit since June 15th, 2006 on board the Russian satellite Resurs DK1, is delivering to ground 16 Gigabytes of data per day. The apparatus is designed to study charged particles in the cosmic radiation, with a particular focus on antiparticles as a possible signature of dark matter annihilation in the galactic halo; the combination of a magnetic spectrometer and different detectors—indeed—allows antiparticles to be reliably identified from a large background of other charged particles. New results on the antiproton-to-proton and positron-to-all-electron ratios over a wide energy range (1–100GeV) have been recently released by the PAMELA Collaboration, and will be summarized in this paper. While the antiproton-to-proton ratio does not show particular differences from an antiparticle standard secondary production, in the positron-to-all-electron ratio an enhancement is clearly seen at energies above 10 GeV. Possible interpretations of this effect will be briefly discussed.

Item Type: Article
Uncontrolled Keywords: Neutrino, muon, pion, and other elementary particle detectors; cosmic ray detectors ; Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.) ; Field theories in dimensions other than four ; Supersymmetric models
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 27 Mar 2020 09:48
Last Modified: 27 Mar 2020 09:48

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